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Title: Valorisation of technical lignin in rigid polyurethane foam: A critical evaluation on trends, guidelines and future perspectives

Abstract

Lignin is one of the most abundant aromatic natural polymers. Produced as a by-product from the biomass refinery industries, lignin remains largely underutilised in high-value industrial applications. The incorporation of lignin in rigid polyurethane foam (RPUF) has been the focus of much research, due to its potential to replace fossil fuel-based components of RPUF. However, the overall sustainability of RPUF depends on numerous factors including processability, cost-effectiveness, and retention of performance throughout the service life. To date, the incorporation of lignin has been explored either as filler particles (through direct incorporation) or as a blendable liquid polyol introduced after chemical modifications (such as oxyalkylation, functionalisation, or depolymerisation). However, the production of lignin incorporated foam with high performance through cost-effective processing is still an ongoing challenge. Herein, this review critically appraises the progress on the effective incorporation of lignin in RPUF. Firstly, this review briefly covers the essential raw materials, formulation, important properties, and sustainability aspects of RPUF for industrial applications. Secondly, it provides insights on the key parameters of lignin of relevance to incorporation into RPUF. Thirdly, it benchmarks the reported studies on incorporation of lignin in RPUF systems by evaluating their important properties and proposes potential strategies for addressingmore » the key challenges in the incorporation of lignin in RPUF. By bridging the gaps that exist in the literature on the utilisation of lignin in RPUF this account will serve as a resource for both beginners and professionals in the polyurethane and biorefinery industries towards the successful development of lignin incorporated RPUF for industrial applications« less

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1]; ORCiD logo [1]
  1. Univ. of Queensland, Brisbane, QLD (Australia)
  2. Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Univ. of Queensland, Brisbane, QLD (Australia)
Sponsoring Org.:
USDOE
OSTI Identifier:
1844864
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Green Chemistry
Additional Journal Information:
Journal Volume: 23; Journal Issue: 22; Journal ID: ISSN 1463-9262
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; lignin; polyurethane foam; polyol; reactivity; microstructure; mechanical properties; thermal insulation

Citation Formats

Haridevan, Hima, Evans, David A. C., Ragauskas, Arthur J., Martin, Darren J., and Annamalai, Pratheep K. Valorisation of technical lignin in rigid polyurethane foam: A critical evaluation on trends, guidelines and future perspectives. United States: N. p., 2021. Web. doi:10.1039/d1gc02744a.
Haridevan, Hima, Evans, David A. C., Ragauskas, Arthur J., Martin, Darren J., & Annamalai, Pratheep K. Valorisation of technical lignin in rigid polyurethane foam: A critical evaluation on trends, guidelines and future perspectives. United States. https://doi.org/10.1039/d1gc02744a
Haridevan, Hima, Evans, David A. C., Ragauskas, Arthur J., Martin, Darren J., and Annamalai, Pratheep K. Tue . "Valorisation of technical lignin in rigid polyurethane foam: A critical evaluation on trends, guidelines and future perspectives". United States. https://doi.org/10.1039/d1gc02744a. https://www.osti.gov/servlets/purl/1844864.
@article{osti_1844864,
title = {Valorisation of technical lignin in rigid polyurethane foam: A critical evaluation on trends, guidelines and future perspectives},
author = {Haridevan, Hima and Evans, David A. C. and Ragauskas, Arthur J. and Martin, Darren J. and Annamalai, Pratheep K.},
abstractNote = {Lignin is one of the most abundant aromatic natural polymers. Produced as a by-product from the biomass refinery industries, lignin remains largely underutilised in high-value industrial applications. The incorporation of lignin in rigid polyurethane foam (RPUF) has been the focus of much research, due to its potential to replace fossil fuel-based components of RPUF. However, the overall sustainability of RPUF depends on numerous factors including processability, cost-effectiveness, and retention of performance throughout the service life. To date, the incorporation of lignin has been explored either as filler particles (through direct incorporation) or as a blendable liquid polyol introduced after chemical modifications (such as oxyalkylation, functionalisation, or depolymerisation). However, the production of lignin incorporated foam with high performance through cost-effective processing is still an ongoing challenge. Herein, this review critically appraises the progress on the effective incorporation of lignin in RPUF. Firstly, this review briefly covers the essential raw materials, formulation, important properties, and sustainability aspects of RPUF for industrial applications. Secondly, it provides insights on the key parameters of lignin of relevance to incorporation into RPUF. Thirdly, it benchmarks the reported studies on incorporation of lignin in RPUF systems by evaluating their important properties and proposes potential strategies for addressing the key challenges in the incorporation of lignin in RPUF. By bridging the gaps that exist in the literature on the utilisation of lignin in RPUF this account will serve as a resource for both beginners and professionals in the polyurethane and biorefinery industries towards the successful development of lignin incorporated RPUF for industrial applications},
doi = {10.1039/d1gc02744a},
journal = {Green Chemistry},
number = 22,
volume = 23,
place = {United States},
year = {Tue Oct 12 00:00:00 EDT 2021},
month = {Tue Oct 12 00:00:00 EDT 2021}
}

Works referenced in this record:

The Influence of Pulping Conditions on the Structure of Acetosolv Eucalyptus Lignins
journal, February 1997

  • Vázquez, Gonzalo; Antorrena, Gervasio; González, Julia
  • Journal of Wood Chemistry and Technology, Vol. 17, Issue 1-2
  • DOI: 10.1080/02773819708003124

Thermal and Mechanical Properties of Sodium Lignosulfonate-based Rigid Polyurethane Foams Prepared with Three Kinds of Polyols
journal, January 2003

  • Asano, Yasuhiro; Hatakeyama, Hyoe; Hatakeyama, Tatsuko
  • Sen'i Gakkaishi, Vol. 59, Issue 12
  • DOI: 10.2115/fiber.59.465

Bright Side of Lignin Depolymerization: Toward New Platform Chemicals
journal, January 2018


Lignin Prepared by Ultrafiltration of Black Liquor: Investigation of Solubility, Viscosity, and Ash Content
journal, February 2016


Theory, practice and prospects of X-ray and neutron scattering for lignocellulosic biomass characterization: towards understanding biomass pretreatment
journal, January 2015

  • Cheng, Gang; Zhang, Xin; Simmons, Blake
  • Energy & Environmental Science, Vol. 8, Issue 2
  • DOI: 10.1039/C4EE03147D

PU foam derived from renewable sources: Perspective on properties enhancement: An overview
journal, October 2017


Solvent screening for the fractionation of industrial kraft lignin
journal, January 2016

  • Duval, Antoine; Vilaplana, Francisco; Crestini, Claudia
  • Holzforschung, Vol. 70, Issue 1
  • DOI: 10.1515/hf-2014-0346

Dry fractionation process as an important step in current and future lignocellulose biorefineries: A review
journal, April 2013


Oxypropylation of Lignins and Preparation of Rigid Polyurethane Foams from the Ensuing Polyols
journal, October 2005

  • Nadji, Hamid; Bruzzèse, Cécile; Belgacem, Mohamed Naceur
  • Macromolecular Materials and Engineering, Vol. 290, Issue 10
  • DOI: 10.1002/mame.200500200

Production and characterization of polyurethane foams from a simple mixture of castor oil, crude glycerol and untreated lignin as bio-based polyols
journal, December 2016


Novel Rigid Polyisocyanurate Foams from Synthesized Biobased Polyester Polyol with Enhanced Properties
journal, March 2018

  • Furtwengler, Pierre; Matadi Boumbimba, Rodrigue; Sarbu, Alexandru
  • ACS Sustainable Chemistry & Engineering, Vol. 6, Issue 5
  • DOI: 10.1021/acssuschemeng.8b00380

Tomographic Reconstruction and Morphological Analysis of Rigid Polyurethane Foams
journal, February 2016

  • Nistor, Andra; Toulec, Miloš; Zubov, Alexandr
  • Macromolecular Symposia, Vol. 360, Issue 1
  • DOI: 10.1002/masy.201500113

Depolymerization of lignins and their applications for the preparation of polyols and rigid polyurethane foams: A review
journal, July 2016

  • Mahmood, Nubla; Yuan, Zhongshun; Schmidt, John
  • Renewable and Sustainable Energy Reviews, Vol. 60
  • DOI: 10.1016/j.rser.2016.01.037

Development of high-performance biodegradable rigid polyurethane foams using all bioresource-based polyols: Lignin and soy oil-derived polyols
journal, August 2018


Spent coffee grounds as a renewable source for ecopolyols production: Spent coffee grounds: a renewable source for ecopolyols
journal, July 2014

  • Soares, Belinda; Gama, Nuno; Freire, Carmen S. R.
  • Journal of Chemical Technology & Biotechnology, Vol. 90, Issue 8
  • DOI: 10.1002/jctb.4457

Isolation and characterization of lignins from Eucalyptus grandis Hill ex Maiden and Eucalyptus globulus Labill. by enzymatic mild acidolysis (EMAL)
journal, January 2008

  • Guerra, Anderson; Lucia, Lucian A.; Argyropoulos, Dimitris S.
  • Holzforschung, Vol. 62, Issue 1
  • DOI: 10.1515/HF.2008.004

A systematic study substituting polyether polyol with palm kernel oil based polyester polyol in rigid polyurethane foam
journal, April 2015


Perspective on Technical Lignin Fractionation
journal, May 2020


Lignin-Derived Carbon Fiber as a Co-Product of Refining Cellulosic Biomass
journal, January 2014

  • Langholtz, Matthew; Downing, Mark; Graham, Robin
  • SAE International Journal of Materials and Manufacturing, Vol. 7, Issue 1
  • DOI: 10.4271/2013-01-9092

Recent innovations in analytical methods for the qualitative and quantitative assessment of lignin
journal, September 2015

  • Lupoi, Jason S.; Singh, Seema; Parthasarathi, Ramakrishnan
  • Renewable and Sustainable Energy Reviews, Vol. 49
  • DOI: 10.1016/j.rser.2015.04.091

Molecular Weight Distribution of (Semi-) Commercial Lignin Derivatives
journal, December 1993

  • Glasser, Wolfgang G.; Davé, Vipul; Frazier, Charles E.
  • Journal of Wood Chemistry and Technology, Vol. 13, Issue 4
  • DOI: 10.1080/02773819308020533

Lignin-derived bio-based flame retardants toward high-performance sustainable polymeric materials
journal, January 2020

  • Yang, Haitang; Yu, Bin; Xu, Xiaodong
  • Green Chemistry, Vol. 22, Issue 7
  • DOI: 10.1039/D0GC00449A

Polyol Preparation by Liquefaction of Technical Lignins in Crude Glycerol
journal, January 2017

  • Muller, Louis C.; Marx, Sanette; Vosloo, Hermanus C. M.
  • Journal of Renewable Materials, Vol. 5, Issue 1
  • DOI: 10.7569/JRM.2016.634130

Herstellung und Charakterisierung von Polymerhölzern auf der Basis von niedrig-viskosen Epoxidharzen
journal, January 1986


Biopolyol preparation from liquefaction of grape seeds: RESEARCH ARTICLE
journal, May 2016

  • Shao, Qiang; Li, Hong-Qiang; Huang, Chong-Pin
  • Journal of Applied Polymer Science, Vol. 133, Issue 34
  • DOI: 10.1002/app.43835

Liquefaction behaviors of bamboo residues in a glycerol-based solvent using microwave energy
journal, November 2013

  • Xie, Jiulong; Hse, Chung-Yun; Shupe, Todd F.
  • Journal of Applied Polymer Science, Vol. 131, Issue 9
  • DOI: 10.1002/app.40207

Lignin-derivatives based polymers, blends and composites: A review
journal, December 2016


Isocyanate-rich cellulose nanocrystals and their selective insertion in elastomeric polyurethane
journal, November 2011


Thermal properties of lignin-and molasses-based polyurethane foams
journal, May 2008

  • Hatakeyama, H.; Kosugi, R.; Hatakeyama, T.
  • Journal of Thermal Analysis and Calorimetry, Vol. 92, Issue 2
  • DOI: 10.1007/s10973-007-8963-1

Lignin-based foams as insulation materials: a review
journal, December 2018

  • Mimini, Vebi; Kabrelian, Vasken; Fackler, Karin
  • Holzforschung, Vol. 73, Issue 1
  • DOI: 10.1515/hf-2018-0111

Kinetic study of the formation of lignin-based polyurethanes in bulk
journal, August 2011


Characterization of Thermal and Mechanical Properties of Lignosulfonate- and Hydrolyzed Lignosulfonate-based Polyurethane Foams
journal, May 2016


A comparative life cycle assessment (LCA) of different insulation materials for buildings in the continental Mediterranean climate
journal, October 2020


Production and characterization of rigid polyurethane foam by oxypropylation of organosolv lignin extracted from exhausted olive pomace
journal, August 2020

  • Abid, Amine; Brosse, Nicolas; Ziegler-Devin, Isabelle
  • Journal of Polymer Research, Vol. 27, Issue 9
  • DOI: 10.1007/s10965-020-02228-9

Catalytic demethylation of organosolv lignin in aqueous medium using indium triflate under microwave irradiation
journal, October 2017


Chemical modification of lignins: Towards biobased polymers
journal, July 2014


Valorization of lignin in polymer and composite systems for advanced engineering applications – A review
journal, June 2019

  • Collins, Maurice N.; Nechifor, Mărioara; Tanasă, Fulga
  • International Journal of Biological Macromolecules, Vol. 131
  • DOI: 10.1016/j.ijbiomac.2019.03.069

Flexible polyurethane foams green production employing lignin or oxypropylated lignin
journal, March 2015


A review on insulation materials for energy conservation in buildings
journal, June 2017


Effect of Softwood Kraft Lignin Fractionation on the Dispersion of Multiwalled Carbon Nanotubes
journal, May 2013

  • Teng, Nai-Yu; Dallmeyer, Ian; Kadla, John F.
  • Industrial & Engineering Chemistry Research, Vol. 52, Issue 19
  • DOI: 10.1021/ie303261z

Rigid Polyurethane Foams with Various Isocyanate Indices Based on Polyols from Rapeseed Oil and Waste PET
journal, March 2020


Water absorbent polyurethane composites derived from molasses and lignin filled with microcrystalline cellulose
journal, July 2012

  • Hatakeyama, Hyoe; Kato, Naomi; Nanbo, Takashi
  • Journal of Materials Science, Vol. 47, Issue 20
  • DOI: 10.1007/s10853-012-6674-x

Systematic Review on Isolation Processes for Technical Lignin
journal, May 2021

  • Kienberger, Marlene; Maitz, Silvia; Pichler, Thomas
  • Processes, Vol. 9, Issue 5
  • DOI: 10.3390/pr9050804

Renewable Self-Blowing Non-Isocyanate Polyurethane Foams from Lysine and Sorbitol: Renewable Self-Blowing Non-Isocyanate Polyurethane Foams from Lysine and Sorbitol
journal, August 2018

  • Clark, James H.; Farmer, Thomas J.; Ingram, Ian D. V.
  • European Journal of Organic Chemistry, Vol. 2018, Issue 31
  • DOI: 10.1002/ejoc.201800665

Site-Selective Modification of Cellulose Nanocrystals with Isophorone Diisocyanate and Formation of Polyurethane-CNC Composites
journal, January 2016

  • Girouard, Natalie M.; Xu, Shanhong; Schueneman, Gregory T.
  • ACS Applied Materials & Interfaces, Vol. 8, Issue 2
  • DOI: 10.1021/acsami.5b10723

Synthesis of thermal insulating polyurethane foams from lignin and rapeseed based polyols: A comparative study
journal, January 2020


Influence of nanofillers on thermal insulating properties of polyurethane nanocomposites foams
journal, January 2007

  • Modesti, Michele; Lorenzetti, Alessandra; Besco, Stefano
  • Polymer Engineering & Science, Vol. 47, Issue 9
  • DOI: 10.1002/pen.20819

A simple process for lignin nanoparticle preparation
journal, January 2016

  • Lievonen, Miikka; Valle-Delgado, Juan José; Mattinen, Maija-Liisa
  • Green Chemistry, Vol. 18, Issue 5
  • DOI: 10.1039/C5GC01436K

Rigid polyurethane foams based on soybean oil
journal, July 2000


Oxidative upgrade of lignin – Recent routes reviewed
journal, June 2013


Oxyalkylation of lignin with propylene carbonate: Influence of reaction parameters on the ensuing bio-based polyols
journal, July 2017


Mechanical pretreatments of lignocellulosic biomass: towards facile and environmentally sound technologies for biofuels production
journal, January 2014

  • Barakat, Abdellatif; Mayer-Laigle, Claire; Solhy, Abderrahim
  • RSC Adv., Vol. 4, Issue 89
  • DOI: 10.1039/C4RA07568D

Microcellulose as a natural filler in polyurethane foams based on the biopolyol from rapeseed oil
journal, September 2016


Structure-properties relationships of cellular materials from biobased polyurethane foams
journal, July 2021


Lignin. 18. Associative effects among organosolv lignin components
journal, March 1981

  • Sarkanen, Simo; Teller, David C.; Hall, John
  • Macromolecules, Vol. 14, Issue 2
  • DOI: 10.1021/ma50003a037

A simple methodology for improving the performance and sustainability of rigid polyurethane foam by incorporating industrial lignin
journal, July 2018


Reactivity of Isocyanate-Functionalized Lignins: A Key Factor for the Preparation of Lignin-Based Polyurethanes
journal, August 2019


Lignin Functionalization through Chemical Demethylation: Preparation and Tannin-Like Properties of Demethylated Guaiacyl-Type Synthetic Lignins
journal, May 2017

  • Sawamura, Kaori; Tobimatsu, Yuki; Kamitakahara, Hiroshi
  • ACS Sustainable Chemistry & Engineering, Vol. 5, Issue 6
  • DOI: 10.1021/acssuschemeng.7b00748

Correlating lignin structural features to phase partitioning behavior in a novel aqueous fractionation of softwood Kraft black liquor
journal, January 2013

  • Stoklosa, Ryan J.; Velez, Julian; Kelkar, Shantanu
  • Green Chemistry, Vol. 15, Issue 10
  • DOI: 10.1039/c3gc41182f

Lignin in Ethylene Glycol and Poly(ethylene glycol): Fortified Lubricants with Internal Hydrogen Bonding
journal, December 2015


Lignin. 24. Ultrafiltration and light-scattering evidence for association of kraft lignins in aqueous solutions
journal, July 1988

  • Woerner, Douglas L.; McCarthy, Joseph L.
  • Macromolecules, Vol. 21, Issue 7
  • DOI: 10.1021/ma00185a048

Hydrolytic liquefaction of hydrolysis lignin for the preparation of bio-based rigid polyurethane foam
journal, January 2016

  • Mahmood, Nubla; Yuan, Zhongshun; Schmidt, John
  • Green Chemistry, Vol. 18, Issue 8
  • DOI: 10.1039/C5GC02876K

Strategies for the Conversion of Lignin to High-Value Polymeric Materials: Review and Perspective
journal, December 2015


Lignin Valorization: Improving Lignin Processing in the Biorefinery
journal, May 2014

  • Ragauskas, A. J.; Beckham, G. T.; Biddy, M. J.
  • Science, Vol. 344, Issue 6185, p. 1246843-1246843
  • DOI: 10.1126/science.1246843

Two approaches for introduction of wheat straw lignin into rigid polyurethane foams
conference, January 2014

  • Arshanitsa, A.; Paberza, A.; Vevere, L.
  • PROCEEDINGS OF PPS-29: The 29th International Conference of the Polymer Processing Society - Conference Papers, AIP Conference Proceedings
  • DOI: 10.1063/1.4873806

Uncatalyzed reactions of 4,4′-diphenylmethane-diisocyanate with polymer polyols as revealed by matrix-assisted laser desorption/ionization mass spectrometry
journal, January 2016

  • Nagy, Tibor; Antal, Borbála; Dékány-Adamoczky, Anita
  • RSC Advances, Vol. 6, Issue 52
  • DOI: 10.1039/C6RA06671B

Renewable polyols for advanced polyurethane foams from diverse biomass resources
journal, January 2018

  • Furtwengler, Pierre; Avérous, Luc
  • Polymer Chemistry, Vol. 9, Issue 32
  • DOI: 10.1039/C8PY00827B

New Process of Chemical Grafting of Cellulose Nanoparticles with a Long Chain Isocyanate
journal, January 2010

  • Siqueira, Gilberto; Bras, Julien; Dufresne, Alain
  • Langmuir, Vol. 26, Issue 1
  • DOI: 10.1021/la9028595

Structures, and Reactivities with Formaldehyde, of Some Acetosolv Pine Lignins
journal, November 1999

  • Vázquez, Gonzalo; Freire, Sonia; Rodríguez-Bona, Carlos
  • Journal of Wood Chemistry and Technology, Vol. 19, Issue 4
  • DOI: 10.1080/02773819909349617

The Solvent Properties of Liquids and Their Relation to the Solubility, Swelling, Isolation and Fractionation of Lignin
journal, October 1952

  • Schuerch, Conrad
  • Journal of the American Chemical Society, Vol. 74, Issue 20
  • DOI: 10.1021/ja01140a020

Synthesis of Lignin-Based Polyurethanes: A Mini-Review
journal, March 2019


Production and characterization of biopolyols and polyurethane foams from crude glycerol based liquefaction of soybean straw
journal, January 2012


A perspective approach to sustainable routes for non-isocyanate polyurethanes
journal, February 2017


Effect of incorporation of lignin as bio-polyol on the performance of rigid lightweight wood–polyurethane composite foams
journal, April 2020


Wheat straw lignin as filler for rigid polyurethane foams on the basis of tall oil amide
journal, June 2014


The Catalytic Valorization of Lignin for the Production of Renewable Chemicals
journal, June 2010

  • Zakzeski, Joseph; Bruijnincx, Pieter C. A.; Jongerius, Anna L.
  • Chemical Reviews, Vol. 110, Issue 6, p. 3552-3599
  • DOI: 10.1021/cr900354u

Modification of renewable resources-lignin-by three chemical methods and its applications to polyurethane foams: MODIFICATION OF LIGNIN AND ITS APPLICATIONS
journal, June 2014

  • Yang, Liu; Wang, Xiaofeng; Cui, Yao
  • Polymers for Advanced Technologies, Vol. 25, Issue 10
  • DOI: 10.1002/pat.3356

Lignin-Based Rigid Polyurethane Foam Reinforced with Pulp Fiber: Synthesis and Characterization
journal, May 2014

  • Xue, Bai-Liang; Wen, Jia-Long; Sun, Run-Cang
  • ACS Sustainable Chemistry & Engineering, Vol. 2, Issue 6
  • DOI: 10.1021/sc5001226

Cellular Solids
book, January 2014


Highly Resilient Lignin-Containing Polyurethane Foam
journal, December 2018

  • Wang, Shengyu; Liu, Weifeng; Yang, Dongjie
  • Industrial & Engineering Chemistry Research, Vol. 58, Issue 1
  • DOI: 10.1021/acs.iecr.8b05072

Lignin-based rigid polyurethane foams with improved biodegradation
journal, September 2013

  • Cateto, Carolina A.; Barreiro, Maria F.; Ottati, Carolina
  • Journal of Cellular Plastics, Vol. 50, Issue 1
  • DOI: 10.1177/0021955X13504774

Lab-scale structural insulated panels with lignin-incorporated rigid polyurethane foams as core
journal, June 2019


Preparation of Lignopolyols from Wheat Straw Soda Lignin
journal, September 2011

  • Ahvazi, Behzad; Wojciechowicz, Olivia; Ton-That, Tan-Minh
  • Journal of Agricultural and Food Chemistry, Vol. 59, Issue 19
  • DOI: 10.1021/jf202452m

Efficient dissolution of lignin in novel ternary deep eutectic solvents and its application in polyurethane
journal, December 2020


Polyurethane Coatings Based on Chemically Unmodified Fractionated Lignin
journal, April 2015

  • Griffini, Gianmarco; Passoni, Valeria; Suriano, Raffaella
  • ACS Sustainable Chemistry & Engineering, Vol. 3, Issue 6
  • DOI: 10.1021/acssuschemeng.5b00073

Solvent Pretreatment of Lignin for Obtaining of low Viscosity Lignopolyols by Oxypropylation for Synthesis of Polyurethanes
journal, January 2016

  • Jablonskis, A.; Arshanitsa, A.; Telysheva, G.
  • IOP Conference Series: Materials Science and Engineering, Vol. 111
  • DOI: 10.1088/1757-899X/111/1/012007

Kraft Lignin-Based Rigid Polyurethane Foam
journal, July 2012


Lignin as a reactive reinforcing filler for water-blown rigid biofoam composites from soy oil-based polyurethane
journal, May 2013


From lignin subunits to aggregates: insights into lignin solubilization
journal, January 2017

  • Zhao, Wenwen; Xiao, Ling-Ping; Song, Guoyong
  • Green Chemistry, Vol. 19, Issue 14
  • DOI: 10.1039/C7GC00944E

Synthesis of lignin-based polyurethane foam extracted from black liquor waste
conference, January 2020

  • Mardiyati, Y.; Prabaswara, Enggar Abimantrana; Steven, S.
  • THE 4TH INDOMS INTERNATIONAL CONFERENCE ON MATHEMATICS AND ITS APPLICATION (IICMA 2019), AIP Conference Proceedings
  • DOI: 10.1063/5.0015851

Development of Lignin and Nanocellulose Enhanced Bio PU Foams for Automotive Parts
journal, November 2013

  • Faruk, Omar; Sain, Mohini; Farnood, Ramin
  • Journal of Polymers and the Environment, Vol. 22, Issue 3
  • DOI: 10.1007/s10924-013-0631-x

Comparative analysis of building insulation material properties and performance
journal, October 2020

  • Kumar, Dileep; Alam, Morshed; Zou, Patrick X. W.
  • Renewable and Sustainable Energy Reviews, Vol. 131
  • DOI: 10.1016/j.rser.2020.110038

High bio-content polyurethane composites with urethane modified lignin as filler
journal, July 2015


Fractionation of Industrial Softwood Kraft Lignin: Solvent Selection as a Tool for Tailored Material Properties
journal, February 2016

  • Passoni, Valeria; Scarica, Carmela; Levi, Marinella
  • ACS Sustainable Chemistry & Engineering, Vol. 4, Issue 4
  • DOI: 10.1021/acssuschemeng.5b01722

The microstructure of rigid polyurethane foams
journal, January 1982

  • Dawson, J. R.; Shortall, J. B.
  • Journal of Materials Science, Vol. 17, Issue 1
  • DOI: 10.1007/BF00809056

LignoForce System for the Recovery of Lignin from Black Liquor: Feedstock Options, Odor Profile, and Product Characterization
journal, August 2016


Recycling and Disposal Methods for Polyurethane Foam Wastes
journal, January 2012


Recovering ultraclean lignins of controlled molecular weight from Kraft black-liquor lignins
journal, January 2015

  • Klett, A. S.; Chappell, P. V.; Thies, M. C.
  • Chemical Communications, Vol. 51, Issue 64
  • DOI: 10.1039/C5CC05341B

Potential use of black liquor as lignin source for synthesis of polyurethane foam
journal, November 2020


Mechanical, morphological, and thermal properties of rigid polyurethane foams blown by distilled water
journal, July 2003

  • Seo, W. J.; Jung, H. C.; Hyun, J. C.
  • Journal of Applied Polymer Science, Vol. 90, Issue 1
  • DOI: 10.1002/app.12238

Polyurethane/clay nanocomposites foams: processing, structure and properties
journal, January 2005


Properties of Rigid Polyurethane Foams with Blowing Agents and Catalysts
journal, May 2004

  • Choe, Kun Hyung; Lee, Dong Soo; Seo, Won Jin
  • Polymer Journal, Vol. 36, Issue 5
  • DOI: 10.1295/polymj.36.368

Rigid polyurethane foams containing lignin oxyalkylated with ethylene carbonate and polyethylene glycol
journal, December 2019


Production of Bio-based Polyol from Oxypropylated Pyrolytic Lignin for Rigid Polyurethane Foam Application
journal, November 2019

  • Saffar, Thana; Bouafif, Hassine; Braghiroli, Flavia Lega
  • Waste and Biomass Valorization, Vol. 11, Issue 11
  • DOI: 10.1007/s12649-019-00876-7

Influence of lithium chloride on the morphology of flexible slabstock polyurethane foams and their plaque counterparts
journal, January 2003


Investigation of Aggregation and Assembly of Alkali Lignin Using Iodine as a Probe
journal, April 2011

  • Deng, Yonghong; Feng, Xinjia; Zhou, Mingsong
  • Biomacromolecules, Vol. 12, Issue 4
  • DOI: 10.1021/bm101449b

Flammability reduction of flexible polyurethane foams via carbon nanofiber network formation
journal, January 2008

  • Zammarano, Mauro; Krämer, Roland H.; Harris, Richard
  • Polymers for Advanced Technologies, Vol. 19, Issue 6
  • DOI: 10.1002/pat.1111

Effect of replacing polyol by organosolv and kraft lignin on the property and structure of rigid polyurethane foam
journal, January 2013


Polymer nanocomposite foams
journal, December 2005


Lignin Refinery: Towards the Preparation of Renewable Aromatic Building Blocks
journal, December 2015

  • Graglia, Micaela; Kanna, Narasimharao; Esposito, Davide
  • ChemBioEng Reviews, Vol. 2, Issue 6
  • DOI: 10.1002/cben.201500019

Dispersion Methodology for Technical Lignin into Polyester Polyol for High-Performance Polyurethane Insulation Foam
journal, June 2021

  • Haridevan, Hima; McLaggan, Martyn S.; Evans, David A. C.
  • ACS Applied Polymer Materials, Vol. 3, Issue 7
  • DOI: 10.1021/acsapm.1c00430

Review of life cycle assessments of lignin and derived products: Lessons learned
journal, May 2021


Lignin Functionalization for the Production of Novel Materials
journal, May 2020


Recycling of rigid polyurethane foam: Micro‐milled powder used as active filler in polyurethane adhesives
journal, February 2020

  • Beran, Rudolf; Zarybnicka, Lucie; Machova, Dita
  • Journal of Applied Polymer Science, Vol. 137, Issue 37
  • DOI: 10.1002/app.49095

Spherical lignin particles: a review on their sustainability and applications
journal, January 2020

  • Österberg, Monika; Sipponen, Mika H.; Mattos, Bruno D.
  • Green Chemistry, Vol. 22, Issue 9
  • DOI: 10.1039/D0GC00096E

A brief overview on lignin dissolution
journal, September 2018


Polyurethanes: Versatile Materials and Sustainable Problem Solvers for Today’s Challenges
journal, July 2013

  • Engels, Hans-Wilhelm; Pirkl, Hans-Georg; Albers, Reinhard
  • Angewandte Chemie International Edition, Vol. 52, Issue 36
  • DOI: 10.1002/anie.201302766

Chemistry of Aryl Isocyanates: Rate and Equilibrium Constants for the Formation of Ethyl α,γ-Diarylallophanate
journal, January 1959


Sustainable rigid polyurethane foams based on recycled polyols from chemical recycling of waste polyurethane foams
journal, May 2019

  • Shin, Se‐Ra; Kim, Han‐Na; Liang, Jing‐Yu
  • Journal of Applied Polymer Science, Vol. 136, Issue 35
  • DOI: 10.1002/app.47916

Fractionation of lignocellulosic biomass to produce uncondensed aldehyde-stabilized lignin
journal, February 2019

  • Talebi Amiri, Masoud; Dick, Graham R.; Questell-Santiago, Ydna M.
  • Nature Protocols, Vol. 14, Issue 3
  • DOI: 10.1038/s41596-018-0121-7

Reactivity of Aliphatic and Phenolic Hydroxyl Groups in Kraft Lignin towards 4,4′ MDI
journal, April 2021

  • Antonino, Leonardo Dalseno; Gouveia, Júlia Rocha; de Sousa Júnior, Rogério Ramos
  • Molecules, Vol. 26, Issue 8
  • DOI: 10.3390/molecules26082131

Fractionation and concentration of kraft black liquor lignin with ultrafiltration
journal, April 2003


New insights into the structure and composition of technical lignins: a comparative characterisation study
journal, January 2016

  • Constant, Sandra; Wienk, Hans L. J.; Frissen, Augustinus E.
  • Green Chemistry, Vol. 18, Issue 9
  • DOI: 10.1039/C5GC03043A

From lignin association to nano-/micro-particle preparation: extracting higher value of lignin
journal, January 2016

  • Zhao, Wenwen; Simmons, Blake; Singh, Seema
  • Green Chemistry, Vol. 18, Issue 21
  • DOI: 10.1039/C6GC01813K

Optimization Study of Lignin Oxypropylation in View of the Preparation of Polyurethane Rigid Foams
journal, March 2009

  • Cateto, Carolina Andreia; Barreiro, Maria Filomena; Rodrigues, Alírio Egídio
  • Industrial & Engineering Chemistry Research, Vol. 48, Issue 5
  • DOI: 10.1021/ie801251r

Bio-Polyurethane Foams Modified with a Mixture of Bio-Polyols of Different Chemical Structures
journal, July 2021

  • Prociak, Aleksander; Kurańska, Maria; Uram, Katarzyna
  • Polymers, Vol. 13, Issue 15
  • DOI: 10.3390/polym13152469

Effect of isocyanate index on the properties of rigid polyurethane foams blown by HFC 365mfc
journal, July 2008

  • Kim, Sung Hee; Kim, Byung Kyu; Lim, Ho
  • Macromolecular Research, Vol. 16, Issue 5
  • DOI: 10.1007/BF03218546

On the solution structure of kraft lignin in ethylene glycol and its implication for nanoparticle preparation
journal, January 2019

  • Yang, Mingkun; Zhao, Wenwen; Singh, Seema
  • Nanoscale Advances, Vol. 1, Issue 1
  • DOI: 10.1039/C8NA00042E

Bio-based polyurethane prepared from Kraft lignin and modified castor oil
journal, January 2016


Bio-Based Rigid Polyurethane Foam from Liquefied Products of Wood in the Presence of Polyhydric Alcohols
journal, December 2010


Lignin. 19. Kraft lignin component conformation and associated complex configuration in aqueous alkaline solution
journal, July 1982

  • Sarkanen, Simo; Teller, David C.; Abramowski, Edward
  • Macromolecules, Vol. 15, Issue 4
  • DOI: 10.1021/ma00232a027

Evaluation of industrial lignins for biocomposites production
journal, January 2014


Effect of foam density on the properties of water blown rigid polyurethane foam
journal, January 2008

  • Thirumal, M.; Khastgir, Dipak; Singha, Nikhil K.
  • Journal of Applied Polymer Science, Vol. 108, Issue 3, p. 1810-1817
  • DOI: 10.1002/app.27712

Polyurethane types, synthesis and applications – a review
journal, January 2016

  • Akindoyo, John O.; Beg, M. D. H.; Ghazali, Suriati
  • RSC Advances, Vol. 6, Issue 115
  • DOI: 10.1039/C6RA14525F

Performance characterization of rigid polyurethane foam with refined alkali lignin and modified alkali lignin
journal, May 2009


Towards lignin-based functional materials in a sustainable world
journal, January 2016

  • Kai, Dan; Tan, Mein Jin; Chee, Pei Lin
  • Green Chemistry, Vol. 18, Issue 5
  • DOI: 10.1039/C5GC02616D

Global lignin supply overview and kraft lignin potential as an alternative for petroleum-based polymers
journal, May 2020

  • Dessbesell, Luana; Paleologou, Michael; Leitch, Mathew
  • Renewable and Sustainable Energy Reviews, Vol. 123
  • DOI: 10.1016/j.rser.2020.109768

Lignin depolymerisation strategies: towards valuable chemicals and fuels
journal, January 2014

  • Xu, Chunping; Arancon, Rick Arneil D.; Labidi, Jalel
  • Chemical Society Reviews, Vol. 43, Issue 22, p. 7485-7500
  • DOI: 10.1039/C4CS00235K

Effects of Surface Functionalization of Lignin on Synthesis and Properties of Rigid Bio-Based Polyurethanes Foams
journal, June 2018


Cyclic Carbonates as Safe and Versatile Etherifying Reagents for the Functionalization of Lignins and Tannins
journal, July 2017


Recent Advances In Isocyanate Chemistry
journal, February 1957

  • Arnold, R. G.; Nelson, J. A.; Verbanc, J. J.
  • Chemical Reviews, Vol. 57, Issue 1
  • DOI: 10.1021/cr50013a002

The colloidal behaviour of kraft lignin and lignosulfonates
journal, January 1986


Lignin. 20. Associative interactions between kraft lignin components
journal, December 1984

  • Sarkanen, Simo; Teller, David C.; Stevens, Clyde R.
  • Macromolecules, Vol. 17, Issue 12
  • DOI: 10.1021/ma00142a022

Fractionation and oxypropylation of corn-stover lignin for the production of biobased rigid polyurethane foam
journal, January 2020


A concise review of current lignin production, applications, products and their environmental impact
journal, November 2019


Mechanical properties and morphology of nano-reinforced rigid PU foam
journal, January 2011

  • Dolomanova, Viktoriya; Rauhe, Jens Chr. M.; Jensen, Lars Rosgaard
  • Journal of Cellular Plastics, Vol. 47, Issue 1
  • DOI: 10.1177/0021955X10392200

On the propensity of lignin to associate: A size exclusion chromatography study with lignin derivatives isolated from different plant species
journal, October 2007


Bio-based polyurethane foam preparation employing lignin from corn stalk enzymatic hydrolysis residues
journal, January 2018


Microstructure and Tensile Mechanical Properties of Anisotropic Rigid Polyurethane Foam
journal, April 2008


New Opportunities in the Valorization of Technical Lignins
journal, January 2021

  • Balakshin, Mikhail Yu.; Capanema, Ewellyn A.; Sulaeva, Irina
  • ChemSusChem, Vol. 14, Issue 4
  • DOI: 10.1002/cssc.202002553

Glass transition temperature of polyurethane foams derived from lignin by controlled reaction rate
journal, April 2013

  • Hatakeyama, Hyoe; Hirogaki, Ayako; Matsumura, Hiroshi
  • Journal of Thermal Analysis and Calorimetry, Vol. 114, Issue 3
  • DOI: 10.1007/s10973-013-3132-1

Soy-based polyurethane spray foam insulations for light weight wall panels and their performances under monotonic and static cyclic shear forces
journal, November 2015


Lignin‐Based Polyurethane: Recent Advances and Future Perspectives
journal, November 2020

  • Ma, Xiaozhen; Chen, Jing; Zhu, Jin
  • Macromolecular Rapid Communications, Vol. 42, Issue 3
  • DOI: 10.1002/marc.202000492

Lignin-based carbon fibers for renewable and multifunctional lithium-ion battery electrodes
journal, September 2017

  • Nowak, Andrzej P.; Hagberg, Johan; Leijonmarck, Simon
  • Holzforschung, Vol. 72, Issue 2
  • DOI: 10.1515/hf-2017-0044

Preparative fractionation of lignin by gel-permeation chromatography
journal, February 1969


Bio-based polyurethane foams toward applications beyond thermal insulation
journal, July 2015


Fractionation and Characterization of Kraft Lignin by Sequential Precipitation with Various Organic Solvents
journal, December 2016


Effect of Ionic Liquid Treatment on the Structures of Lignins in Solutions: Molecular Subunits Released from Lignin
journal, August 2012

  • Cheng, Gang; Kent, Michael S.; He, Lilin
  • Langmuir, Vol. 28, Issue 32
  • DOI: 10.1021/la300938b

Lignin utilization: A review of lignin depolymerization from various aspects
journal, June 2019


Methanol Fractionation of Softwood Kraft Lignin: Impact on the Lignin Properties
journal, November 2013

  • Saito, Tomonori; Perkins, Joshua H.; Vautard, Frederic
  • ChemSusChem, Vol. 7, Issue 1
  • DOI: 10.1002/cssc.201300509

A New Class of Renewable Thermoplastics with Extraordinary Performance from Nanostructured Lignin-Elastomers
journal, March 2016

  • Tran, Chau D.; Chen, Jihua; Keum, Jong K.
  • Advanced Functional Materials, Vol. 26, Issue 16, p. 2677-2685
  • DOI: 10.1002/adfm.201504990

Liquefaction of Lignin Using Chemical Decomposition and Its Application to Polyurethane Foam
journal, April 2021


Biopolyols obtained via microwave-assisted liquefaction of lignin: structure, rheological, physical and thermal properties
journal, February 2018

  • Gosz, Kamila; Kosmela, Paulina; Hejna, Aleksander
  • Wood Science and Technology, Vol. 52, Issue 3
  • DOI: 10.1007/s00226-018-0991-4

Improved mechanical property, thermal performance, flame retardancy and fire behavior of lignin-based rigid polyurethane foam nanocomposite
journal, February 2015

  • Gao, Liping; Zheng, Guangyao; Zhou, Yonghong
  • Journal of Thermal Analysis and Calorimetry, Vol. 120, Issue 2
  • DOI: 10.1007/s10973-015-4434-2

Solubility and fractionation of Indulin AT kraft lignin in ethanol-water media
journal, January 2019


Properties and chemical modifications of lignin: Towards lignin-based nanomaterials for biomedical applications
journal, April 2018


Recent advances in vegetable oil-based polymers and their composites
journal, August 2017


Synthesis of lignin-based polyurethane/graphene oxide foam and its application as an absorbent for oil spill clean-ups and recovery
journal, September 2017


Polymer/lignin blends: Interactions, properties, applications
journal, August 2017


Analytical methods for determining functional groups in various technical lignins
journal, August 2007


Effect of Lignin Content as Bio‐Chain Extender in Polyurethane Foam
journal, June 2020

  • KUstiyah, Elvi; Putra, Dwiki Syahbana; Gerry, David
  • Macromolecular Symposia, Vol. 391, Issue 1
  • DOI: 10.1002/masy.201900153

Graphene/Polyurethane Nanocomposites for Improved Gas Barrier and Electrical Conductivity
journal, June 2010

  • Kim, Hyunwoo; Miura, Yutaka; Macosko, Christopher W.
  • Chemistry of Materials, Vol. 22, Issue 11
  • DOI: 10.1021/cm100477v

Polyurethanes from Alcell® lignin
journal, January 1997


Aqueous acetone fractionation of kraft, organosolv and soda lignins
journal, January 2018

  • Domínguez-Robles, Juan; Tamminen, Tarja; Liitiä, Tiina
  • International Journal of Biological Macromolecules, Vol. 106
  • DOI: 10.1016/j.ijbiomac.2017.08.102

Ethanol organosolv lignin-based rigid polyurethane foam reinforced with cellulose nanowhiskers
journal, January 2012


The use of cellulose nanocrystals to enhance the thermal insulation properties and sustainability of rigid polyurethane foam
journal, November 2017


Production of polyols via direct hydrolysis of kraft lignin: Effect of process parameters
journal, July 2013


Propensity of Lignin to Associate: Light Scattering Photometry Study with Native Lignins
journal, December 2008

  • Contreras, Sofía; Gaspar, Armindo R.; Guerra, Anderson
  • Biomacromolecules, Vol. 9, Issue 12
  • DOI: 10.1021/bm800673a

Lignin nanocomposites
journal, April 2016


Small-Angle X-ray Scattering and Rheological Characterization of Aqueous Lignosulfonate Solutions
journal, August 2008

  • Vainio, Ulla; Lauten, Rolf Andreas; Serimaa, Ritva
  • Langmuir, Vol. 24, Issue 15
  • DOI: 10.1021/la800479k

Gel Chromatography and Association Complexes of Lignin
journal, January 1980


Lignosulfonate/APP IFR and its flame retardancy in lignosulfonate-based rigid polyurethane foams
journal, February 2018


Unlocking the potential of a sleeping giant: lignins as sustainable raw materials for renewable fuels, chemicals and materials
journal, January 2015

  • Bruijnincx, Pieter C. A.; Rinaldi, Roberto; Weckhuysen, Bert M.
  • Green Chemistry, Vol. 17, Issue 11
  • DOI: 10.1039/C5GC90055G

Technical lignin and its potential modification routes: A mini-review
journal, October 2020


Polyurethane-graphene nanocomposite foams with enhanced thermal insulating properties: Polyurethane-graphene Nanocomposite Foams
journal, August 2015

  • Lorenzetti, Alessandra; Roso, Martina; Bruschetta, Andrea
  • Polymers for Advanced Technologies, Vol. 27, Issue 3
  • DOI: 10.1002/pat.3635

Lignins as macromonomers for polyurethane synthesis: A comparative study on hydroxyl group determination
journal, January 2008

  • Cateto, Carolina Andreia; Barreiro, Maria Filomena; Rodrigues, Alírio Egídio
  • Journal of Applied Polymer Science, Vol. 109, Issue 5
  • DOI: 10.1002/app.28393

Acid–base-catalyzed two-step liquefaction of empty fruit bunch lignin residue for preparation of biopolyol and high-performance biopolyurethanes
journal, February 2021


Morphology of Dry Lignins and Size and Shape of Dissolved Kraft Lignin Particles by X-ray Scattering
journal, October 2004

  • Vainio, Ulla; Maximova, Natalia; Hortling, Bo
  • Langmuir, Vol. 20, Issue 22
  • DOI: 10.1021/la048407v

Temperature Effects on the Molecular Properties of Liquid Lignin Recovered from Kraft Black Liquor
journal, May 2015

  • Velez, Julian; Thies, Mark C.
  • ACS Sustainable Chemistry & Engineering, Vol. 3, Issue 6
  • DOI: 10.1021/sc500703m

A review on lignin-based polymeric, micro- and nano-structured materials
journal, December 2014


Recent advances in lignin-based polyurethanes
journal, January 2017

  • Wang, Yun-Yan; Cai, Charles; Ragauskas, Arthur
  • TAPPI Journal, Vol. 16, Issue 04
  • DOI: 10.32964/TJ16.4.203

Formulation, Preparation, and Characterization of Polyurethane Foams
journal, January 2010

  • Pinto, Moisés L.
  • Journal of Chemical Education, Vol. 87, Issue 2
  • DOI: 10.1021/ed8000599

Lignin for Bioeconomy: The Present and Future Role of Technical Lignin
journal, December 2020

  • Ekielski, Adam; Mishra, Pawan Kumar
  • International Journal of Molecular Sciences, Vol. 22, Issue 1
  • DOI: 10.3390/ijms22010063

Identification of Oligomers in the Reaction of Polyols with Isocyanates by 13 C-NMR and GPC
journal, March 1986

  • Šebenik, A.; Osredkar, U.; Vizovišek, I.
  • Journal of Macromolecular Science: Part A - Chemistry, Vol. 23, Issue 3
  • DOI: 10.1080/00222338608063400

Analytical protocols for characterisation of sulphur-free lignin
journal, May 2004


Characterization of Lignins Isolated from Industrial Residues and their Beneficial Uses
journal, August 2016


Effect of functionalized lignin on the properties of lignin–isocyanate prepolymer blends and composites
journal, March 2014