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Title: 3D printing of lignin: Challenges, opportunities and roads onward

Journal Article · · Biopolymers
DOI:https://doi.org/10.1002/bip.23431· OSTI ID:1786228
 [1];  [2];  [3];  [4];  [2];  [3];  [1]
  1. Chair of Forest Biomaterials, Faculty of Environment and Natural Resources Albert Ludwig University of Freiburg Freiburg im Br. Germany, Freiburg Materials Research Center Albert Ludwig University of Freiburg Freiburg im Br. Germany
  2. Department of Agricultural and Biological Engineering The Pennsylvania State University University Park Pennsylvania USA
  3. Carbon and Composites Group, Chemical Sciences Division Oak Ridge National Laboratory Oak Ridge Tennessee USA
  4. Department of Sustainable Biomaterials Virginia Tech Blacksburg Virginia USA

As the second most abundant biopolymer on earth, and as a resource recently becoming more available in separated and purified form on an industrial scale due to the development of new isolation technologies, lignin has a key role to play in transitioning our material industry towards sustainability. Additive manufacturing (AM), the most efficient-material processing technology to date, has likewise made great strides to promote sustainable industrial solutions to our needs in engineered products. Bringing lignin research to AM has prompted the emergence of the nascent “lignin 3D printing” field. This review presents the recent state of art of this promising field and highlights its challenges and opportunities. Following a review of the industrial availability, molecular attributes, and associated properties of technical lignins, we review R&D efforts at implementing lignin systems in extrusion-based and stereolithography (SLA) printing technologies. Doing so underlines the adage of lignin research that “all lignins are not created equal,” and stresses the opportunity nested in this chemical diversity created mostly by differences in isolation conditions to molecularly select and tune the attributes of technical lignin systems towards desirable properties, be it by modification or polymer blending. Considering the AM design process in its entirety, we finally propose onward routes to bring the full potential to this emerging field. We hope that this review can help promote the unique value and overdue industrial role of lignin in sustainable engineered materials and products.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE); USDA
Grant/Contract Number:
DE‐AC05‐00OR22725; AC05‐00OR22725; PEN04671; 1017582; AC05-00OR22725
OSTI ID:
1786228
Alternate ID(s):
OSTI ID: 1786229; OSTI ID: 1797896; OSTI ID: 1807232
Journal Information:
Biopolymers, Journal Name: Biopolymers Vol. 112 Journal Issue: 6; ISSN 0006-3525
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
United States
Language:
English

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