Fractionated and purified hybrid poplar lignins as a polyol replacement in rigid polyurethane/polyisocyanurate foams

Henry, Christián; Tindall, Graham; Thies, Mark C.; Nejad, Mojgan

doi:10.1002/app.54648

Fractionated and purified hybrid poplar lignins as a polyol replacement in rigid polyurethane/polyisocyanurate foams

Journal Article · Sat Sep 02 04:00:00 EDT 2023 · Journal of Applied Polymer Science

DOI:https://doi.org/10.1002/app.54648· OSTI ID:2004978

Henry, Christián ^[1]; Tindall, Graham ^[2]; Thies, Mark C. ^[2]; ^[3]

Michigan State University, East Lansing, MI (United States); Clemson University
Clemson University, SC (United States)
Michigan State University, East Lansing, MI (United States)

This study introduces fractionated lignin as an innovative component in the formulation of rigid polyurethane/polyisocyanurate (PUR/PIR) foams. Low-density PUR/PIR rigid foams were prepared by replacing 80% of the petrochemical-based polyol with a hybrid poplar (HP) lignin, recovered via alkaline pretreatment, and also with a fraction of this lignin, isolated via the Aqueous Lignin Purification with Hot Agents (ALPHA) process. The as-recovered HP and ALPHA-fractionated HP lignins were characterized to determine hydroxyl content, molecular weight (Mw) distribution, and pH. Both lignin-based foams met minimum standard requirements in terms of closed cell content, compression strength, and thermal conductivity. Notably, the foams made with ALPHA-based lignin outperformed the as-recovered lignin-based foams in all measured foam properties. Moreover, the ALPHA-based foam had comparable performance to the control foam (without lignin) except for density and even surpassed the control foam in closed cell content and compressive strength. This investigation of the molecular properties of lignin suggests that significant reductions in lignin average molecular weight and polydispersity (PDI) can positively impact the properties of lignin-based rigid foams.

View Accepted Manuscript (DOE)

Research Organization:: Clemson University, SC (United States); Michigan State University, East Lansing, MI (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Bioenergy Technologies Office (BETO)

Grant/Contract Number:: EE0008502

OSTI ID:: 2004978

Alternate ID(s):: OSTI ID: 2006567

Journal Information:: Journal of Applied Polymer Science, Journal Name: Journal of Applied Polymer Science Journal Issue: 45 Vol. 140; ISSN 0021-8995

Publisher:: WileyCopyright Statement

Country of Publication:: United States

Language:: English

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Fractionated and purified hybrid poplar lignins as a polyol replacement in rigid polyurethane/polyisocyanurate foams

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