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Title: High-Performance Resin Formulations with Ozone-Pretreated Corn Cob Lignin and Lysine
Non-toxic resins formulated with renewable components have been receiving increased attention as sustainable alternatives to petroleum-based resins. In this work, we demonstrate a new class of lignin-amino acid (LA) resins, formulated with non-toxic components that are abundant and can be renewably sourced from field leftovers (corn cobs) and lysine (from bio-based sugars). NMR (1H, 31P, 13C-1H HSQC, 15N-1H HSQC, and 15N-1H HMBC), FTIR, thermogravimetric, gel permeation chromatography and elemental analyses provide insights into the physicochemical properties of the resins, including the presence of LA linkages such as C-N cross linking. The LA resin creates strong bonds between pieces of wood, metals (aluminum and stainless steel) and plastics. Internal bond strengths (IBS) of balsa wood and medium density fiberboard specimens glued with LA resins, measured using an Instron instrument, were comparable to those bonded with commercial polyurethane (PU) and polyvinyl acetate (PVAc) resins. Resins prepared with ozone-pretreated lignin have significantly larger molar masses and display increased bond strengths with glued substates as inferred from IBS measurements. This is attributed to the creation of reactive oxygen-based functionalities in the lignin upon ozone pretreatment. Lignin-amino acid resins thus show promise as a feasible and sustainable alternative to petroleum-based resins.  more » « less
Award ID(s):
1919267
PAR ID:
10597855
Author(s) / Creator(s):
; ; ;
Publisher / Repository:
American Chemical Society
Date Published:
Journal Name:
ACS Sustainable Chemistry & Engineering
Volume:
12
Issue:
38
ISSN:
2168-0485
Page Range / eLocation ID:
14305 to 14318
Subject(s) / Keyword(s):
Corn cob lignin, acetosolv extraction, ozone treated lignin, lysine, lignin-amino acid resins, tensile strength.
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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