木质素
聚氨酯
制浆造纸工业
材料科学
选择(遗传算法)
纤维素
生物量(生态学)
化学工程
化学
高分子科学
木质纤维素生物量
稻草
有机化学
复合材料
工程类
计算机科学
生物
农学
人工智能
作者
J. C. De Haro,Chiara Allegretti,A.T. Smit,Stefano Turri,Paola D'Arrigo,Gianmarco Griffini
出处
期刊:ACS Sustainable Chemistry & Engineering
[American Chemical Society]
日期:2019-06-10
卷期号:7 (13): 11700-11711
被引量:60
标识
DOI:10.1021/acssuschemeng.9b01873
摘要
New biobased polyurethane (PU) coatings with high lignin content were developed and characterized in this work. These materials were based on a ?,?-diisocyanate monomer (1,4-bis(4-isocyanato-2-methoxyphenoxy)butane, VA-NCO) obtained from lignin-derived vanillic acid and its further cross-linking reaction with three different nonchemically modified technical lignins obtained from different pulping processes, namely, mild acetone organosolv, kraft, and soda. After determining the optimal VA-NCO/lignin mass ratio for each type of lignin, an in-depth characterization of the obtained PU coatings highlighted their high biomass content, effective cross-linking, improved thermal stability, hydrophobic character, good adhesion performance on different types of substrates, and tunable mechanical response. These properties were found to be well-correlated to the chemical-physical features of the parent lignins used (namely, molecular weight, glass transition temperature, distribution of phenylpropane subunits, and -OH content), thereby suggesting the possibility to predictively tailor the characteristics of such biobased PU coatings by lignin selection. The results of this study demonstrate that the reaction of a lignin-derived biobased diisocyanate with different chemically unmodified technical lignins represents an interesting pathway for the production of thermosetting PU coatings with a high biomass content that can find application as high-performance biobased materials alternative to traditional petroleum-based platforms. © 2019 American Chemical Society.
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