Lignin-Based Materials Through Thiol-Maleimide "Click" Polymerization.

ChemSusChem (2017-01-04)
Pietro Buono, Antoine Duval, Luc Averous, Youssef Habibi
摘要

In the present report an environmentally friendly approach to transforming renewable feedstocks into value-added materials is proposed. This transformation pathway was conducted under green conditions, without the use of solvents or catalyst. First, controlled modification of lignin, a major biopolymer present in wood and plants, was achieved by esterification with 11-maleimidoundecylenic acid (11-MUA), a derivative from castor oil that contains maleimide groups, following its transformation into 11-maleimidoundecanoyl chloride (11-MUC). Different degrees of substitution were achieved by using various amounts of the 11-MUC, leading to an efficient conversion of lignin hydroxy groups, as demonstrated by

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Sigma-Aldrich
2,2′-(1,2-乙二基双氧代)双乙硫醇, 95%
Sigma-Aldrich
2-氯-4,4,5,5-四甲基-1,3,2-二氧磷杂环戊烷, 95%
Sigma-Aldrich
11-马来酰亚胺基癸酸, 95% (GC)
Supelco
甲醇 溶液, contains 0.1 % (v/v) trifluoroacetic acid, 5 % (v/v) water, suitable for HPLC