New method for the synthesis of formaldehyde-free phenolic resins from lignin-based aldehyde precursors

被引:60
|
作者
Foyer, G. [1 ]
Chanfi, B. -H. [1 ]
Boutevin, B. [1 ]
Caillol, S. [1 ]
David, G. [1 ]
机构
[1] Ecole Natl Super Chim Montpellier, Inst Charles Gerhardt, Equipe Ingn & Architectures Macromol, UMR CNRS 5253, 8 Rue Ecole Normale, F-34296 Montpellier 5, France
关键词
Phenolic resins; Formaldehyde-free; Biobased; Vanillin; Resol; Lignin-based; ALDOL REACTIONS; WOOD ADHESIVES;
D O I
10.1016/j.eurpolymj.2015.11.036
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Phenolic resins are mainly obtained from phenol and the highly toxic and volatile formaldehyde. In order to synthesize new formaldehyde substituents for the synthesis of resol-type phenolic resins, we designed a method to functionalize phenolic compounds with aliphatic aldehydes by a two-steps reaction: the functionalization of an acetal group on aromatic hydroxyl functions and the subsequent deprotection of theses acetal groups into aliphatic aldehyde groups. This method was used on the lignin-based aromatic aldehyde precursors i.e. 4-hydroxybenzaldehyde and vanillin to turn them into reactive and difunctional biobased aromatic aldehyde precursors. Those precursors proved to lead to formaldehyde-free and biobased phenolic resins with competitive thermal properties compared to the usual formaldehyde resins. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码:296 / 309
页数:14
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