高等学校化学学报2017，Vol.38Issue(2)：312-317,6.DOI:10.7503/cjcu20160517
木质素对酚醛/木质素嵌段共聚树脂制备的影响及反应机理
Lignin Impacts on the Preparation of Phenolic-resin/Lignin Block Copolymer Resin and the Reaction Mechanism?
摘要
Abstract
Phenolic-resin/lignin block copolymer resin was in-situ prepared using alkali lignin under different extraction conditions, phenol and formaldehyde as reactants, industrial xylose production residue as raw material. To obtain the minimum formaldehyde release, the best extraction conditions of alkali lignin are as following:the sodium hydroxide concentration is 5%( mass fraction) , the mass ratio of solid/liquid is 1:12, and the reaction time is 3 h. The formaldehyde release is 0. 115% and boiling water soaked bonding strength is 1.197 MPa, which are superior to the GB/T14074-2006(≤0. 3%,≥0. 7 MPa) . TG, FTIR and SEM results show that alkali lignin involved in the reaction. It improved the thermal stability and bonding strength of phenolic-resin/lignin block copolymer resin, at the same time it decreases the formaldehyde release. All of them improved the storage and application of resin significantly. According to our experimental results, possible reaction mechanism was proposed.关键词
酚化改性/酚醛树脂/甲醛/木质素Key words
Phenolate/Phenolic-resin/Formaldehyde/Lignin分类
化学化工引用本文复制引用
晁威,杨晓敏,周玉,朱燕超,王子忱..木质素对酚醛/木质素嵌段共聚树脂制备的影响及反应机理[J].高等学校化学学报,2017,38(2):312-317,6.基金项目
国家自然科学基金(批准号:51502108)资助.? Supported by the National Natural Science Foundation of China( No. 51502108) . （批准号:51502108）
