酶解木质素胺的合成及其固化环氧树脂的研究  

Preparation of Enzymolysis Lignin Amine and its Curing Properties for Epoxy Resin

作　　者：关丽珠 邸明伟[1] 

机构地区：[1]东北林业大学生物质材料科学与技术教育部重点实验室,黑龙江哈尔滨150040

出　　处：《化学与粘合》2015年第2期91-94,99,共5页Chemistry and Adhesion

基　　金：黑龙江省自然科学基金资助项目(编号:C201335;A201205);黑龙江省哈尔滨市科技创新人才研究专项资金项目(编号:2014RFXXJ066)

摘　　要：以玉米秸秆酶解木质素为原料和二乙烯三胺进行Mannich反应制备了木质素胺,探讨了单因素反应条件对胺化反应的影响,并将木质素胺参与环氧树脂的固化反应,对其固化物性能进行了分析。结果表明反应温度为90℃、反应时间为3h、Na OH与木质素的质量比为0.07∶100、二乙烯三胺与木质素的质量比为3∶10、甲醛与木质素的质量比为1∶1时胺化效果最好,所制备的木质素胺的氮含量为68.6mg/g。DMA测试表明,聚酰胺/环氧树脂固化体系中木质素胺的加入会提高环氧树脂固化物的储能模量及玻璃化转变温度。TG分析表明,木质素胺的加入使得聚酰胺/环氧树脂固化物的分解温度降低,但体系的最终残余量增加。A corn stalk enzymolysis lignin and diethylenetriamine were used as raw materials to synthesize the lignin-amine via Mannich reaction; and the effect of single Mannich reaction factor on the amination and the curing reaction of enzymolysis lignin amine in epoxy resin- polyamine blends were studied, the performance of cured products were also analyzed. The results showed that the optimized Mannich reaction conditions were determined as follows： the reaction temperature was 90℃, the reaction time was 3h, the mass ratio of NaOH to lignin was 0.07：100, the mass ratio of diethylenetriamine.to lignin was 3：10, and the mass ratio of formaldehyde to lignin was 1：1; and the nitrogen content of the prepared lignin-amine was 68.6mg/g. The DMA analysis of lignin-amine in the epoxy resin-polyamine blends showed that the storage modulus and the Tg of the cured epoxy resin was improved after the addition of the prepared lignin-amine. The results of TG analysis showed that the addition of the lignin- amine reduced the decomposition temperature for the cured epoxy resin, but increased the final residue of cured epoxy resin.

关 键 词：木质素 MANNICH反应 环氧树脂 固化 

分 类 号：TQ314.256[化学工程—高聚物工业]