戊二醛交联胶原水解物制备木材胶黏剂  

Preparation of wood adhesive with glutaraldehyde cross- linked collagen hydrolysate

作　　者：徐腾[1] 黄鑫[1] 廖学品[2] 石碧[1] 

机构地区：[1]四川大学皮革化学与工程教育部重点实验室,四川成都610065 [2]四川大学制革清洁技术国家工程实验室,四川成都610065

出　　处：《中国皮革》2015年第18期1-5,共5页China Leather

基　　金：863课题(2011AA06A108)资助

摘　　要：以制革废弃物提取的胶原水解物(CH)为原料,通过戊二醛(GA)交联,合成了一种新型蛋白基胶黏剂(GCH),并研究了其粘接性能。结果表明:胶原水解物的氨基含量随戊二醛用量和反应温度的增加而降低,平均分子质量随戊二醛用量和反应温度的增加而增加,并且戊二醛与胶原水解物的氨基之间反应生成交联和支链结构,反应产物的热稳定性增加。戊二醛用量对粘接强度影响较大,而交联反应温度对粘接强度影响较小,在适当范围内提高戊二醛用量,会明显增加其粘接强度。当戊二醛用量与胶原水解物质量比为0.16,反应温度为50℃时,将该胶黏剂用于桦木的粘接,其剪切强度达到1.35MPa,是未交联胶原水解物的1.4倍,满足GB/T 9846.3-2004标准中Ⅳ类胶合板的使用要求。A novel adhesive G - CH was prepared by using glutaraldehyde as the cross - linking agent, and collagen hydrolysate （CH） derived from tanned leather wastes as the raw material. The adhesive properties of glutaraldehyde cross - linked collagen hydrolysate （G -CH） were systematically investigated. It shows that increasing reaction temperature and the dosage of glutaraldehyde both lead to a decreased content of amine group in the G - CH, while the average molecular weight of G - CH is increased accordingly. Compared with CH, the thermal stability of G - CH is increased. This should be attributed to the cross - linking of glutaraldehyde towards the amine groups of CH, during which the cross - linkages and branched structures are both involved. We also note that the G - CH due to the fact that in dosage of glutaraldehyde contained in G - CH has significant influences on the adhesion strength of creasing the dosage of glutaraldehyde in a proper range can improve the adhesion strength. In con- trast, change of reaction temperature has limited influence on the adhesion strength of G - CH. When the mass ratio of glutaraldehyde/CH is 0. 16 and the reaction temperature is 50℃, the as - prepared G - CH can be used for the bonding of birch. The corresponding shear strength is 1.35 MPa, which is 1.4 times of that of CH, thus fully meeting the requirements of GB/T 9846. 3 - 2004 standard of IV - type plywood.

关 键 词：水解胶原 戊二醛 胶黏剂 平均分子质量 剪切强度 

分 类 号：TQ430.6[化学工程]