摘要
以2,4-甲苯二异氰酸酯(TDI)、聚环氧丙烷二醇(PPG)为原料,通过预聚、扩链、中和及乳化获得聚氨酯乳液,在合成聚氨酯乳液的不同阶段加入胶原蛋白,得到不同的改性产物,并对改性产物成膜的力学性能、吸水性等进行了研究,讨论了胶原蛋白加入量对改性产物性能的影响,用红外光谱法研究了改性后产物的结构。结果表明,改性过程中既有物理共混,又有化学改性。改性产物所成膜的吸水率达7.2%,抗张强度和硬度分别达25.2MPa和85A。经过该涂饰剂涂饰的皮革的透湿率较高,可达689mg/10cm2·24h。
With toluene 2,4 - diisocyanate and diol polyether as raw materials, polyurethane emulsion was prepared by pre - polymerization, chain - extension, neutralization and emulsification. Collagen hydrolysate was used to modify the polyurethane finishing agent in different reaction stages. The properties of the PU films, including mechanical properties, infrared spectroscopy, and water absorption were studied. The influence of collagen hydrolysate on polyurethane finishing agent was discussed. The results show that there are both physical mixture and chemical reaction in the modification. The water absorption of modified product is 7.2% , and the water vapor permeability of the PU film is 689g/10cm^2· 24h. The tensile strength of the PU film is 25.2MPa, and the hardness of PU film is 85A.
出处
《中国皮革》
CAS
北大核心
2007年第19期37-40,共4页
China Leather
基金
科技部科研院所技术开发研究专项(2004EG111008)资助项目
关键词
胶原蛋白
聚氨酯
涂饰剂
改性
collagen hydrolysate
polyurethane
finishing agent
modification
