硬段侧链含有双季铵盐的聚氨酯的合成及表征  

Synthesis and Characterization of Polyurethane with Pendent Quaternary Ammonium Salts

作　　者：罗建斌[1] 李杰[1] 李洁华[2] 谭鸿[2] 钟银屏[2] 

机构地区：[1]西南民族大学化学与环境保护工程学院,四川成都610041 [2]四川大学高分子科学与工程学院,四川成都610065

出　　处：《四川大学学报（工程科学版）》2007年第6期91-95,共5页Journal of Sichuan University (Engineering Science Edition)

基　　金：国家自然科学基金资助项目(50673063)

摘　　要：为了解决单铵盐抗菌聚氨酯存在的对革兰氏阴性细菌抗菌性能差、扩链剂用量大的问题,合成了硬段侧链含有双季铵盐的系列聚氨酯。用GPC和核磁共振研究了材料的分子量和结构,表明双季铵盐扩链剂成功引入了聚氨酯主链。通过傅立叶变换红外光谱(FTIR)和差热分析(DSC)研究了材料的本体微相分离结构。发现,随着双季铵盐含量的增大,材料的软段和硬段之间的氢键结合增加,微相分离程度降低。Polyurethanes with pedant quaternary ammonium salts （QAS） have been shown potent antimicrobial properties against gram-positive bacteria but less sensitive to gram-negative ones. Besides, due to using a large amount of QAS chain extender,s, Polyurethanes with pedant QAS have been proven to be high water adsorption and even water soluble. In order to solve the two problems mentioned above of biocidal polyurethane with QAS groups, Polyurethanes were synthesized from the chain extender with pendant bis-ammonium salts and verified by GPC and ^1HNMR. The degree of microphase separation of sythesized polyurethans was characterized by FTIR and DSC. It was found that the phase separation of the two sets of the polyurethanes decreased with increasing the amounts of bisammonium salts chain extenders as proven by DSC and FTIR.

关 键 词：双季铵盐 聚氨酯 合成 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]