后交联对PNIPA/PVA纤维温敏性能的影响  

Effect of post crosslinking on thermo-sensitive properties of PNIPA/PVA fibers

作　　者：冯霞[1] 赵后昌[1] 陈莉[1] 

机构地区：[1]天津工业大学材料科学与工程学院,天津300160

出　　处：《天津工业大学学报》2009年第4期6-8,11,共4页Journal of Tiangong University

基　　金：国家高技术研究发展计划项目(863)(2007AA03Z533);天津市科技发展计划项目(06TXTJJC14400)

摘　　要：以过硫酸胺(APS)为引发剂,在聚乙烯醇(PVA)水溶液中原位聚合N-异丙基丙烯酰胺(NIPA)单体,将所得PNIPA/PVA混合水溶液在凝固浴硫酸铵饱和水溶液中纺丝,制备PNIPA/PVA初生纤维.为提高其热稳定性能,对该初生纤维进行热诱导交联和戊二醛交联后处理,并比较3种纤维的温度响应性能及耐热水性能.结果表明:3种纤维均有温度响应性,其中PNIPA/PVA初生纤维的温度响应性最明显,热诱导交联纤维次之,戊二醛交联纤维较差;而耐热水性能差异则正相反,戊二醛交联纤维最好,初生纤维较差.Poly （N-isopropylacrylamide） （PNIPA） is in situ polymerized in polyvinyl alcohol （PVA） aqueous solution with N-isopropylacrylamide （NIPA） as monomer, ammonium per sulfate （APS） as initiator, then the transparent solution of PNIPA/PVA blending is obtained. PNIPA/PVA nascent fiber is successfully prepared from the PNIPA/PVA blending solution via wet spinning process with the saturated ammonium per sulfate aqueous solution as coagulation bath. To improve the performance of heat-water resistance, the PNIPA/PVA nasent fiber is treated by thermally heating and cross linked with glutaraldehyde. The swelling performance, temperature-sensitive behaviors and heat-resistibility of these three kinds of fibers are studied. The results show that all the fibers exhibit temperature-sensitive performance. Among the total, the PNIPA/PVA nascent fiber has the most significant temperature-sensitive performance, the heat treated fiber took the second place and the temperature-sensitive characteristic of glutaraldehyde crossslinked fiber is the weakest. The difference among the heat-water resistance of three kinds of fibers is contrary to the current of temperature-sensitive characteristic.

关 键 词：聚乙烯醇 N-异丙基丙烯酰胺 纤维 后交联 温敏性能 

分 类 号：TS102.52[轻工技术与工程—纺织工程]