聚酰胺66/氨基化多壁碳纳米管纤维制备及其性能  

Preparation and properties of polyamide 66/amino-functionalized multi-walled carbon nanotubes fibers

作　　者：张娇 高雪峰[1,2] 王玉周 刘海辉 张兴祥[1,2,3] ZHANG Jiao;GAO Xuefeng;WANG Yuzhou;LIU Haihui;ZHANG Xingxiang(School of Material Science and Engineering,Tiangong University,Tianjin 300387,China;Tianjin Municipal Key Laboratory of Advanced Fiber and Energy Storage,Tiangong University,Tianjin 300387,China;Key Laboratory of Advanced Textile Composites of Ministry of Education,Tiangong University,Tianjin 300387,China)

机构地区：[1]天津工业大学材料科学与工程学院,天津300387 [2]天津工业大学先进纤维材料与储能技术天津市重点实验室,天津300387 [3]天津工业大学先进纺织复合材料教育部重点实验室,天津300387

出　　处：《纺织学报》2019年第11期1-8,共8页Journal of Textile Research

基　　金：国家重点基础材料研发计划资助项目(2016YFB0303000);天津市新材料重大专项(16ZXCLGX00090)

摘　　要：为提高聚酰胺66(PA66)纤维的力学性能,将羧基化碳纳米管(CMWNTs)与乙二胺(EA)进行功能化反应得到氨基化碳纳米管(AMWNTs),再将AMWNTs与PA66盐原位聚合制备AMWNTs掺杂PA66材料(PACNTs),并通过熔融纺丝制备成纤维。采用热重分析仪、差示扫描量热仪、X射线衍射仪及单纤维强力仪等对PA66和PACNTs纤维进行结构和性能表征。结果表明:PACNTs纤维的熔点随着AMWNTs的加入向低温方向移动,AMWNTs的加入使PA66分子质量下降,PACNTs纤维的结晶温度向高温方向移动,AMWNTs起到异相成核作用;随着AMWNTs的加入,PACNTs纤维的拉伸强度和弹性模量增加,当AMWNTs质量分数为0.5%时,PACNTs纤维的拉伸强度和弹性模量达到最大,比纯PA66纤维分别提高了约157%和455%。In order to improve the mechanical properties of polyamide 66(PA66)fiber,carboxylated multi-walled carbon nanotubes(CMWNTs)were condensed with ethylenediamine(EA)to obtain amino-functionalized multi-walled carbon nanotubes(AMWNTs),and AMWNTs doped PA66 composites(PACNTs)were prepared by in-situ polymerizing AMWNTs with polyamide 66 salt.Furthermore,the composites were melt-spun into fibers.The fibers were characterized using thermogravimetry,differential scanning calorimeter,X-ray diffraction and single fiber strength tester.The results show that,the melting temperature of the PACNTs fiber moves toward the low temperature direction as the content of AMWNTs increases,the addition of AMWNTs lowers the molecular weight of PA66,and the crystallization temperature of the PACNTs fiber moves toward the high temperature direction as a result of AMWNTs acting as a heterogeneous nucleation agent.The tensile strength and elastic modulus of the PACNTs fiber increase with increasing the content of AMWNTs.The tensile strength and elastic modulus of PACNTs fiber reach the maximum when the mass fraction of AMWNTs is 0.5%,which increase by approximately 157%and 455%as compared with those of PA66,respectively.

关 键 词：多壁碳纳米管 聚酰胺66 原位聚合 纤维 力学性能 

分 类 号：TQ342.12[化学工程—化纤工业]