氨基化多壁碳纳米管/PA56复合材料的制备及性能

Fabrication and properties of amino-functionalized multi-walled carbon nanotubes/PA56 composites

为探究碳纳米管对聚酰胺56(PA56)性能的影响,采用氧等离子体对多壁碳纳米管(MWNTs)进行活化,然后与己二胺反应得到氨基化碳纳米管(AMWNTs),再将AMWNTs与PA56进行熔融共混,制备AMWNTs/PA56复合材料。运用FT-IR、Raman分析碳纳米管表面官能团的变化;借助SEM、XRD、DSC、TG和半导体参数测试系统对复合材料的微观形貌、结晶结构、热学及电学性能进行表征,并使用转矩流变仪、过滤性能测试仪对复合材料流变性和可纺性进行测试。结果表明,在MWNTs表面成功接枝了氨基,AMWNTs分散性较好;随着AMWNTs含量的提高,复合材料的热学性能和结晶结构发生变化,同时提高了复合材料的导电性;AMWNTs含量在1.0%以内时对复合材料的流变性影响不大,复合材料的可纺性较好。

In order to explore the effect of carbon nanotubes on the properties of polyamide 56(PA56),multi-walls carbon nanotubes(MWNTs)was modified by oxygen-plasma,and then reacted with hexanediamine to obtain amino-functionalized carbon nanotubes(AMWNTs).Furthermore,the AMWNTs/PA56 composites were prepared by melt-blending method.The changes of surface functional groups of carbon nanotubes were characterized by FT-IR and Raman spectroscopy.SEM,XRD,DSC,TG and semiconductor parameter test systems were used to analyze the microscopic morphology,crystalline structure,thermal and electrical properties of the composites,and using a torque rheometer and a filter performance tester to determine the rheological properties and spinnability of the composites.The results show that the amino groups are successfully grafted on the surface of MWNTs,and the dispersibility of AMWNTs is better.With the increase of the mass fraction of AMWNTs,the thermal properties and crystalline structure of the composites were changed,and the electrical conductivity of the composites was improved at the same time.When the mass fraction of AMWNTs is within 1.0%,it has little effect on the rheology of the composites,and the composites has good spinnability.