碳/氧化锌复合纳米纤维膜的制备及其电阻率的测试分析

Preparation and electrical resistivity research of CNFs/ZnO composite nanofiber membrane

采用静电纺丝的方法制备聚丙烯腈/醋酸锌复合纳米纤维膜,然后经过预氧化、炭化,得到碳/氧化锌复合纳米纤维膜,通过SEM、FT-IR、TEM、EDS、四探针法来表征纳米纤维膜的各项性能。结果表明:在270℃下预氧化2 h,然后经过800℃煅烧1 h后可制得成型良好的碳/氧化锌复合纳米纤维膜;碳/氧化锌复合纳米纤维的直径小于相应的聚丙烯腈/醋酸锌复合纳米纤维;纺丝溶液中醋酸锌的加入提高了最终碳纳米纤维的热稳定性;炭化后的复合纳米纤维表面及内部生成了均匀分散的ZnO纳米颗粒;复合碳纳米纤维膜的电阻率高于纯的碳纳米纤维膜,且电阻率随着ZnO含量的增加而增加。

Polyacrylonitrile/zinc acetate （PAN/Zn （Ac）2） composite nanofibers were produced by electrospinning.After stabilization and carbonization,carbon/zinc oxide （CNFs/ZnO） composite nanofibers were made.Various nanofiber membranes were characterized by SEM,FT-IR,TEM,EDS and SZT-2 automatic four-point probe tester.The results revealed that to obtain desirable CNFs/ZnO composite nanofibers,PAN/Zn （Ac）2 composite nanofibers were stabilized at 270 ℃ for 2 h and carbonized at 800 ℃ for 1 h.The diameters of CNFs/ZnO composite nanofibers were less than those of corresponding PAN/Zn（Ac） 2 composite nanofibers; the thermostability of CNFs was improved by adding acetate zinc into spinning solution; ZnO nanoparticles dispersed well on the surface and inside of the CNFs; and the electrical resistivity of CNFs/ZnO composite nanofibers were higher than that of pure carbon nanofibers,and with the increase of the ZnO content the electrical resistivity of CNFs/ZnO composite nanofibers also increased.