应用静电纺丝技术制备石墨/聚乙烯醇（PVA）纳米纤维，并将该复合纤维收集成无纺布薄膜；采用扫描电子显微镜（SEM）观察了复合纤维的微观形貌和结构，利用宽频质谱仪测试了纤维的导电性，利用万能强力机测试了不同纳米石墨含量纤维薄膜的拉伸力学性能，并利用X射线衍射仪（XRD）和热重分析仪（TG）测试了复合纤维的物相及热力学行为.结果表明：在聚乙烯醇质量分数为8%、石墨质量分数为4%时，所制备的纳米纤维膜导电性最高，且力学性能最好，与纯PVA相比，电导率和断裂强度分别提高1个数量级和127.33%；XRD测试结果表明，纳米石墨成功附着在PVA中；TG结果表明，石墨/PVA复合纤维初始分解温度相对于纯PVA变化不大，当样品质量保持率为40%时，4%石墨/PVA复合纤维较纯PVA相比，其分解温度提高了35℃.%The electrospinning technology was used to produce graphite/poly (vinyl alcohol) (PVA) composite nanofibers. SEM was used to investigate fiber microstructure, broadband dielectric spectrometer was used to investigate the conductivity, all purpose strength tester was used to test the tensile strength of nanofiber membrane with different graphite contents; and XRD and TGA were used to investigate the phase and thermal properties. The results revealed that the conductivity and tensile strength of the nanofiber membrane reached the highest with 8%!PVA and 4%!graphite, increased by one order of magnitude and 127.33%!respectively. The inclusion of nanographite in the nanocomposite fibers is confirmed by XRD. The TG results showed that compared with PVA nanofibers, the initial heat decomposition temperature of graphite/PVA composite nanofibers had little change, but when the weight percentage was 40%, the heat decomposition temperature of composite nanofibers with 4%! graphite increased by 35℃.
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