石墨在固相剪切碾磨力场下的片层剥离及与PVC的纳米复合

Exfoliating interlayer and nanocompositing of graphite with PVC through solid state shear compounding technology

采用固相剪切复合技术成功制备石墨-聚氯乙烯(PVC)复合粉体,实现了石墨的片层剥离和在PVC基体中的纳米分散及对PVC的抗静电改性。通过XRD、SEM、TEM等表征了石墨-PVC/PVC复合材料的结构,研究了其抗静电性能。结果表明,石墨的片层厚度约20nm,径厚比超过10。固相剪切碾磨技术制备的石墨-PVC/PVC复合材料的导电性能有较大提高。在石墨质量分数为2%时,表面电阻率为4.6×107Ω.cm,已达到了抗静电材料的要求,实现了低填充。在石墨质量分数为10%时,表面电阻率达到最低的4.1×104Ω.cm。

The graphite-polyvinylchloride（PVC） compounding powders were successfully prepared by solid state shear compounding technology（S3C） at ambient temperature,and then the graphite-PVC/PVC nanocomposites were processed by moulding.The structure and antistatic performance of graphite-PVC compounding powder and nanocomposites prepared through S3C based on pan-milling were investigated by XRD,SEM,TEM and electrical resistivity tests.The results show that the conductivity properties of graphite/PVC nanocomposites prepared through S3C based on pan-milling 20 cycles at ambient temperature are remarkably improved.The surface resistivity of graphite-PVC/PVC nanocomposites with 2% mass fraction of graphite is 4.6×107 Ω·cm.The surface resistivity of graphite-PVC/PVC nanocomposites with 10% mass fraction of graphite reaches lowest as 4.1×104 Ω·cm.The strip flake of graphite particles with thickness less than 20 nm and the aspect ratio of 10 times disperses homogeneously in the PVC matrix.