聚氯乙烯/炭黑/镀铜纳米石墨微片导电复合材料的研究

Research on PVC/CB/Cu Plating Graphite Nanosheets Electrical Conductive Poly(vinyl chloride)Composites Filled with Mixed Filler

利用超声作用制备粒径约为10μm,平均厚度约为100nm的纳米石墨微片(nano-Gs),然后采用无钯无SnCl2化学镀铜新工艺对nano-Gs表面进行化学镀铜。通过熔融共混法制备聚氯乙烯(PVC)/镀铜nano-Gs和PVC/导电炭黑(CB)/镀铜nano-Gs复合材料。结果表明,当镀铜nano-Gs含量达到逾渗阈值12%(质量分数,下同)时,PVC/镀铜nano-Gs复合材料的体积电阻率达到了最低值104Ω·cm,但其拉伸强度及缺口冲击强度较纯PVC均有所下降;当镀铜nano-Gs含量达到10%,CB含量达到2%时,PVC/CB/镀铜nano-Gs的体积电阻率达到了最低值103Ω·cm,比PVC/镀铜nano-Gs降低了一个数量级,且其拉伸强度及缺口冲击强度较纯PVC均有所提高。

Graphite nanosheets(nano-Gs)were prepared via sonication,of which the particle size was about 10μm and average thickness was about 100 nm,then using palladiμm-free stannous chlorid free electroless plating to plate Cu on the surface of nano-Gs.The PVC/Cu plating nano-Gs and PVC/CB/Cu plating nano-Gs composites were prepared by way of melt blending.The volume resistivity of the PVC/Cu plating nano-Gs composites get the lowest value of 104Ω·cm when the mass fraction of Cu plating nano-Gs reached the percolation threshold(12 %),but the tensile strength and notched impact strength of the composites both decreased compared with the pure PVC;when the mass fraction of Cu plating nano-Gs and CB was 10%and 2%,respectively,the volume resistivity of the PVC/CB/Cu plating nano-Gs composites get the lowest value of103Ω·cm,an order of magnitude lower than PVC/Cu plating nano-Gs,and the tensile strength and notched impact strength of the composites both increased a lot compared with neat PVC.