镀Ag玻璃微珠-膨胀石墨/聚氯乙烯导电复合材料的制备与表征  

Preparation and characterization of electroless Ag plating on glass beads-expanded graphite/poly(vinyl chloride)electrical conductive composites

作　　者：张梦玉[1] 王劲[1] 陈星亮[1] 薛融[1] 齐暑华[1] 

机构地区：[1]西北工业大学理学院,西安710072

出　　处：《复合材料学报》2016年第7期1400-1407,共8页Acta Materiae Compositae Sinica

摘　　要：采用一种无Pd无SnCl2化学镀Ag新工艺对空心玻璃微珠（HGB）表面进行化学镀Ag,然后通过熔融共混方法制备镀Ag玻璃微珠（Ag-GB）-膨胀石墨（EG）/聚氯乙烯（PVC）复合材料。借助SEM、EDS和XRD测试手段对Ag-GB镀层的表面形貌与结构进行了表征,研究了Ag-GB和EG作为复合填料对Ag-GB-EG/PVC复合材料导电和力学性能的影响。结果表明：预处理的HGB的表面更易于Ag层的沉积,镀覆的镀层更为均匀、致密;Ag-GB表面的Ag层质量分数为81.15%;固定Ag-GB的质量分数为15%,随着EG质量分数的增加,Ag-GB（15%）-EG/PVC复合材料的体积电阻率呈非线性降低趋势,当EG的质量分数达到逾渗阈值12%时,Ag-GB（15%）-EG/PVC复合材料的体积电阻率为2.18×10^3Ω·cm,满足抗静电PVC材料的应用要求。添加质量分数为12%的EG,Ag-GB（15%）-EG/PVC复合材料的体积电阻率与单独填充质量分数为50%的Ag-GB时Ag-GB/PVC复合材料的体积电阻率相当,此时其拉伸强度达到最大值。Electroless Ag plating was performed on surface of hollow glass beads （HGB）using a Pd-free and SnCl2 free electroless Ag plating new process,then electroless Ag plating on glass beads （Ag-GB）-expanded graphite （EG）/poly（vinyl chloride）（PVC）composites were prepared by melt blending method.Surface morphology and structure of Ag-GB coating were characterized by SEM,EDS and XRD test methods.And the effects of Ag-GB and EG as composite fillers on the electrical conductive and mechanical properties of Ag-GB-EG/PVC composites were also investigated.The results show that the surface of pretreated HGB result in Ag layer deposition easily,the coat-ing is more uniform and compact,and the mass fraction of Ag layer on the Ag-GB surface is 81.15%.When the mass fraction of Ag-GB is fixed to 1 5%,with the increase of EG mass fraction,the volume resistivity of the Ag-GB （1 5%）-EG/PVC composites decreases nonlinearly.When the mass fraction of EG is about 1 2%,which reaches the percolation concentration,whose volume resistivity is 2.18×10^3 Ω·cm,meeting application requirement for anti-static PVC materials.Furthermore,when the mass fraction of EG is 1 2%,the volume resistivity of the Ag-GB （15%）-EG/PVC composites is equivalent to that of the Ag-GB（50%）/PVC composites,and the tensile strength of the Ag-GB（1 5%）-EG/PVC composites reaches the maximal value.

关 键 词：聚氯乙烯 镀Ag玻璃微珠 膨胀石墨 导电 复合材料 

分 类 号：TQ325.3[化学工程—合成树脂塑料工业]