材料期刊网

采用硅烷偶联剂（KH550）改性膨胀石墨（EG）和不锈钢纤维（SSF）,将表面处理前后的EG和SSF与丙烯晴-丁二烯-苯乙烯（ABS）树脂通过混炼挤出制备了复合材料,分析了EG、SSF含量及改性处理EG、SSF对复合材料导电性能和力学性能的影响。结果表明,随着EG含量增加,复合材料的体积电阻率逐渐下降,且变化规律符合＂渗滤效应＂;EG改性后,复合材料的体积电阻率减小,拉伸强度增大,冲击强度减小。改性EG含量保持20%不变,加入SSF后,复合材料的导电性能有较大提高;SSF改性后,复合材料的体积电阻率变大,拉伸强度和抗冲击强度均提高,当改性后SSF含量为16%时,体积电阻率为5190Ω.cm,拉伸强度和抗冲击强度分别为50.11MPa和2.1kJ/m2。

In this research,silane coupling agent（KH550） modified expanded graphite（EG） and stainless steel fiber（SSF）,composite was prepared by melt extrusion using modified and unmodified EG and SSF,acrylonitrile-butadiene-styrene（ABS） resin.Effect of EG and SSF contents,modification treatment of EG and SSF on electrical and mechanical properties of composite were studied.The experimental results showed that electric volume resistivity of composite gradually decreased with the increase of EG content,and the law accorded with ＂percolation effect＂,modification treatment of EG made electric volume resistivity of composite decrease,tensile strength and zoid notched compact strength of composite increase and weaken.Keeping modified EG content was 20%,conductive property of composite was improved greatly with the increase of SSF content,modification treatment of SSF made electric volume resistivity of composite increase,and both tensile strength and zoid notched compact strength of composite increase;electric volume resistivity of composite was 5190Ω·cm,tensile strength and zoid notched compact strength of composite were 50.11MPa and 2.1kJ/m2 when modified SSF content was 16%.