镀银纳米石墨微片/丙烯酸酯导电压敏胶的研究

以天然EG(膨胀石墨)为原料,采用超声分散法制得NanoG(纳米石墨微片);然后采用化学镀法制备导电填料Ag-NanoG(镀银纳米石墨微片);最后采用溶液共混法制备丙烯酸酯类Ag-NanoG/PSA(镀银纳米石墨微片/导电压敏胶)。研究结果表明:NanoG表面镀上了一层均匀紧凑的金属Ag,Ag层厚度为250 nm左右,其质量分数为50.04%;导电填料Ag-NanoG已均匀分散在丙烯酸酯PSA基体中,并形成了导电网络;当w(Ag-NanoG)=40%时,Ag-NanoG/PSA的综合性能相对最好,其180°剥离强度为0.25 kN/m,剪切强度为0.133 MPa且电导率为2.5×10-2S/cm。

Study on electro-conductive pressure sensitive adhesive based on silver plating nano-graphite sheet/acrylate

With natural EG(expandable graphite) as raw material,a NanoG(nano-graphite sheet) was prepared by ultrasonic dispersion,then an Ag-NanoG(silver plating-NanoG) as electro-conductive filler was prepared by electroless plating.Finally,an Ag-NanoG/PSA(Ag-NanoG/electro-conductive pressure sensitive adhesive) based on acrylate was made by solution blend method.The research results showed that a metal Ag layer,which thickness and mass fraction were about 250 nm and 50.04% respectively,was evenly and tight plated on NanoG surface.The Ag-NanoG as electro-conductive filler,which electro-conductive network was formed,was evenly dispersed in matrix of acrylate PSA.The Ag-NanoG/PSA had reversely optimal combination property,its 180°peeling strength and shear strength were 0.25 kN/m and 0.133 MPa respectively,and its electrical conductivity was 2.5×10-2 S/cm when mass fraction of Ag-NanoG was 40%.