丙烯酸酯/镍/聚苯胺导电复合压敏胶的制备及其电容传感性能

Fabrication and capacitive sensing performance of acrylate/nickel/polyaniline conductive composite pressure-sensitive adhesive

使用多重溶液流延法,以链球状镍粉(C-Ni)、片状镍粉(F-Ni)和聚苯胺(PANI)为功能填料,与丙烯酸酯型压敏胶(a-PSA)相复合,制备导电压敏胶。研究结果表明,由于重力作用,填料在导电压敏胶厚度方向上呈现非对称分布,使得复合压敏胶的电性能得到显著提升。a-PSA/10%C-Ni/1%PANI具有最高的电导率,可达0.013 S/m。随着PANI粒子含量增加,复合压敏胶的电容对弯折角度和压力的响应程度呈现增长趋势,在PANI粒子质量分数为1%时,电容对弯折角度的响应最为敏感。在压强为12.5 kPa时,电容变化率可以达到1.83。复合压敏胶的拉伸强度是a-PSA的2.88倍,黏附强度随着填料含量的增加呈现减小的趋势。a-PSA/10%C-Ni/1%PANI复合压敏胶具有最佳的综合性能。

In this study,the conductive pressure-sensitive adhesive was prepared through multiple solution casting.Chain spherical nickel powders(C-Ni),flake nickel powders(F-Ni)and polyaniline(PANI)were incorporated as functional fillers into the resultant acrylic type pressure-sensitive adhesive(a-PSA).The results indicated that these fillers were asymmetrically distributed in the thickness direction of the conductive pressure-sensitive adhesive due to the effect of gravity.This significantly improved the electrical properties of the resultant composite pressure-sensitive adhesive.The aPSA/10 wt%C-Ni/1 wt%PANI composite adhesive exhibited the highest conductivity of 0.013 S/m.With increasing the PANI content,there was an increase in the response of the capacitance to bending angle and pressure of the composite adhesives.The most sensitive response to bending angle was observed for the composite adhesives containing 1 wt%PANI.At a pressure of 12.5 kPa,the change rate of capacitance of the composite adhesive reached 1.83.Its tensile strength was 2.88 times as much as that of the a-PSA,whereas its adhesion strength decreased with an increase in the filler content.The a-PSA/10 wt%C-Ni/1 wt%PANI composite adhesive exhibited the best comprehensive performance.