材料期刊网

基于填充型导电高分子柔性复合材料压阻效应，研究导电橡胶压力传感过程中的特殊性能。确定了实验材料与合成工艺，实验室制备出了炭黑填充型导电硅橡胶柔性复合材料，研究了复合材料压力传感特性主要影响因素。分别采用气相法和液相法对炭黑粒子进行表面氧化改性，可有效提高炭黑在基体材料中的分散性，从而改善和提高压力传感性能。双组分基体材料压阻特性优于单组分材料，粘度越大，压阻特性越好，压力传感过程中的电阻弛豫时间越短，电阻迟滞特性系数越小。炭黑与多壁碳纳米管并用，可增强复合材料力敏效应，提高复合材料压力传感性能。

Flexible filled conductive polymer composites have the feature of piezoresistive effect.Based on the force sensitivity,special performance of pressure sensing of conductive rubber are researched.Experimental ma-terials and syntheses are determined.After that the carbon black filled conductive silicone rubber is prepared. For further study,main factors affecting of pressure sensing of conductive rubber composite materials are ana-lyzed.The gas phase and liquid phase method respectively applied on carbon black surface by oxidation pretreat-ment.This method can improve the dispersion of carbon black in the matrix material effectively and enhance the pressure sensing performance of conductive rubber.Two components silicone rubber matrix has better piezore-sistive performance than single component silicone rubber matrix.In the process of pressure sensor,the viscosi-ty of silicone rubber matrix is higher,the better piezoresistive characteristic,the shorter resistance relaxation time,and the smaller coefficient of resistance hysteresis.It can strengthen the force sensitive effect of the com-posite materials and promote and improve the pressure sensing performance by the method of conductive rubber combined with multi-walled carbon nanotubes.