炭黑_硅橡胶复合材料的压阻特性研究与改进.pdfVIP

2004 年 3 月 第 1 期 　　　　　　　　　　　　　　传 　感 　技 　术 　学 　报 　　　　　　　　　　　　　　 Study and Improvement on Piezoresistivity of Silicon Rubber/ Carbon Black Compsoites WANG Peng , DING Tianhuai , XU Feng , QIN Yuanzhen ( Dept . of Precision instruments and Mechanology , Tsinghua University ,Beijing 100084 , China) Abstract : 　In order to design and fabricate the flexible force sensor , we have researched the piezoresistivity of silicon rubber/ carbon black composites and given the academic calculation formula between pressure and electrical resistivity. The experiments illustrate that the homogenization of carbon black and the elastic modulus of composites can be improved effectively by dispersing nanosize silica filler and using organic solvent. As a result , the piezoresistivity of composites can be improved. Moreover , the fore - sensitive device fabricated by the composites is free from the limitation of the surface shape of the tested objects which can be widely applied to various squeeze stress measurement on any regular and unregu lar curve surfaces. Key words : 　flexible sensor ; composites ; piezoresistivity ; squeeze stress 炭黑/ 硅橡胶复合材料的压阻特性研究与改进① 王　鹏 , 丁天怀 , 徐　峰 , 覃元臻 (清华大学 　精密仪器与机械学系 ,北京 100084) 摘要 :我们对柔性挤压应力传感器 ,炭黑/ 硅橡胶复合材料的压阻特性进行了研究 ,提出了其压力 - 电阻的简化理 论计算公式。实验研究表明 ,通过添加有机溶剂和 SiO 纳米粉可以有效地提高炭黑分布的均匀程度和复合材料的 2 弹性模量 ,从而改善复合材料的压阻性能。用这种复合材料制备的力敏元件不受被测物体表面形状的限制 ,可以 被广泛应用于各种规则和不规则曲面的挤压应力测量。 关键词 :柔性传感器 ;复合材料 ;压阻 ;挤压应力 ( ) 中图分类号:TP212 　　　文献标识码 :A