摘要
为了获得具有较好压阻稳定性和重复性的力敏复合材料,在炭黑/硅橡胶复合体系中加入纳米氧化钌,完善补充导电相的同时加固硅橡胶交联网络。采用溶剂热还原法制备金属钌纳米颗粒,在空气中热氧化,得到尺寸为数十纳米的氧化钌颗粒;采用溶剂共混的方法制备炭黑/硅橡胶共混胶,用研磨分散的方法将纳米二氧化钌加入炭黑/硅橡胶共混胶中,硫化成型后得到氧化钌(RuO2)-炭黑(CB)/硅橡胶(MVQ)双导电相复合材料。采用自建的压阻性能测试系统测试了复合材料的压阻性能,测量结果表明,CB/MVQ体系中加入一定用量的RuO2其压阻重复性变好,压阻蠕变性得到改善;用扫描电镜、透射电子显微镜分析了复合材料的微观结构,并用能谱分析结合电子衍射图证明了纳米氧化钌以纳米结构存在于复合材料中,丰富和完善了炭黑导电网络,加固了硅橡胶交联网络,这些因素是导致压阻重复性提高的主要因素。
The RuO2-CB/MVQ composite materials were prepared throguh following some steps.First,the nanoruthenium particles had been prepared by solvent thermo-deoxidization way.Secondly,the nano-RuO2 particles had been formed by oxidation reaction of nano-ruthenium particles in air.Thirdly,the carbon black/silicone rubber mixed rubber was prepared by solvent mixing.Fourthly,the nano-ruthenium particles were mixed into carbon black/silicone rubber mixed rubber by rubbing dispersion.Finally,vulcanization molding was carried out at certain preasure and temperature.The piezoresistive properties of CB/MWQ materials were tested with pressure-resistance testing systems designed by ourselves. The test results showed that suitable amounts of RuO2could enhance the stability and creeped of piezoresistive properties of the materials.The microstructure of the materials were analyzed with SEM and TEM.The characterization results showed that nano-RuO2particles dispersed in the materials in nano level.These nanostructure could improve conductive net of carbon black,and reinforce crosslink net of silicone rubber.These factors had advantage to the stability of piezoresistive properties of the materials.
出处
《化工新型材料》
CAS
CSCD
北大核心
2014年第5期164-166,共3页
New Chemical Materials
基金
中国工程物理研究院科学技术发展基金项目(2009A0302018)
