论文部分内容阅读
将溶剂热还原法制备的金属钌纳米颗粒在空气中热氧化,得到尺寸小于20nm的氧化钌颗粒,用透射电子显微镜、X射线光电子能谱证明空气热氧化得到的氧化钌大部分为金红石相的二氧化钌,具有良好的导电性.用乙烯基硅烷偶联剂对氧化钌表面进行改性,红外吸收谱证明硅烷分子修饰到氧化物表面,将其与甲基乙烯基硅橡胶(PVMS)复合,得到分散性良好的复合材料,其电导温度关系表明,室温电导主要为隧道方式,压阻测量表明,材料在低压缩应变下具有较高的压阻重复性.透射电子显微三维重构图像显示,分散在聚合物中的氧化钌呈现与炭黑很不同的聚积状态,其颗粒间的间隙分布范围小是导致压阻重复性提高的主要因素.
The ruthenium metal nanoparticles prepared by solvothermal method were thermally oxidized in air to obtain ruthenium oxide particles with a size of less than 20 nm. The transmission electron microscopy and X-ray photoelectron spectroscopy proved that most of the ruthenium oxide obtained from thermal oxidation of air was rutile phase Ruthenium dioxide has good conductivity.The surface of ruthenium oxide is modified with vinyl silane coupling agent, and the infrared absorption spectrum is used to prove that the silane molecule is modified to the surface of the oxide and is compounded with the methyl vinyl silicone rubber (PVMS) The results show that the room temperature conductivity is mainly tunneling, and the piezoresistive measurements show that the material has high piezoresistance and repeatability under low compressive strain. Transmission electron microscopy 3D reconstructed image It has been found that the ruthenium oxide dispersed in the polymer exhibits a very different accumulation state from the carbon black. The small distribution of interstices among particles is the main factor that leads to the improvement of the piezoresistive repeatability.