新型热驱动功能纳米Cu/石蜡复合材料的制备及其导热机理研究

项目名称： 新型热驱动功能纳米Cu/石蜡复合材料的制备及其导热机理研究

项目编号： No.51201152

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 金属材料学科

项目作者： 徐斌

作者单位： 浙江工业大学

项目金额： 25万元

中文摘要： 石蜡在熔点附近具有较大体膨胀率、极低压缩率且化学性质稳定、价格便宜，在高功率微驱动器方面具有巨大的应用潜力。但石蜡极低的热导率导致微驱动器需要更高能量消耗和更长驱动时间，限制了其使用领域。由于Cu具有很高的导热系数，因此，将Cu与石蜡结合形成一类新型高导热性能相变材料，用于微驱动器将是一个新的具有挑战性的研究课题。本项目通过合成Cu(HCOO)2配合物前驱体，选择熔化石蜡作为油浴介质，直接热分解配合物，单步制备纳米Cu/石蜡复合材料。研究有机配体对配合物热分解温度及其在石蜡中溶解度的影响规律；热分解工艺对复合材料微结构、热物性的影响规律及纳米粒子的形成、长大机理；热分解工艺、微结构和热驱动性能之间关系的数学模型；复合材料的导热机理。本项目的研究不仅能为热分解制备纳米Cu/石蜡复合材料提供理论指导和实验基础，而且对加深相变热驱动复合材料导热机理的理解，促进微驱动器技术的发展具有重要的意义。

中文关键词： 铜基微纳米颗粒；石蜡；热分解法；热性能；相变驱动

英文摘要： Paraffin is chemically inert, rather inexpensive. Furthermore, it has the advantage of large coefficient of volume expansion and low compressibility when the temperature reaches to its melt point. It is suitable for using as the expansive material of the High-power microactuator.While paraffin has very low thermal conductivity which necessitates high power consumption and long actuation times-unfavorable features for an effective actuator. Since copper is highly thermal conductive, it can be used to synthesize a new kind of copper/paraffin composites with high thermal conductivity. It is a new challenging research topic of applying this new material in highly effective actuator. This project aims at the synthesis of copper(Ⅱ) formate complex as precursor, direct thermal decomposition of the complexes by the way of oil bathing in the melted paraffin media, and single-step preparation of nanocopper/paraffin composites. In this work, the influence of organic ligand on thermal decomposition temperature and solubility of complex precursor in paraffin is studied, as well as the effect of thermal decomposition process on the microstructure and thermal properties of composites. The formation and growth mechanism of nanoparticles is disclosed. The mathematical model of the relationship among the thermal decomposition pro

英文关键词： copper based micro and nanoparticles；paraffin；thermal decomposition；thermal properties；phase-change actuation