超疏水纳米结构表面池沸腾特性  

Pool Boiling Performance of Superhydrophobic Nanostructured Interface

作　　者：陈粤[1] 刘俊威[1] 莫冬传[1] 吕树申[1] 

机构地区：[1]中山大学化学与化学工程学院,广东广州510275

出　　处：《工程热物理学报》2011年第4期634-636,共3页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.50976126)

摘　　要：本文通过采用物理气相沉积法于TiO_2纳米管阵列表面修饰一层聚四氟乙烯(PTFE)纳米颗粒,得到超疏水表面,并研究此超疏水纳米结构表面的池沸腾特性。研究表明,超疏水纳米结构表面沸腾特性类似于膜沸腾,沸腾工质难以浸润该表面,其沸腾传热系数及临界热流密度均较低。分析表明,固液处于Cassie-Baxter接触状态,纳米结构表面向沸腾工质给热效率低,是超疏水纳米结构表面沸腾效率低的主要原因。In this work,pool boiling heat transfer of superhydrophobic nanostructured interface is investigated on the teflon（PTFE） nanoparticles decorated TiO_2 nanotube arrays（TNTAs） interface. The PTFE nanoparticles layer on the TNTAs was prepared by physical vapor deposition method.The pool boiling performance of the superhydrophobic interface was similar to the film boiling.During the pool boiling process,the water can hardly soak the superhydrophobic interface,and the boiling heat transfer coefficient and the critical heat flux（CHF） are both low.The results may be attributed to the Cassie-Baxter solid-liquid contact state,which gives rise to a week heat transfer from solid to liquid.

关 键 词：池沸腾 超疏水 纳米结构表面 TIO2纳米管阵列 Cassie-Baxter状态 

分 类 号：TK124[动力工程及工程热物理—工程热物理]