化工进展2018，Vol.37Issue(5)：1702-1708,7.DOI:10.16085/j.issn.1000-6613.2017-1486
不同凝核剂溶液在冷表面上凝结过程的实验研究
Experimental research on solidification of different coagulation agents at cooled surfaces
摘要
Abstract
The influence of coagulation agent,roughness and contact angle on the solidification of droplet on a cooled surface were experimentally studied. A semiconductor chilling plate make the surface keep cold. A thermocouple measures the temperature of droplet center,and a camera records solidification process. The cooled surface is divided into hydrophilic and hydrophobic,one is copper surface and another is sprayed nano-film. Coagulation agents are sodium chloride,potassium chloride and sodium bicarbonate, respectively. From the image recorded by camera,a protuberance form at the top of the completely froze droplet,and the contact area between the droplet and the hydrophilic surface is larger than that on hydrophobic surface,so solidification time of droplet on hydrophilic surface is less. By data analysis,the critical nucleation energy decreases with the roughness of hydrophilic surface,but hydrophobic surfaces is opposite. The increase of coagulation agent concentration can increase the surface energy and the critical nucleation energy, but reduce the phase equilibrium temperature. The critical nucleation energy of sodium chloride solution is minimum and potassium chloride solution is maximum.关键词
凝结/水溶液/粗糙度/接触角/临界成核能Key words
condensation/aqueous solution/roughness/contact angle/critical nucleation energy分类
能源科技引用本文复制引用
刘圣春,宋明,姜婷婷,代宝民..不同凝核剂溶液在冷表面上凝结过程的实验研究[J].化工进展,2018,37(5):1702-1708,7.基金项目
天津市应用基础与前沿技术研究计划(15JCYBJC21600)及天津市高等学校创新团队(TD12-5048)项目. （15JCYBJC21600）
