Surface tension of lithium bromide aqueous solution/ammonia with additives and nano-particles  

作　　者：蔡伟华 孔伟伟 王悦 朱蒙生 王新雷 

机构地区：[1]School of Energy Science and Engineering, Harbin Institute of Technology [2]Department of Agricultural and Biological Engineering, University of Illinois at Urbana-Champaign [3]School of Municipal and Environmental Engineering, Harbin Institute of Technology

出　　处：《Journal of Central South University》2015年第5期1979-1985,共7页中南大学学报（英文版）

基　　金：Project(51206033)supported by the National Natural Science Foundation of China;Projects(2011M500652,2013T60354)supported by the China Postdoctoral Science Foundation;Project(2011LBH-Z11139)supported by the Heilongjiang Postdoctoral Science Foundation,China

摘　　要：In order to investigate the effect of additives and nano-particle on the surface tensions of lithium bromide(Li Br) aqueous solution/ammonia, many experiments were carried out based on Wilhelmy plate method. Firstly, the surface tension of Li Br aqueous solution with 1-octanol was measured and then the comparison between the measured results and previous experimental results was given to verify the measuring accuracy. Some new additives, such as cationic surfactants cetyltrimethyl ammonium chloride(CTAC), and cetyltrimethyl ammonium bromide(CTAB) were chosen in the experiments. The experimental results show that CTAC and CTAB can obviously reduce the surface tension of Li Br aqueous solution/ammonia. In addition, it is found that nano-particles cannot remarkably decrease the surface tension of Li Br aqueous solution/ammonia. However, the mixed addition of additives and nano-particles can remarkably affect the surface tension of Li Br aqueous solution/ammonia. That is to say, additives play more important role in reducing the surface tension of Li Br aqueous solution/ammonia. But nano-particles may enhance the heat transfer in the absorption refrigeration process.In order to investigate the effect of additives and nano-particle on the surface tensions of lithium bromide（Li Br） aqueous solution/ammonia, many experiments were carried out based on Wilhelmy plate method. Firstly, the surface tension of Li Br aqueous solution with 1-octanol was measured and then the comparison between the measured results and previous experimental results was given to verify the measuring accuracy. Some new additives, such as cationic surfactants cetyltrimethyl ammonium chloride（CTAC）, and cetyltrimethyl ammonium bromide（CTAB） were chosen in the experiments. The experimental results show that CTAC and CTAB can obviously reduce the surface tension of Li Br aqueous solution/ammonia. In addition, it is found that nano-particles cannot remarkably decrease the surface tension of Li Br aqueous solution/ammonia. However, the mixed addition of additives and nano-particles can remarkably affect the surface tension of Li Br aqueous solution/ammonia. That is to say, additives play more important role in reducing the surface tension of Li Br aqueous solution/ammonia. But nano-particles may enhance the heat transfer in the absorption refrigeration process.

关 键 词：lithium bromide AMMONIA ADDITIVES NANO-PARTICLES surface tension 

分 类 号：O552.421[理学—热学与物质分子运动论]