纳米溴化锂溶液稳定性及其沸腾温度研究  

Study on Stability and Boiling Temperature of Nano-LiBr Aqueous Solution

作　　者：王亮亮[1] 解国珍[1] 

机构地区：[1]北京建筑大学,北京100044

出　　处：《制冷学报》2014年第2期44-48,共5页Journal of Refrigeration

基　　金：国家自然科学基金(51176007)资助项目;北京市自然科学基金项目(3112009)资助~~

摘　　要：对既有溴化锂溶液、纳米微粒及其相应分散剂配制的纳米溶液,对比测试其与纯溴化锂溶液的表面张力和沸腾温度,探讨了该纳米溶液的热物性及稳定性。实验发现,添加纳米微粒溶液的表面张力明显降低,经过温度工艺处理后,发现溶液中纳米微粒的颗粒度降低,纳米微粒在溴化锂溶液中几乎完全溶解,纳米溶液显现出很好的稳定性,其表面张力和沸腾温度均比纯溴化锂溶液有所降低。研究表明,最佳组份配制的纳米溶液与纳米微粒和相关分散剂有关,经过严格温度处理工艺流程,可获得稳定性、热物性良好的纳米溴化锂溶液,有利于在工程中应用。The stability and thermal-physics properties of the nano-fluid, which is made of lithium bromide （LiBr） aqueous solution, nano-particles and relevant dispersants, were researched through a contrastive experimental method that surface tension and boiling tem- perature of nano-fluid and pure LiBr aqueous solution were tested respectively. It was discovered experimentally that the surface tension of solution added nano-particles reduces significantly and granularity of the nano-fluid decreases obviously through temperature processing. The nano-particles almost completely dissolves into LiBr aqueous solution, and the solution shows better stability and both its surface tension and boiling temperature both have a decrease compared with pure LiBr aqueous solution. The study shows that best composition of nano-fluids is related to the types and contents of nano-particles and relevant dispersants. Through strict temperature processing, the nano-fluid has a better engineering application than the pure LiBr solution because of its good stability and better thermal-physics properties.

关 键 词：纳米溴化锂溶液 对比分析法 稳定性 沸腾温度 

分 类 号：TB383[一般工业技术—材料科学与工程] TB612