微乳液体系中过硫酸钾氧化碘离子的动力学研究  

Study on the Persulfate-Iodide Reaction in Microemulsions

作　　者：安学勤[1] 王涛[1] 沈伟国[1] 

机构地区：[1]兰州大学化学系

出　　处：《化学学报》2002年第6期980-984,共5页Acta Chimica Sinica

基　　金：国家自然科学基金 (Nos.2 98730 2 0 ;2 0 1730 2 4);高等学校骨干教师资助计划资助项目

摘　　要：分别在不同盐浓度的自由水和不同液滴尺寸的微乳液中测量了过硫酸钾氧化碘离子的化学反应速率常数 ,获得微乳液水核中水的活度 ,探讨了水的活度及体系中离子强度与反应速率的关系 ,发现当表面活性剂与水的摩尔比R≤ 2 0时 。Rate constants have been measured for the oxidation of iodide ions by persulfate both in conventional aqueous solutions with various salt concentrations and in the sodium bis(2-ethylhexyl) sulfosuccinate/isooctane/water microemulsions with various molar ratios R of water to surfactant. The activity of water in the aqueous core of the W/O microemulsions has been calculated and shown to be significantly decreasing with the decrease of the size of the microreactor when R≤20. The dependence of the rate constant on activity of water and ionic strength is discussed.

关 键 词：过硫酸钾 氧化 碘离子 动力学 微乳液 微反应器 反应速率 活度 

分 类 号：O643.1[理学—物理化学]