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化学学报
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化学学报 ›› 2002, Vol. 60 ›› Issue (6): 980-984. 上一篇    下一篇

研究论文

微乳液体系中过硫酸钾氧化碘离子的动力学研究

安学勤;王涛;沈伟国   

  1. 兰州大学化学系,兰州(730000)
  • 发布日期:2002-06-15

Study on the Persulfate-Iodide Reaction in Microemulsions

An Xueqin;Wang Tao;Shen Weiguo   

  1. Department of Chemistry, Lanzhou University,Lanzhou(730000)
  • Published:2002-06-15

PDF

892

被引次数

14 | 4

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，获得微乳液不核中水的活度，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≤20时，水的活度 随微反应器尺寸减小而快速下降。

关键词: 微乳, 过硫酸钾, 氧化碘, 反应速度, 活度

Rate constants have been measured for the oxidation of iodide ions by persulfate both in conventional aqueous solutions with various salt concentration 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.

Key words: MICROEMUSION, POTASSIUM PERSULFATE, IODINE OXIDE, REACTION RATE, ACTIVITY

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