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金属矿山 ›› 2008, Vol. 38 ›› Issue (02): 74-77+82.

• 矿物工程 • 上一篇    下一篇

油酸钠对半水硫酸钙晶须的稳定化机理

王宇斌,韩跃新,袁致涛,印万忠   

  1. 东北大学
  • 出版日期:2008-02-15 发布日期:2011-07-22
  • 基金资助:

    国家自然科学基金项目(编号:5050201171)。

Stabilization Mechanism of Hemihydrate Calcium Sulfate Whiskers by Sodium Oleate

Wang Yubin,Han Yuexin,Yuang Zhitao,Yin Wanzhong   

  1. Northeastern University
  • Online:2008-02-15 Published:2011-07-22

摘要: 采用SEM,FT-IR,XRD等测试方法分析了油酸钠稳定化处理前后半水硫酸钙晶须的表面形貌、表面基团、物相组成,在此基础上研究了油酸钠对半水硫酸钙晶须的稳定化机理。结果表明,油酸钠在半水硫酸钙晶须表面的吸附状态随其用量的不同而不同,油酸钠对半水硫酸钙晶须表面活性点钙离子的封闭作用、对晶须表面离子的阻溶作用以及对晶须表面性质的改变是油酸钠使半水硫酸钙晶须保持稳定的根本原因。

关键词: 半水硫酸钙晶须, 油酸钠, 稳定化机理

Abstract: Testing methods including SEM, FT-IR and XRD were adopted to analyze the surface topography, surface groups and phase composition of the hemihydrate calcium sulfate whiskers before and after the stabilization treatment.On this basis, the stabilization mechanism of hemihydrate calcium sulfate whisker by sodium oleate was studied.The results indicate that the adsorption state of sodium oleate on the surface of hemihydrate calcium sulfate whiskers varies with its dosage.The radical causes for sodium oleate to stabilize hemihydrate calcium sulfate whiskers are its closure of the calcium ions at whisker surface active sites, its prohibition of the dissolution of whisker surface ions and its change of the whisker surface property.

Key words: Hemihydrate calcium sulfate whiskers, Sodium oleate, Stabilization mechanism