中华医学超声杂志

应用化学 ›› 1986, Vol. 0 ›› Issue (4): 17-21.

• 研究论文 • 上一篇    下一篇

γ-Fe2O3的表面润湿性与其悬浮液的稳定性

马季铭, 吴佩强, 迟震寰, 商乐维   

  1. 北京大学物理化学研究所
  • 收稿日期:1985-07-29 修回日期:1985-10-04 出版日期:1986-08-10 发布日期:1986-08-10
  • 通讯作者: 马季铭

THE WETTABILITY OF γ-Fe2O3 PARTICLES AND THE STABILITY OF THEIR SUSPENSIONS

Ma Jiming, Wu Peiqiang, Chi Zhenhuan, Shang Lewei   

  1. Institute of physical chemistry, Peking University, Beijing
  • Received:1985-07-29 Revised:1985-10-04 Published:1986-08-10 Online:1986-08-10

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摘要： 自吸附与表面润湿性的测量确定,油酸钠自水溶液在γ-Fe3O2上的吸附为多层吸附。第一层为化学吸附,油酸钠分子的碳氢链朝外,从而使质点表面憎水化。在高浓度时发生第二层吸附,油酸钠分子依靠碳氢链之间的相互作用吸附在第一吸附层上,使质点表面重新亲水化。质点表面的润湿性与其水相和非水相悬浮液的稳定性有直接的对应关系。

Abstract: Based on the experimental results of adsorption and wettability, it is concluded that the adsorption of sodium oleate on γ-Fe2O3 from aqueous solution is of multilayer. The molecules in the first layer are chemisorbed with their hydrocarbon chains extending outward. At higher concentration the second adsorption layer forms and converts the particle surface into hydrophilic again. The wettability of particle surface was found to be related directly to the stability of bothe aqueous and nonaqueous suspensions.

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