物理化学学报 >> 1996, Vol. 12 >> Issue (10): 916-920.doi: 10.3866/PKU.WHXB19961011

研究论文 上一篇    下一篇

SnO2水溶胶气-液界面纳米胶粒成膜过程

袁迅道,曾广赋,席时权   

  1. 中国科学院长春应用化学研究所，应用谱学开放实验室，长春 130022
  • 收稿日期:1996-03-26 修回日期:1996-06-28 发布日期:1996-10-15
  • 通讯作者: 袁迅道

Study on the Films Forming Process of Nanosized SnO2 Colloid Particles at the Gas-Liquid Interface

Yuan Xun-Dao,Zeng Guang-Fu,Xi Shi-Quan   

  1. Changchun Institute of Applied Chemistry,Chinese Acedemy of Science,Changchun 130022
  • Received:1996-03-26 Revised:1996-06-28 Published:1996-10-15
  • Contact: Yuan Xun-Dao

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摘要：

采用胶体化学法制得稳定的SnO_2纳米粒子水溶胶．在LB膜槽内，用膜天平考察了溶胶在陈化和匀速压缩过程中，气—液界面表面压力的变化情况，并用布儒斯特角显微镜（BAM），直接观察了陈化过程中界面胶体粒子的自由密堆积成膜过程，和匀速压缩过程中界面胶体粒子的压缩成膜过程，结果发现，新制（或刮净后）的溶胶表面处于亚稳态，而久置的溶胶表面处于稳定状态，并且溶胶气—液界面的纳米波粒，可通过陈化和压缩，密堆积成固态和类固态膜.

关键词: SnO2, 水溶胶, 气-液界面, LB膜, BAM

Abstract:

The hydrosol of SnO2 nanoparticles are prepared by the method of colloid chemistry. The free piling up process of nanosized SnO2 colloid particles are investigated at the gas-liquid interface by LB and Brewster Angle Microscopy techniques. The result indicates that solid state monolayer and multilayer of SnO2 nanoparticles can be formed at the gas-liquid interface only by aging the sol in air or compressing it without amphiphiles surfactant.

Key words: SnO2, Hydrosol, Gas-liquid interface, LB films, BAM