高等学校化学学报 ›› 1991, Vol. 12 ›› Issue (3): 377.

• 论文 • 上一篇    下一篇

SDS与PVP对碘化银溶胶稳定性的影响

马季铭, 吴广伟   

  1. 北京大学化学系, 100871
  • 收稿日期:1989-08-14 出版日期:1991-03-24 发布日期:1991-03-24
  • 通讯作者: 马季铭

The Effect of SDS and PVP on the Stability of Agl Sols

Ma Ji-ming, Wu Guang-wei   

  1. Department of Chemistry, Peking University, Beijing, 100871
  • Received:1989-08-14 Online:1991-03-24 Published:1991-03-24

摘要: 研究了SDS、PVP及二者的混合物对AgI溶胶稳定性的影响。SDS主要通过表面活性负离子在AgI质点表面上的吸附使ζ电势升高,提高溶胶的稳定性。低浓度的PVP使AgI溶胶敏化,高浓度时又通过吸附层的空间稳定效应使其稳定。在PVP与SDS的混合溶液中,AgI溶胶的稳定性显著增加。根据PVP与SDS在固液界面上的相互作用讨论了这一增效作用。

关键词: 碘化银溶胶稳定性, 十二烷基硫酸钠, 聚乙烯吡咯烷酮

Abstract: The stability of Agl sols in SDS, PVPand their mixed solutions has been studied. The addition of SDSincreases the stability of Agl sols mainly by the increase of zeta potential of Agl particles due to the adsorption of surface active anions on particle surface. The Agl sols are sensitized at low PVPconcentration, and become stable through the steric stabilization of the adsorbed layer at high PVPconcentration. In the mixed solutions of PVPand SDS, the stability of Agl sols is enhanced markedly. This synergistic effect of PVPand SDSon the stability of Agl sols was discussed in terms of the interaction between polymer and surfactant at solid/liquid interface.

Key words: Stability of AgI sols, Sodium dodecylsuJfate, Polyvinylpyrrolidone

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