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。 The effects of SDS, PVP and their mixture on the stability of AgI sol were studied. Adsorption of SDS on the surface of AgI particles mainly by surface active anions increases the zeta potential and improves the stability of the sol. Low concentrations of PVP sensitized the AgI sol, which was stabilized by the steric stabilization of the adsorbed layer at high concentrations. In the mixed solution of PVP and SDS, AgI sol stability increased significantly. This synergistic effect is discussed based on the interaction of PVP with SDS at the solid-liquid interface.