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用毛细管粘度法测量了不同浓度和pH值时吸附在超微粒La_2O_3表面的PMAA-Na膜厚度.用界面移动法测量了超微粒La_2O_3/PMAA-Na吸附物颗粒的电泳淌度.由此求出不同浓度和pH值时胶态分散体系Zeta电势值.采用Fischer等人发展起来的渗透压排斥理论模型,通过对吸附物颗粒间渗透排斥能△Ga的定量计算,较为满意地解释了超微粒La_2O_3/PMAA-Na吸附物颗粒所形成的胶态分散体系的稳定性能.
The thickness of PMAA-Na film adsorbed on the surface of ultrafine La2O3 was measured by capillary viscometry at different concentrations and pH values, and the electrophoretic mobility of La2O3 / PMAA-Na adsorbed particles was measured by the interface mobility method Zeta potential of colloidal dispersions at different concentrations and pH values.Using the theoretical model of osmotic pressure repulsion developed by Fischer et al., We can satisfactorily explain the quantitative calculation of △ Ga by the intermolecular repulsion of adsorbed particles. / PMAA-Na adsorbent particles formed by the colloidal dispersion stability.