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用显微电泳法测定了氧化硅,氧化铝和磷酸锰改性的二氧化钛的电动电位。在碱性介质中进行氧化硅氧化铝改性,提高膜层中二氧化硅/氧化铝的比例有利于增大二氧化钛粒子电动电位负值和改善二氧化钛分散体系的稳定性。膜中磷酸锰的含量对二氧化钛的电动电位影响不明显。
Electrokinetic potentials of silica, alumina and manganese phosphate-modified titanium dioxide were determined by microscopic electrophoresis. Modification of silica alumina in alkaline medium to increase the silica / alumina ratio in the film is beneficial to increase the negative value of the electromotive potential of titanium dioxide particles and to improve the stability of the titanium dioxide dispersion. The content of manganese phosphate in the film had no obvious effect on the electromotive potential of titanium dioxide.