界面活性剤の添加による複合微粒子の調製
1996 年 33 巻 1 号 p. 17-22
詳細
1996 年 33 巻 1 号 p. 17-22
Composite fine particles were prepared by using polymethyl methacrylate latex (diameter c. 6μm) as the core and silica particles (0.51μm) as the shell by the addition of a cationic surfactant (cethyltrimethylammonium bromide).
As the results, the zeta potential of both particles could be adjusted by controlling such factors as pH and the concentration of the surfactant. The coverage of the core surface with silica particles went up to over 0.82 under the optimum preparation condition. The theoretical maximum coverage under that circumstance was 0.91. The coverage and the logarithm of the stability ratio estimated on the basis of the DLVO theory bore a linear relationship to each other.
