微细Sb_20_3粉体对十六烷基三甲基溴化铵的吸附研究

Study on the adsorption of CTAB on the Sb_2O_3/H_2O interface

对阳离子表面活性剂十六烷基三甲基溴化铵 ( CTAB)在微细 Sb2 O3粉体表面上的吸附进行了研究 ,结果表明 CTAB在 Sb2 O3表面吸附量较大 ,吸附等温线属 S型 ,CTAB以二至三个分子缔合的形式吸附于Sb2 O3表面 .吸附 CTAB后的 Sb2 O3颗粒表面带正电 ,ζ电位达 +58.2 mv,体系分散性好 ,稳定性高 .

In this paper,the adsorption of cetyl trimethyl amonium bromide (CTAB) on the Sb 2O 3/H 2O interface has been studied. The adsorption isotherm is S type for CTAB and the thermodynamic calculations that based on the model of two-stages adsorption of surfactant are showed that CTAB is adsorbed on the Sb 2O 3/H 2O interface in association with two or three CTAB moleculers. The adsorption of CTAB on the Sb 2O 3/H 2O interface increases the dispersity and stability of Sb 2O 3 suspension.