表面活性剂在低能固体表面上的吸附 Ⅲ.聚苯乙烯胶乳粒子对阴离子表面活性剂的吸附  

Investigation of Surfactant Adsorption on Low-energy Solid Surface Ⅲ. The Adsorption of Anionic Surfactants on the Particles of Polystyrene Latex

作　　者：张文敏[1] 朱(王步)瑶[1] 

机构地区：[1]北京大学物理化学研究所

出　　处：《化学学报》1990年第8期737-741,共5页Acta Chimica Sinica

摘　　要：在无乳化剂的条件下合成了粒径均匀的聚苯乙烯胶乳.发展了应用表面张力计测定吸附等温线的连续平衡法,得到不同盐浓度和温度下聚苯乙烯胶乳对十二烷基硫酸钠和十二烷基苯磺酸钠的吸附等温线.它们属于Giles分类的L_2型或L_4型,采用两阶段吸附模式讨论了吸附机理、吸附层结构及等温线类型变化的规律。Monodisperso polystyrene latex (diameter 0.7μ) was prepared in the absence of emulsifier. Adsorption isotherms of C_(12)H_(25)C_6H_4SO_3Na and C_(12)H_(25)OSO_3Na on the particles of polystyrene latex were obtained by the surface tension method. The isotherms are of L_2 and L_4 types on the Giles classification and changing with the addition of salt (NaBr). Explanation for the adsorption isotherms and the influence of the addition of salt have been provided from the view point of two stages adsorption, i. e. surfactant molecules were adsorbed in the first stage through the interaction with the solid surface while in the second through the hydrophobic interaction with the hydrocarbon chains of surfactant molecules adsorbed.

关 键 词：聚苯乙烯胶乳 表面吸附剂 吸附 

分 类 号：O632.13[理学—高分子化学]