Acta Chimica Sinica ›› 1990, Vol. 48 ›› Issue (8): 737-741.

Original Articles

### 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

1. 北京大学物理化学研究所
• 出版日期:1990-08-15 发布日期:1990-08-15

### Investigation of surfactants adsorption on low-energy solid surface III: The adsorption of anionic surfactants on the particles of polystyrene latex

ZHANG WENMING;ZHU

• Online:1990-08-15 Published:1990-08-15

A onodisperse polystyrene latex (diam. 0.7 mm) was prepared in the absence of emulsifier. Adsorption isotherms of Na dodecylbenzenesulfonate and SDS on the latex particles were obtained by the surface tension method. The isotherms were of L2 and L4 types on the Giles classification and changed with the addition of NaBr. Explanations for the adsorption isotherms and the effect of the added salt were provided from the viewpoint of 2-stage adsorption, i.e., surfactant mols. 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 adsorbed surfactant mols.

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