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研究了直接测定粘附张力、推算表面活性剂在低能固体表面上吸附的方法。与文献结果比较,说明此法可行,且较γ-θ法方便、准确、重复性好。研究了C_(12)H_(25)-SO_4Na、C_(16)H_(33)N(CH_3)_3Br、C_7F_(15)COONa水溶液与聚四氟乙烯、石蜡、甲基化玻璃、聚甲基丙烯酸甲醋界面上的粘附张力及吸附,结果表明:(1)各种表面活性剂在四种固体上的饱和吸附量顺序皆为~ΓPTFE>~ΓAE>~ΓMG>~ΓPMMA与各固体对水粘附张力增加的顺序相同;(2)改善固体亲水性的能力,对于碳氟固体,碳氟表面活性剂优于碳氢表面活性剂,对于碳氢固体则相反。
The direct measurement of the adhesion tension and the calculation of the adsorption of surfactant on low energy solid surface were studied. Compared with the literature results, this method is feasible and more convenient, accurate and repeatable than γ-θ method. The effects of aqueous solution of C_ (12) H_ (25) -SO_4Na, C_ (16) H_ (33) N (CH_3) _3Br, C_7F_ (15) COONa and polytetrafluoroethylene, paraffin, methylated glass, polymethacrylic acid The results showed that: (1) The order of saturation adsorption of various surfactants on the four solids were ~ ΓPTFE> ~ ΓAE> ~ ΓMG> ~ ΓPMMA and the ratio of solids to water (2) The ability to improve the hydrophilicity of the solid. For fluorocarbon solids, the fluorocarbon surfactant is superior to the hydrocarbon surfactant, whereas for the hydrocarbon solid the opposite is true.