C_(12)TAB和C_(12)E_7混合水溶液中胶团生成和表面层吸附

Micellization and Adsorption at Air/Water Interface in C _(12) TABand C_(12) E_7 Mixed Aqueous Solutions

C12TAB/C12E7 混合体系的胶团化和表面层吸附行为表明, 在C12TAB水溶液中添加C12E7 使混合体系临界胶团浓度Ccmc 急剧下降, 表面张力降低效率明显提高, 而表面张力降低能力还出现大范围浓度内的增效. 和阴离子/ 非离子表面活性剂混合体系相比较, 阳离子/ 非离子表面活性剂容易形成混合胶团,

Micellization and adsorption at air/water interface in C 12 TAB and C 12 E 7 mixed aqueous solutions have been investigated by surface tension technology.The results showed that with addition of C 12 E 7 into C 12 TAB solution,the critical micelle concentration (C cmc ) was markedly decreased and the surface tension reduction effectiveness and the surface tension reduction efficiency were pronouncedly enhanced.In comparison with anionic/nonionic surfactant mixed system,cationic/nonionic surfactant preferred to form mixed micelles,however,their tendency for adsorption at air/water interface seemed to be weaker than the former.