同电性的季铵盐Gemini表面活性剂C12-s-C12·2Br(s=2,3,4,6)与烷基溴化铵CmTXABr在水溶液中生成了混合胶团,其行为接近理想混合,未出现协同效应(synergism). C12-s-C12·2Br/C12TMABr混合体系胶团的临界胶团总浓度cmcT随s增大先增加,在s=4时出现相对最大值,然后略有下降,这种变化规律类似单组分C12-s-C12·2Br水溶液的胶团化行为. 随着CmTMABr疏水链增长或C12TXABr季铵头基尺寸增大促进了它们与C12-2-C12·2Br的混合胶团化,在等摩尔混合时的cmcT分别为1.30(s=2/C12TMABr)、1.25(s=2/C14TMABr)、0.96(s=2/C16TMABr)、1.27(s=2/C12TEABr)和1.21(s=2/C12TBABr) mmol/L.
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