摘要
ＳＤＳ／ＤＴＡＢ复配体系在体相及气／液表面层中相互作用行为研究表明，添加适量ＤＴＡＢ，混合溶液的胶束生成、表面张力降低能力和表面张力降低效率均得到明显改善，这３项指标均在较大浓度比例范围内产生增效效应．分子相互作用理论计算结果显示，ＳＤＳ和ＤＴＡＢ不论在混合胶束还是在混合表面层中均产生强烈相互作用．两亲分子碳氢链之间的疏水相互作用和相反电性离子头基之间的库仑引力是混合体系产生高表面活性的主要原因，等链长的正／负离子铺展剂复配为较大浓度范围内的表面张力降低能力增效提供了条件．
The bulk and surface behavior of binary aqueous mixtures of SDS and DTAB were investigated. By adding of a suitable amount of DTAB, the surface activity of aqueous mixtures was greatly enhanced. The synergism in the mixed micelle formation, the effectiveness and the efficiency of surface tension reduction occured in a quite large range of DTAB mole fraction. The results calculated by thermodynamic theory showed that there were strong interactions between SDS and DTAB both on the air/aqueous solution interface and in the mixed micelles. The hydrophobic interaction between the hydrocarbon chains of surfactants as well as the electrostatic attraction between the oppositely charged headgroups of SDS and DTAB were main driving forces for the synergism mentioned above. The mixture with equal length of the hydrocarbon chains in the cationic/anionic surfactants was favorable to yield synergism in the effectiveness of surface tension reduction.
出处
《福建农业大学学报》
CSCD
1998年第2期249-254,共6页
Journal of Fujian Agricultural University
基金
福建省自然科学基金
关键词
复配体系
浊合胶束生成
表面张力
降低效率
mixture
mixed micelle formation
surface tension reduction effectiveness
surface tension reduction efficiency
