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本文用高分辨~1H-NMR 谱,研究了十二烷基硫酸钠(SDS)胶束水溶液对 m-二甲苯和苯甲醇的增溶作用。结果表明,增溶物浓度很低时,m-二甲苯和苯甲醇均吸附在胶束-水“界面”。随着浓度增加 m-二甲苯增溶在胶束的“栅栏”层和内核中,并沿 SDS 的烃链均匀分布。当浓度约为0.34摩尔分数时,它沿烃链的增溶达到“饱和”,开始进入胶束内核中心。苯甲醇主要增溶在“栅栏”层中,其羟基靠近胶束-水“界面”,苯基深入到与α-CH_2基相邻的五个亚甲基的位置。
In this paper, the solubilization of m-xylene and benzyl alcohol by aqueous sodium dodecyl sulfate (SDS) micelles was studied by 1H NMR. The results show that m-xylene and benzyl alcohol adsorb on the micellar-water interface when the concentration of solubilizers is low. As concentration increases, m-xylene solubilizes in the “fence” layer and core of micelles and is evenly distributed along the hydrocarbon chain of SDS. At a concentration of about 0.34 mole fraction, it reaches “saturation” along the solubilization of the hydrocarbon chain and begins to enter the micelle core center. Benzyl alcohol mainly solubilizes in the “barrier” layer, with hydroxyl groups near the micelle-water “interface” and phenyl deep into the five methylene groups adjacent to the α-CH 2 group.