水溶液中阳离子Gemini表面活性剂与右旋糖苷相互作用

Interactions between cationic gemini surfactants and dextran in aqueous solution

通过黏度、电导和紫外光谱方法研究了水溶液中阳离子Gem in i表面活性剂1,2-二亚甲基-双(烷基二甲基溴化铵)(简写为10-2-10和12-2-12)和右旋糖苷之间的相互作用.由于二者之间的相互作用,在Gem in i表面活性剂10-2-10和12-2-12存在下,右旋糖苷溶液表现出电粘效应;随着溶液中右旋糖苷浓度的增加,Gem in i表面活性剂10-2-10和12-2-12胶束电离度呈增加趋势,且右旋糖苷与Gem in i表面活性剂12-2-12之间的相互作用要强于与10-2-10间的相互作用.

Interactions between cationic gemini surfactants, 1,2-ethane bis （ dimethyl alkyl （ C, H2n＋ 1 ） ammonium bromide） （ n = 10 and 12）, and a neutral polysaccharide, dextran, in aqueous solution were investigated by means of viscosity, specific conductance and UV spectra. Dextran displays an electrolyte - electroviscous effect in aqueous solution containing gemini surfactants 10-2-10 and 12-2-12 due to the molecular interactions between dextran and the suffactants. An increase in the degree of micelle ionization of gemini surfactants was found in the presence of dextran in aqueous solution. In addition, the results demonstrate also that interactions of gemini surfactant 12-2-12 with dextran in aqueous solution are stronger than that of 10-2-10 with dextran, owing to longer hydrocarbon chain length of the surfactant 12-2-12.