SDS和C8 NBr混合表面活性剂的协同效应

本文计算了盐存在时不同比例的十二烷基硫酸钠和溴化正辛基三甲基铵混合物在混合吸附单分子层及胶团内的相互作用强度。结果表明,该混合体系在表面张力降低效率、混合胶团形成及表面张力降低效能三方面都存在明显的协同效应。理论计算和实验结果相当一致,表明可用该理论处理γ—lgc实验数据,以定量表征两种表面活性剂分子之间的相互作用强度。对计算中的一些问题也进行了讨论。

Synergism in Binary Mixtures of Surfactants of SDS and C_8NBr

Theoretical calculation on synergism in mixed surfactants of sodium dodecysulfate(SDS)—octyltrimethyl ammonium bromide(C_8N Br)and comparison with experimental data are reported in this paper. The theory is based on Rubingh’s model which incorporates a regular solution of ap-proximimation to describe the interaction between surfactant molecules in the mixed micelle. Using the treatment developed by Rosen and Rubingh to calculate the molecular interaction between SDS and C_8N Br. It has shown that the calculation results are well cnsistent with experiments for synergism in surface tension reduction efficiency, for synergism in mixed micelle forma-tion and synengism in surface tension reduction effectiveness. This pro-vides a further theoretical analysis for γ—log C experiments.