表面活性剂环境模拟水相粘度温度响应及热力学解析  

Temperature response and thermodynamic analysis of aqueous viscosity in surfactant environment

作　　者：王栋[1] 李静[1] 吕建晓[1] 赵书平[1] 朱延美[2] 

机构地区：[1]大连理工大学环境科学与工程系,辽宁大连116024 [2]泰山医学院,山东泰安271016

出　　处：《大连理工大学学报》2005年第4期527-530,共4页Journal of Dalian University of Technology

摘　　要：使用十二烷基磺酸钠(SDS)和NaCl作为环境水相的模拟组分,跟踪测试了298～348 K(ΔT=5 K)模拟体系粘度的变化. 实验结果发现,粘度μ与温度T的关系符合ln μ=ΔE/RT+B公式,并由此得到了不同组分浓度条件下的活化能ΔE. 温度恒定时,临界胶束浓度前,体系粘度随NaCl浓度增加而略微增加. 临界胶束浓度之后,盐浓度比较低时,溶剂化作用占主导地位;而随着盐浓度的增加,引起胶束水力尺寸大小变化的作用占主导地位. 研究工作可为进一步研究复杂水相提供基础数据和研究方法的参考.NaCl and sodium dodecyl sulfate （SDS） were selected as model substances to simulate the complex environmental aqueous process. The changes of viscosity of model solution at different temperatures and different concentrations with components were traced during the temperature of 298-348 K （△T=5 K）. The temperature response behaviors observed were well described by ln μ =△E/RT ＋ B. Based on these data, the values of activation energy △E were also obtained respectively.It is also observed that at a certain temperature, before critical micelle concentration （cmc）, the viscosity ,μ of the solution increases slightly with the increasing of the concentration of NaCl. After cmc, when the concentration of NaCl was low, the solvation was dominant ; when the concentration of NaCl was increased, the effect of the size of micelle was dominant. This result can provide the basic data and method for researching into the complex aqueous solution.

关 键 词：表面活性剂 粘度 活化能 

分 类 号：X131.2[环境科学与工程—环境科学]