pH响应黏弹性油酰胺丙基二甲胺/邻苯二甲酸氢钾胶束体系流变性研究  

Rheological properties of pH-responsive viscoelastic micellar system of oleylamidopropyl dimethyl amine/potassium hydrogen phthalate

作　　者：崔秀 方波[1] 许海涛 CUI Xiu;FANG Bo;XU Hai-tao(Rheology Laboratory,School of Chemical Engineering,East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]华东理工大学化工学院流变学研究室,上海200237

出　　处：《日用化学工业》2020年第7期433-438,共6页China Surfactant Detergent & Cosmetics

基　　金：国家科技重大专项课题(2017ZX05023003)。

摘　　要：通过考察油酰胺丙基二甲胺(PKO-O)/邻苯二甲酸氢钾(PHP)黏弹性胶束体系的稳态剪切黏度、流动曲线、剪切触变性、黏弹性、热触变性等流变学性质,研究了该胶束体系的pH响应性。结果表明,200 s^-1下,pH=7.47时胶束体系稳态剪切黏度较大,为122.3 mPa·s;在pH=7.61,7.47,6.403个状态间,稳态剪切黏度可循环切换多次,表明该胶束体系具有良好的pH响应性;PKO-O/PHP胶束体系为剪切变稀的正触变性流体,其流动曲线可用Cross本构方程进行表征;该体系是典型的黏弹、热触变性流体,pH=7.47时体系具有较大的复模量和显著的热触变性。The pH responsiveness of the viscoelastic micellar system of oleylamidopropyl dimethyl amine(PKO-O)/potassium hydrogen phthalate(PHP)was studied by investigating the rheological properties such as steady-state shear viscosity,flow curve,shear thixotropy,viscoelasticity and thermal thixotropy of the fluid.The steady-state shear viscosity of the micellar system(pH=7.47)was high,which was 122.3 mPa·s at 200 s^-1.And the steady-state shear viscosity could be switched cyclically between the status at pH 7.61,7.47 and 6.40,indicating that this micellar system had good pH responsiveness.In addition,the PKO-O/PHP micellar system was shear-thinning and positive thixotropic fluid.The flow curve could be characterized by the Cross constitutive equation.The micellar system(pH=7.47)was a typical viscoelastic fluid with high complex modulus and significant thermal thixotropy.

关 键 词：油酰胺丙基二甲胺 邻苯二甲酸氢钾 pH响应型胶束体系 流变学性质 

分 类 号：TQ423[化学工程]