烷醇酰胺类非离子表面活性剂增稠/稳泡性的比较研究

doi:10.13218/j.cnki.csdc.2018.09.004

摘要/Abstract

摘要： 将本实验室合成的棕榈仁油酸-N-甲基单乙醇酰胺(PNMEA)与市售棕榈仁油酸二乙醇酰胺(PDEA)及棕榈仁油酸单乙醇酰胺(PMEA)进行增稠/稳泡性的比较研究。比较了PNMEA、PDEA和PMEA影响醇醚硫酸钠为主表面活性剂的模拟沐浴露配方的流型、触变性、弹性模量和黏性模量等。研究结果表明:PNMEA自身的表观黏度较低且黏度温敏性较小;用PNMEA、PDEA和PMEA增稠的3种模拟沐浴露均为假塑型非牛顿流体,触变性较弱,在中低角频率和高角频率时分别表现出黏性流体和弹性流体特征,且起泡和稳泡性能相当;PNMEA的增稠效果优于PDEA而与PMEA相当,同时被增稠体系的黏度温敏性比PMEA小,因此PNMEA的增稠性能总体最优秀。综合安全性、增稠性和稳泡性评价结果,PNMEA具有替代PDEA和PMEA成为烷醇酰胺类增稠/稳泡剂主要品种的优势。

关键词: N-甲基单乙醇酰胺, 烷醇酰胺, 流变学, 泡沫性, 温度敏感性

Abstract: A comparative study was conducted among a lab-made palm kernel acid N-methyl monoethanolamide (PNMEA) and two commercial counterparts derived from diethanolamine (PDEA) and monoethanolamine (PMEA) on their properties as thickeners and foam boosters.The effects of PNMEA,PDEA and PMEA on the properties (including the flow pattern,thixotropy,elastic modulus and viscous modulus,etc) of a model shower gel were studied,in which sodium laureth-3 sulfate was used as the key component of the formula.The experimental results show that the apparent viscosity of PNMEA itself is lower and less temperature sensitive than that of PDEA;the model shower gels thickened by the three alkanolamides are all pseudoplastic non-Newtonian fluids and their thixotropies are very weak,and they behave like viscous fluid and elastic fluid at lower and higher shear frequencies,respectively;the three alkanolamides have similar foam-boosting and foam-stabilizing properties for the model shower gel.The thickening effect of PNMEA is superior to that of PDEA and similar to that of PMEA,but the apparent viscosity of the model shower gel thickened by PNMEA is less temperature sensitive than by PMEA.Therefore PNMEA is overall the best thickener among the three alkanolamides.Based on the comprehensive evaluation of safety,thickening property and foam-stabilizing property,PNMEA has advantage over PDEA and PMEA to become the dominant member in alkanolamides.

Key words: N-methyl monoethanolamide, alkanolamide, rheology, foaming property, temperature sensitivity

中图分类号:

TQ423.2

胡学一,谭杰,方云,李俊国,孙洋,李华山. 烷醇酰胺类非离子表面活性剂增稠/稳泡性的比较研究[J]. 日用化学工业, 2018, 48(9): 500-504.

HU Xue-yi,TAN Jie,FANG Yun,LI Jun-guo,SUN Yang,LI Hua-shan. A comparative study on the thickening and foam-stabilizing properties of alkanolamide nonionic surfactants[J]. China Surfactant Detergent & Cosmetics, 2018, 48(9): 500-504.

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