腰果酚
化学
临界胶束浓度
单体
表面张力
有机化学
威猛牌
胶束
乙醚
化学工程
吸附
聚合物
环氧树脂
热力学
水溶液
工程类
物理
作者
Cuiqin Li,Fengfeng Wang,Suyue Guo,Jin Huang,Weiguang Shi,Jun Wang
出处
期刊:Tenside Surfactants Detergents
[De Gruyter]
日期:2016-07-09
卷期号:53 (4): 304-312
被引量:7
摘要
Abstract A series of saturated cardanol polyoxyethylene ether carboxylates was synthesized using renewable saturated cardanol originating from Cashew Nut Shell Liquid as raw material. The structures were characterized by hydrogen nuclear magnetic resonance spectroscopy. The studies of their surface activity and interface activity were carried out to analyze the influence of the chemical structures of the series of cardanol surfactants on the adsorption and micellization. Results showed that saturated cardanol polyoxyethylene ether carboxylates had a good surface activity and interface activity, and the interface activities of the Gemini cardanol surfactants were better than those of the corresponding monomer cardanol surfactants. The critical micelle concentrations (CMC) of all investigated cardanol surfactants, obtained from surface tension measurements, were low in the order of 10 −5 mol/L. The CMCs decreased and the oil-water interface tension for the same cardanol surfactants increased with the increase of the oxyethylene number. The process of micellization became easier with increasing the oxyethylene number. The Δ G θ m values of the Gemini cardanol surfactants were more negative than those of the corresponding monomer cardanol surfactants. The micellization for all cardanol surfactants was a spontaneous process and exhibited enthalpy-entropy compensation. The micellization of all the cardanol surfactants was entropy-driven.
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