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Synthesis and Surface Properties of Novel Carboxylic Ester‐Containing Imidazolium‐Based Zwitterionic Surfactants: Monoalkyl 2‐(3‐Methylimidazolium‐1‐yl) Succinate Inner Salts
Author(s) -
Chen Xuewei,
Xin Yujuan,
Yu Fangcai,
Lan Zhili
Publication year - 2017
Publication title -
journal of surfactants and detergents
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.349
H-Index - 48
eISSN - 1558-9293
pISSN - 1097-3958
DOI - 10.1007/s11743-017-1987-z
Subject(s) - chemistry , surface tension , critical micelle concentration , isoelectric point , adsorption , gibbs isotherm , carboxylic acid , thermodynamics of micellization , micelle , proton nmr , fourier transform infrared spectroscopy , organic chemistry , polymer chemistry , chemical engineering , aqueous solution , enzyme , engineering , physics , quantum mechanics
A series of carboxylic ester‐containing imidazolium‐based zwitterionic surfactants, namely, monoalkyl 2‐(3‐methylimidazolium‐1‐yl) succinate inner salts (C n MimSU, n = 8, 10, 12 and 14), have been synthesized. Their structures were confirmed by 1 H NMR, 13 C NMR and FTIR. The typical physicochemical properties parameters such as isoelectric point, critical micelle concentration (CMC), surface tension at CMC ( γ CMC ), surface pressure at CMC (Π CMC ), adsorption efficiency (p C 20 ), the maximum surface excess ( Γ m ), the minimum molecular cross‐sectional area ( A min ) and the value of CMC/ C 20 were determined. The effect of the long‐chain length on the important physicochemical properties of C n MimSU was studied. It is found that the surface activity of C n MimSU is enhanced with the long‐chain length increases.