Synthesis of Novel Zwitterionic Heterogemini Surfactants Derived from Fatty Acid and Investigation of Their Behavior at the Air-Water Interface

Author(s): Erlei Yu, Xamxi Kamar Mamat, Yagang Zhang, Wumanjiang Eli.

Journal Name: Letters in Organic Chemistry

Volume 12 , Issue 8 , 2015

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Abstract:

A series of novel cationic–non-ionic heterogemini surfactants (Cn-1EC-s-Cm where n and m represents the hydrocarbon chain length of fatty acid and aliphatic amine, n=12, 14, 16, 18, m=12, 14, 16) were synthesized from fatty acid, epichlorohydrin and aldciphatic amine. The chemicals tructures of the surfactants were characterized by IR spectra, NMR, ESI-MS and elemental analysis. Their critical micelle concentrations (CMC) in the aqueous solutions were determined by surface-tension at 25°C.Relationship between γcmc and hydrophobic chain length was established which showed a large increase upon increasing of chain length with ester. The surface-tension measurements ofCn-1EC-s-Cm showed a low CMC, which greatly improve the efficiency in lowering the surface tension. Furthermore, adsorption and micellization behavior of Cn-1EC-s-Cm were investigated by measuring minimum average area per surfactant molecule and standard free energy.

Keywords: Zwitterionic, heterogemini, surfactants, fatty acid, cationic, non-ionic.

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Article Details

VOLUME: 12
ISSUE: 8
Year: 2015
Page: [590 - 597]
Pages: 8
DOI: 10.2174/1570178612666150629181035
Price: $58

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