Synthesis and Properties of Gemini Cationic Surfactants with Amide Spacers

Chemical Research in Chinese Universities ›› 2005, Vol. 21 ›› Issue (3): 337-339.

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Synthesis and Properties of Gemini Cationic Surfactants with Amide Spacers

DENG Qi-gang^1,2, YU Hong-wei², LIN Hong², JIA Li-hua², GUO Xiang-feng², ZHOU De-rui¹

1. Department of Applied Chemistry, Harbin Institute of Technology, Harbin 150001, P. R. China;
2. College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006, P. R. China

Received:2005-03-14 Online:2005-05-24 Published:2011-08-06
Supported by:
Supported by the Natural Science Foundation of Heilongjiang Province(No.B0202) and Key Teacher Aid Financially Project of Heilongjiang Province(2002), and by the National Basic Research Priorities Program of China(No.2002CCC01200).

Abstract

Abstract: Four gemini cationic surfactants {N,N'-di[2-(lauryldimethylamino)acetyl]polymethylenediamine dichloride, LAA-s-LAA, s=2,3,4,6} were synthesized by using four bis(α-chloroacetamide)s and N,N-dimethyllaurylamine, respectively. The molecular structures were characterized by means of IR, ¹H NMR, ¹³C NMR and MS, and the behavior of their aqueous solutions was studied. The critical micell concentrations(CMC) of LAA-s-LAA were one order of magnitude lower than that of dodecyltrimethyl ammonium chloride(DTAC). With the change of the length of spacer chain(s), their CMC values change, and CMC reaches the top value at s=4.

Key words: Gemini cationic surfactant, Synthesis, Amide spacer, Surface tension

DENG Qi-gang, YU Hong-wei, LIN Hong, JIA Li-hua, GUO Xiang-feng, ZHOU De-rui. Synthesis and Properties of Gemini Cationic Surfactants with Amide Spacers[J]. Chemical Research in Chinese Universities, 2005, 21(3): 337-339.

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Synthesis and Properties of Gemini Cationic Surfactants with Amide Spacers

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