Journal of the Korean Applied Science and Technology (한국응용과학기술학회지)

The Korean Society of Applied Science and Technology (한국응용과학기술학회)
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Synthesis and Properties of Fatty Ester Type Cationic Gemini Surfactants

고급지방산 에스테르형 양이온 제미니 계면활성제의 합성 및 특성

  • Park, Jong-Kwon (Department of Engineering Chemistry, College of Engineering Chungbuk National University Chemistry) ;
  • Jeong, Noh-Hee (Department of Engineering Chemistry, College of Engineering Chungbuk National University Chemistry)
  • 박종권 (충북대학교 공과대학 공업화학과) ;
  • 정노희 (충북대학교 공과대학 공업화학과)
  • Received : 2011.03.26
  • Accepted : 2011.04.15
  • Published : 2011.06.30
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Abstract

Cationic gemini-surfactant, namely 1,4-butane-bis(N-alkanoyloxyethyl-N,Ndimethyl)-diammonium bromide was synthesized and their inhibition effect on corrosion of mild steel in 1 M HCl solution was tested by weight loss method. The synthesized product was confirmed by FT-IR and $^1H-NMR$ spectroscopy. Surface tensions were measured by surface tensiometer Sigma 70. Their c.m.c. values evaluated by surface tension method was $4.1{\times}10^{-5}{\sim}5.4{\times}10^{-5}$ mol/L. The Krafft point of the these surfactants were <0~$10.7^{\circ}C$. The emulsifying properties of synthesized cationic gemini surfactants and sodium dodecyl sulfate (SDS), tetradecyl trimethyl ammonium bromide (TTAB) was investigated. Of these, 1,4-butane-bis(N-lauroyloxyethyl-N,N-dimethyl)- diammonium bromide, CGL 14-4-14 has been confirmed as a good emulsifier. The inhibition efficiency increases by increasing cationic gemini surfactant concentration. As a result, these surfactants are expected to be applied as corrosion inhibitors.

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