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논문 기본 정보

자료유형
학술저널
저자정보
차경온 (홍인대학교 공과대학 화학공학과) 이희종 (홍익대학교 과학기술대학 공업화학과) 김용인 (홍인대학교 공과대학 화학공학과)
저널정보
한국유화학회 한국유화학회지 한국응용과학기술학회지 제9권 제1호
발행연도
1992.1
수록면
63 - 71 (9page)

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초록· 키워드

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Four novel amphoteric surfactants of N-alkoxyethylcarboxybetaine series were synthesized via Schotten-Baurnman reaction between four alkyl chlorides contaning 10, 12, 14 and 16 carbon atoms in their N-alkyl group and dimethylaminoethanol to give the intermediate products, alkoxyethyldimethylamine, Quaternization of these intermediates was permitted to form 2-(alkoxyethyldimethylarnmonio) acetates, whose structures were identified by elemental analysis. IR spectrophotometry and $^1$Hnmr spectrometry. The yield of the final products was shown in the range of $74{\sim}77%$ based on the yield of the intermediate products, Surface tension of the aqueous solution of the final products was measured. and the critical micelle concentrations(cmc) were shown in the range of $2.82{\times}10^{-3}{\sim}2.67{\times}10^{-6}$mol/l, and the surface thension at erne was 35${\sim}$43dyne/cm. Cmc was lowered gradually by the increase of carbon numbers in N-alkyl ether containing group. The isoelectric point was shown in the range of 4.08${\sim}$6.03. It showed a tendency to lean toward the acidic site and its range was broadened as increase of the hydrophobic group length. A linear relationship between log erne and the number of carbon atoms(N) in the hydrophobic alkyl chain was shown in the relative equation of log cmc=2.49-0.50N.

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