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论文类型：期刊论文
发表时间：2011-07-05
发表刊物：COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
收录刊物：SCIE、EI
卷号：384
期号：1-3
页面范围：612-617
ISSN号：0927-7757
关键字：Single long-chain; Double long-chain; Triazine; Synthesis; Surface tension
摘要：This paper discusses a series of single and double long-chain 1,3,5-triazine amphoteric surfactants, which were synthesized by cyanuric chloride, aliphatic amines and sodium 2-(methyl amino) ethane sulfonate. Their structures were confirmed by MS. NMR and IR. The critical micelle concentrations (CMC) and surface tensions at CMC (gamma(CMC)) of all prepared amphoteric surfactants were determined by K100C processor tensiometer at 25 degrees C. As the length of the hydrophobic chain of single long-chain 1,3,5-triazine amphoteric surfactants increases, the values of their CMC and gamma(CMC) gradually decrease, and the minimum average area per surfactant molecule (A(min)) increases. The gamma(CMC) values of double long-chain 1,3,5-triazine amphoteric surfactants are observed to be obviously lower than that of the single long-chain ones. For double long-chain 1,3,5-triazine amphoteric surfactants, the more symmetrical hydrophobic chains are, the lower gamma(CMC) values are. When two hydrophobic chains are symmetrical, the longer hydrophobic chains, the lower values of gamma(CMC) and A(min). However, the gamma(CMC) and A(min) of the surfactant with double 12 hydrophobic chains ascends. Crown Copyright (C) 2011 Published by Elsevier B.V. All rights reserved.