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Indexed by: Journal Article

Date of Publication: 2012-07-05

Journal: COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS

Included Journals: EI、SCIE

Volume: 405

Page Number: 45-50

ISSN: 0927-7757

Key Words: Symmetric double chains; S-triazine; Alkylbetaine; Synthesis; Surface activity

Abstract: A series of symmetric double chains alkylbetaine surfactants BCn-n (n=8, 10, 12, 14) were synthesized from cyanuric chloride, aliphatic amines, N,N-dimethylpropane-1,3-diamine and sodium chloroacetate. Their structures were confirmed by MS. TOF-MS, H-1 NMR, C-13 NMR and FTIR. Surface tension measurements demonstrated that BC8-8 and BC10-10 have superior surface activity compared with corresponding conventional surfactants with lower CMC and gamma(cmc) Additionally, interface behaviors of the four surfactants including adsorption and micellization can be reflected by A(min), pC(20) and the calculation of the standard free energy of micellization (Delta G(mic)(theta)) and adsorption (Delta G(ads)(theta)). (C) 2012 Elsevier B.V. All rights reserved.