ANIONIC GEMINI SURFACTANTS: SYNTHESIS AND SURFACE ACTIVE PROPERTIES

Dipti Shukla and V. K. Tyagi
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Dipti Shukla: Department of Oil and Paint Technology, Harcourt Butler Technological Institute, Kanpur 208002, India
V. K. Tyagi: Department of Oil and Paint Technology, Harcourt Butler Technological Institute, Kanpur 208002, India

Surface Review and Letters (SRL), 2007, vol. 14, issue 05, 991-997

Abstract: New compounds bearing two phosphate groups and two long chain (dodecyl) were prepared by two-step reaction: (i) phosphorylation of dodecanol with pyrophosphoric acid, (ii) reaction of dodecyl phosphate withN(CH3)4OHand 1,6-dibromo hexane. The effect of reaction variables like time and molar ratio of reactants on yield has also been reported. The 1:2:0.5 molar ratio of reactants (dodecyl phosphate,N(CH3)4OH, andBr(CH2)6Br, respectively) and 3 h duration resulted to give maximum yield of anionic gemini surfactants. The structure of synthesized surfactant was investigated by modern analytical techniques, viz. FT-IR,1H NMR,13C NMR.Amphipathic disodium phosphates were obtained by neutralization of free acids with sodium hydroxide and their surface active properties in aqueous solution were measured. These disodium phosphates possessed 77.3% anionic content and showed good water solubility. Foaming properties and wetting ability were also evaluated.

Keywords: Anionic gemini; bis(phosphate); anionic content; wetting; foaming (search for similar items in EconPapers)
Date: 2007
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DOI: 10.1142/S0218625X07010500

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