Synthesis and Physicochemical Properties of Double-Chain Cationic Surfactants

• DOI: 10.1021/acs.jced.5b00367
• Publication Date: 2015-12-03T12:34:38Z
• Authors: Sinem Engin Özdil; Halide Akbaş; Mesut Boz
• Keywords: Krafft temperature; Cationic polymerization; Thermodynamics of micellization; Aggregation number

In this study two types cationic surfactants were synthesized, purified, and characterized in our laboratory. One them is a series of surfactants, tail–one head surfactant, N,N-dialkyl-N,N-diethylammonium bromide, abbreviated as "m-0-m" (m = 10, 12, 16). The other type N,N′-dialkyl-N,N,N′,N′-tetramethyl-N,N′-ethanediyl-diammonium dibromide, tail–two "m-2-m" 12 Once NMR spectra (1H NMR, 13C NMR) for all the gemini that synthesized taken, then melting temperatures (TM) measured. These have very high surface activity. main goal was to examine some properties these tail by manipulating their dimeric structure. effects alkyl chain length headgroup on surfactant self-assembly solution investigated. Critical micelle concentrations (CMC), degree ionization (α), Krafft (TK) 1 wt % aqueous solutions determined conductance measurements. points found be dependent number carbon atoms decreased addition electrolytes. absence spacer group, peculiar twin may confer relatively low flexibility molecules, with potential implications interfacial properties, namely, micellization.