Synthesis and surface properties of new dicephalic saccharide-derived surfactants |
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Authors: | Kazimiera A. Wilk Ludwik Syper Bogdan Burczyk Adam Sokoŀowski Beata W. Domagalska |
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Affiliation: | (1) Institute of Organic Chemistry, Biochemistry and Biotechnology, Wrocŀaw University of Technology, 50-370 Wrocŀaw, Poland;(2) Institute of Organic and Polymer Technology, Wrocŀaw University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocŀaw, Poland |
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Abstract: | A new group of nonionic dicephalic saccharide amides, N-dodecyl-N,N-bis[(3-d-gluconylamido)propyl]-amine, N-dodecyl-N,N-bis[(3-d-glucoheptonylamido)propyl]-amine, and N-alkyl-N,N-bis[(3-lactobionylamido)propyl]amines (alkyl: n-C12H25′ n-C16H33′, n-C18H37) were synthesized and characterized. Their structure and purity were confirmed by means of 1H and 13C nuclear magnetic resonance analysis and electrospray ionization mass spectrometry. Carbon spectra were verified using a DEPT experiment. The surface and interfacial properties such as critical micelle concentration (CMC), standard free energy of micellization, ΔG CMC, surface excess concentration, ΓCMC, and surface area demand per molecule, A CMC, were determined. The tertiary nitrogen atom seems to have a surprising effect on surfactnat packing at the interface. |
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Keywords: | N-Alkyl-N,N-bis[(3-lactobionylamido)propyl]-amines critical micelle concentration N-dodecyl-N,N-bis-[(3- font-variant:small-caps" >d-gluconylamido)propyl]amine N-dodecyl-N,N-bis[(3- font-variant:small-caps" >d-glucoheptonylamido)propyl]amine nonionic saccharide-derived surfactants structure analysis surface activity |
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