caa a22 4500 465796419 CHVBK 20180323112039.0 cr unu---uuuuu 170327e19900301xx s 000 0 eng 10.1007/BF02539615 doi (NATIONALLICENCE)springer-10.1007/BF02539615 Syntheses of 2-(N-alkyl-N,N-dimethylammonio)ethyl hydrogen phosphates and their physicochemical properties [Elektronische Daten] [Kazuyuki Tsubone, Noriko Uchida] A series of new amphoteric surfactants, having a quaternary ammonium group and a phosphoric acid group, 2-(N-alkyl-N,N-dimethylammonio)ethyl hydrogen phosphates (alkyl: dodecyl, tetradecyl, hexadecyl), were prepared by introducing a phosphoric acid group into N-alkyl-N,N-dimethyl-(N-2-hydroxyethyl) ammoniumiodide, followed by neutralization with sodium hydroxide and removal of inorganic salts. By the evaluation of the physicochemical properties, it was found that the phosphobetaines behave like "nonionic” surfactant in the zwitterionic region, having very small CMC values in comparison with sodium 2-(N-alkyl-N-methylamino)ethyl hydrogen phosphates. Additionally, similar trends were also observed in the experiments from the point of the effect of electrolyte and temperature on CMC, respectively. It should be considered that the hydrophobicity of the surfactant molecule is increased by the electronic interaction between the quaternary ammonium group and a phosphoric acid group. On the other hand, the phosphobetaines gave the smaller values of the occupied area per molecule at the air/water interface than sodium 2-(N-alkyl-N-methylamino)ethyl hydrogen phosphates. Therefore, it is clear that the phosphobetaines have higher surface-active properties than the amphoteric surfactants. American Oil Chemists' Society, 1990 Tsubone Kazuyuki Cosmetics Laboratory, Kanebo, LTD., 5-3-28 Kotobukicho, 250, Odawaracity, Kanagawa, Japan aut Uchida Noriko Cosmetics Laboratory, Kanebo, LTD., 5-3-28 Kotobukicho, 250, Odawaracity, Kanagawa, Japan aut Journal of the American Oil Chemists' Society Springer-Verlag 67/3(1990-03-01), 149-153 0003-021X 67:3<149 1990 67 11746 https://doi.org/10.1007/BF02539615 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02539615 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Tsubone Kazuyuki Cosmetics Laboratory, Kanebo, LTD., 5-3-28 Kotobukicho, 250, Odawaracity, Kanagawa, Japan aut NATIONALLICENCE 700 1- Uchida Noriko Cosmetics Laboratory, Kanebo, LTD., 5-3-28 Kotobukicho, 250, Odawaracity, Kanagawa, Japan aut NATIONALLICENCE 773 0- Journal of the American Oil Chemists' Society Springer-Verlag 67/3(1990-03-01), 149-153 0003-021X 67:3<149 1990 67 11746 Metadata rights reserved Springer special CC-BY-NC licence nationallicence SWISSBIB 465795706 BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer