TY - JOUR
T1 - Study on surface adsorption from cationic surfactant-electrolyte mixed aqueous solution including BF4- ion
AU - Imai, Yosuke
AU - Shimamoto, Kei
AU - Takiue, Takanori
AU - Matsubara, Hiroki
AU - Aratono, Makoto
N1 - Funding Information:
This work was supported by a Grant-in-Aid for Scientific Research of Priority Area (No. 20031020) from the Ministry of Education, Science, Sports and Culture.
PY - 2010/6
Y1 - 2010/6
N2 - The surface tension of aqueous mixtures of dodecyltrimethylammonium tetrafluoroborate (DTABF4) and sodium tetrafluoroborate (NaBF4) was measured as a function of total molality and composition of DTABF4 at 298.15 K. The results were analyzed by originally developed thermodynamic equations and compared with those of dodecyltrimethylammonium bromide (DTAB)-sodium bromide (NaBr) mixed system. It was indicated that BF 4- ions reduce the repulsion between DTA+ ions more effectively than Br- ions in the adsorbed film. To investigate this difference more closely, the surface tension of DTAB-NaBF4 and DTABF4-NaBr mixed system was also measured. The data analysis revealed that BF4- ions are adsorbed positively even for the pure NaBF4 system and preferentially to Br- ions in these mixtures. Furthermore, it was concluded that the side-by-side arrangement suggested in the adsorbed film of 1-hexyl-3-methylimidazolium tetrafluoroborate (HMIMBF4) is due to not only the positive adsorption of BF 4- ions but also the capability of hydrogen bond formation between imidazolium ion and BF4- ions.
AB - The surface tension of aqueous mixtures of dodecyltrimethylammonium tetrafluoroborate (DTABF4) and sodium tetrafluoroborate (NaBF4) was measured as a function of total molality and composition of DTABF4 at 298.15 K. The results were analyzed by originally developed thermodynamic equations and compared with those of dodecyltrimethylammonium bromide (DTAB)-sodium bromide (NaBr) mixed system. It was indicated that BF 4- ions reduce the repulsion between DTA+ ions more effectively than Br- ions in the adsorbed film. To investigate this difference more closely, the surface tension of DTAB-NaBF4 and DTABF4-NaBr mixed system was also measured. The data analysis revealed that BF4- ions are adsorbed positively even for the pure NaBF4 system and preferentially to Br- ions in these mixtures. Furthermore, it was concluded that the side-by-side arrangement suggested in the adsorbed film of 1-hexyl-3-methylimidazolium tetrafluoroborate (HMIMBF4) is due to not only the positive adsorption of BF 4- ions but also the capability of hydrogen bond formation between imidazolium ion and BF4- ions.
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U2 - 10.1007/s00396-010-2221-y
DO - 10.1007/s00396-010-2221-y
M3 - Article
AN - SCOPUS:77956467978
VL - 288
SP - 1005
EP - 1011
JO - Colloid and Polymer Science
JF - Colloid and Polymer Science
SN - 0303-402X
IS - 9
ER -