NMR and neutron scattering studies on spherical and rod-like micelles of dodecyltrimethylammonium bromide in aqueous sodium salicylate solutions
作者： Noriko Onoda-Yamamuro , Osamu Yamamuro , Nobuki Tanaka , Hiroyasu Nomura
DOI: 10.1016/J.MOLLIQ.2004.08.009
关键词:
摘要: Abstract The effect of sodium salicylate (NaSal) additives on micellar structure and dynamics in aqueous solution dodecyltrimethylammonium bromide (DTAB) has been studied by means 1H-NMR quasielastic neutron scattering (QENS) measurements. molar ratio R (=CNaSal/CDTAB) dependence the peak shape NMR spectra revealed that a sphere-to-rod-like transition took place around R=0.5. chemical shift for 1H atoms alkyl group DTA+ ion gave information binding site Sal− micelles. aromatic clarified selective feature dynamic factor, S(Q,E), molecules exhibited apparent broadening elastic which was fitted well to single Lorentzian function. self-diffusion coefficient D obtained from Q-dependence HWHM slope vs. curve changed (R=0.5), reflecting slowing down local relaxational motion rod-like
elsevier.com
sci-hub.se 参考文章(12)
Surfactants in solution Springer US. ,(1989) , 10.1007/978-1-4613-0839-3
Toshiyuki Shikata, Shin-ichiro Imai, Yotaro Morishima, Molecular Motions in Threadlike Micelles Langmuir. ,vol. 13, pp. 5229- 5234 ,(1997) , 10.1021/LA962028N
T. Kajitani, K. Shibata, S. Ikeda, M. Kohgi, H. Yoshizawa, K. Nemoto, K. Suzuki, Construction of the TOF-type cold-neutron spectrometer, AGNES Physica B: Condensed Matter. ,vol. 213-214, pp. 872- 874 ,(1995) , 10.1016/0921-4526(95)00308-V
Toshiyuki Shikata, Shin-ichiro Imai, Dielectric Relaxation of Surfactant Micellar Solutions Langmuir. ,vol. 14, pp. 6804- 6810 ,(1998) , 10.1021/LA980421I
Peter Stilbs, A comparative study of micellar solubilization for combinations of surfactants and solubilizates using the fourier transform pulsed-gradient spin—echo NMR multicomponent self—diffusion technique joint international conference on information sciences. ,vol. 94, pp. 463- 469 ,(1983) , 10.1016/0021-9797(83)90286-2
Ulf Olsson, Olle Soederman, Paul Guering, Characterization of micellar aggregates in viscoelastic surfactant solutions. A nuclear magnetic resonance and light scattering study The Journal of Physical Chemistry. ,vol. 90, pp. 5223- 5232 ,(1986) , 10.1021/J100412A066
Kazuhiko Kandori, Robert J. McGreevy, Robert S. Schechter, Solubilization of phenol and benzene in cationic micelles: binding sites and effect on structure The Journal of Physical Chemistry. ,vol. 93, pp. 1506- 1510 ,(1989) , 10.1021/J100341A063
Jan. Ulmius, Haakan. Wennerstroem, Lennart B. A. Johansson, Goeran. Lindblom, Signe. Gravsholt, Viscoelasticity in surfactant solutions. Characteristics of the micellar aggregates and the formation of periodic colloidal structures The Journal of Physical Chemistry. ,vol. 83, pp. 2232- 2236 ,(1979) , 10.1021/J100480A010
Toshiyuki Shikata, Hirotaka Hirata, Tadao Kotaka, Micelle formation of detergent molecules in aqueous media. 2. Role of free salicylate ions on viscoelastic properties of aqueous cetyltrimethylammonium bromide-sodium salicylate solutions Langmuir. ,vol. 4, pp. 354- 359 ,(1988) , 10.1021/LA00080A019
Toshihiro Tominaga, Masayuki Nishinaka, Tracer diffusion of ionic micelles: effects of size and interactions Journal of the Chemical Society, Faraday Transactions. ,vol. 89, pp. 3459- 3464 ,(1993) , 10.1039/FT9938903459