Results 161 to 170 of about 3,006 (211)

Dodecyltrimethylammonium bromide-disodium dodecanephosphonate mixed micelles

Colloid & Polymer Science, 1999
The aqueous catanionic system dodecyltrimethylammonium bromide (DTAB)–disodiumdodecanephosphonate (DSDP) was studied by potentiometry, conductivity, surface tension, spectrometry and dye solubilization. No precipitation of neutral salts was found in the entire range of compositions studied. Up to four transitions were detected. The first transition, at
P. C. Schulz, R. M. Minardi, B. Vuano
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Tetradecyltrimethylammonium Bromide + Dodecyltrimethylammonium Bromide Mixed Micelles in Aqueous Glycol Oligomers

Bulletin of the Chemical Society of Japan, 1999
Abstract The conductances of tetradecyltrimethylammonium bromide (TTAB) + dodecyltrimethylammonium bromide (DTAB) mixtures over the entire mole fraction range of TTAB (αTTAB) were measured in pure water as well as in the presence of various aqueous ethylene glycol oligomers containing 5 and 10 wt% of each additive in their respective ...
Mandeep Singh Bakshi, Ushwinder Kaur
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Enthalpy of micellization II. n-dodecyltrimethylammonium bromide

The Journal of Chemical Thermodynamics, 1970
Abstract The enthalpy of micellization of n-dodecyltrimethylammonium bromide has been measured using a Beckman 190B microcalorimeter at 23, 25, and 30 °C, in water and in sodium bromide solution as a function of surfactant concentration up to 20 times the critical micelle concentration. Dilution of these micellar solutions was found to be endothermic,
L Espada, M.N Jones, G Pilcher
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Electrophoretic properties of dodecyltrimethylammonium bromide micelles in KBr solution

Electrophoresis, 2000
Charge in ionic micelles determines the trends of their stability and their practical applications. Charge can be calculated from zeta potential (zeta) measurements, which, in turn, can be obtained by Doppler microelectrophoresis. In this study, the electrophoretic properties of dodecyltrimethylammonium bromide (DTAB) in KBr aqueous solution (0-6 mM ...
R, Sabaté, M, Gallardo, J, Estelrich
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Miscibility of dodecyltrimethylammonium bromide and dodecyltrimethylammonium chloride in surface-adsorbed film and micelle

Colloid & Polymer Science, 1992
Surface tension of aqueous solutions of mixtures of dodecyltrimethylammonium bromide (DTAB) and dodecyltrimethylammonium chloride (DTAC) has been measured and analyzed by using thermodynamic relations. The adsorbed film has been found to contain more DTAB molecules than the solution.
M. Yamanaka, T. Amano, N. Ikeda, M. Aratono, K. Motomura   +4 more
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Mixed Micellization of Dodecylethyldimethylammonium Bromide and Dodecyltrimethylammonium Bromide in Aqueous Solution

Langmuir, 2002
Conductivity and steady-state fluorescence measurements have been carried out at 25 °C to study the monomeric and micellar phases of the aqueous solutions of the mixed system constituted by two cationic surfactants, dodecylethyldimethylammonium bromide and dodecyltrimethylammonium bromide.
Elena Junquera, Emilio Aicart
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Aggregation of the aqueous dodecyltrimethylammonium bromide-didodecyldimethylammonium bromide system at low concentration

Colloid & Polymer Science, 2002
The dodecyltrimethylammonium bromide (DTAB)–didodecyldimethylammonium bromide (DDAB)–water system was studied to elucidate whether the mixed surfactant aggregates are mainly micelles or vesicles, and whether the surfactant–surfactant interaction is ideal or not.
Zulema Proverbio, Pablo Schulz, Jorge Puig   +2 more
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ETS-10 synthesized from gels with dodecyltrimethylammonium bromide

Journal of Thermal Analysis and Calorimetry, 2007
The aim of this paper is to define the characteristics of crystalline phase ETS-10 obtained from gel with dodecyltrimethylammonium bromide, as an organic template. ETS-10 zeolites has been synthesised under hydrothermal conditions from gels of composition 5Na2O–3KF–TiO2–6.4HCl– xC12TMAB –7.45SiO2–197.5H2O (where x=0.0, 0.25, 0.55, 1.0 and 1.5) with ...
N. A. Turta, D. Vuono, P. De Luca, N. Bilba, A. Nastro   +4 more
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Spectrometric Study on the Interaction of Dodecyltrimethylammonium Bromide with Curcumin

Langmuir, 2011
The interaction between dodecyltrimethylammonium bromide (DTAB) and curcumin has been studied in pH 5.0 sodium phosphate buffer using absorption and fluorescence measurements. With increasing DTAB concentration (C(DTAB)) from 0 to 20 mM, the absorption peak of curcumin at 430 nm, corresponding to the conjugated structure of curcumin, first weakens ...
Dan, Ke, Xiaoyong, Wang, Qianqian, Yang, Yumeng, Niu, Shaohu, Chai, Zhiyun, Chen, Xueqin, An, Weiguo, Shen   +7 more
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Physicochemical Properties of Methylcellulose and Dodecyltrimethylammonium Bromide in Aqueous Medium

The Journal of Physical Chemistry B, 2011
Interactions between uncharged polymers and cationic surfactants are considered weaker than interactions with the anionic analogues. This work describes the binding occurring between methylcellulose (MC) and the cationic surfactant DTAB in aqueous medium.
Marcos A, Villetti, Clara I D, Bica, Irene T S, Garcia, Fabiano V, Pereira, Francieli I, Ziembowicz, Carmen L, Kloster, Cristiano, Giacomelli   +6 more
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