Results 121 to 130 of about 990 (174)

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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Thermodynamic properties of pentanol in dodecyltrimethylammonium bromide aqueous solutions

Colloids and Surfaces, 1989
Abstract Pentanol in dodecyltrimethylammonium bromide (DTAB) aqueous solutions was investigated extensively in the course of our studies of the thermodynamic properties of micellar solutions. Volumes, heat capacities and enthalpies of solution, and dilution and mixing as a function of the surfactant concentration were then rationalized in terms of ...
R. De Lisi, S. Milioto
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Morphology Characterization and Single-Molecule Study of DNA−Dodecyltrimethylammonium Bromide Complex

The Journal of Physical Chemistry B, 2011
DNA compaction induced by dodecyltrimethylammonium bromide (DTAB) is studied using atomic force microscopy (AFM) and magnetic tweezers. The morphology of DNA-DTAB complex is dependent on the DTAB concentration and incubation time. With magnesium ions, the complexes show rod- and network-like structures after approximately 5 min of incubation at low ...
Shi-Yong, Ran, Yan-Wei, Wang, Guang-Can, Yang, Lin-Xi, Zhang   +3 more
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Dodecyltrimethylammonium bromide in water-urea mixtures: structure and energetics

The Journal of Physical Chemistry, 1992
Enthalpies of dilution and osmotic coefficients of dodecyltrimethylammonium bromide (DTAB)-water-urea mixtures as functions of urea (m u ) and surfactant (m g ) concentrations were measured at 298 and 310 K. Small-angle neutron scattering (SANS) measurements were also performed on some DTAB-D 2 O-urea mixtures at two surfactant concentrations and ...
E. Caponetti, S. Causi, R. De Lisi, M. A. Floriano, S. Milioto, R. Triolo   +5 more
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ADSORPTION OF TOLUENE ON BENTONITES MODIFIED BY DODECYLTRIMETHYLAMMONIUM BROMIDE

Chemical Engineering Communications, 2011
The adsorption of toluene was studied by using various types of adsorbents (Na+- and Al3+-bentonite) modified by dodecyltrimethylammonium bromide (DTAB). The characterization of these new sorbing matrices by XRD and IR indicates that DTAB tallow interacted with bentonite and increased the interlayer spacing of the clay with double-layered formation ...
F. Sekrane, Z. Bouberka, A. K. Benabbou, M. Rabiller-Baudry, Z. Derriche   +4 more
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Polymerization of vinyl acetate in microemulsions stabilized with dodecyltrimethylammonium bromide and cetyltrimethylammonium bromide

Polymer, 2002
The polymerization of vinyl acetate in microemulsions stabilized with dodecyltrimethylammonium bromide (DTAB), cetyltrimethylammonium bromide (CTAB) or mixture of these surfactants is examined. The polymerization rate diminishes as the surfactant mixture becomes richer in DTAB.
M Gómez-Cisneros, R.G López, R.D Peralta, L.C Cesteros, I Katime, E Mendizábal, J.E Puig   +6 more
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