ABSTRACT The densities and viscosities of dodecyltrimethylammonium bromide (DTAB), glycine, and rac-alanine in water and DTAB in glycine/alanine aqueous solutions have been determined at 288.15, 296.15, 304.15, 312.15, and 320.15 K. The apparent molar volumes (φv) were obtained from these density data. The limiting apparent molar volumes (φv0) and experimental slopes (Sv) were derived from the ...

Bitumen extracted from oil sands is a highly viscous fluid; thus, its transportation via pipelines in original form resembles major challenge. Partial upgrading recently proposed approach that aims to reduce bitumen's viscosity meet the pipeline specifications. To optimize process and make it more cost-effective, novel researched this study. Ionic surfactants were for first time employed promot...

The micellization process of dodecyltrimethylammonium chloride (DTAC) and bromide (DTAB) was studied at 313 K. Nuclear magnetic resonance and calorimetric methods were used. The calorimetric titration curves permitted determination of the critical micelle concentration (CMC) and enthalpy of the micellization process (deltaHm) of the compounds studied. The results obtained were compared to those...

Catalytic electroreduction of carbon dioxide represents a promising technology both to reduce CO2 emissions and store electrical energy from discontinuous sources. In this work, electrochemical deposition copper on gas-diffusion support was tested as scalable versatile nanosynthesis technique for the production catalytic electrodes electroreduction. The effect current density additives (DAT, DT...

Graphene oxide (GO) nanosheet suspension is not stable in physiological ionic fluids. To improve stability, surfactants such as Pluronic 103 (P103) have been tested. Going further, this work investigated whether conferring positive surface charge to the surfactant may adsorption ability of P103 micelles on GO sheets. Positive was induced by adding dodecyltrimethylammonium bromide (DTAB, a catio...

In this thesis, “the specific ion effect on interfacial and colloidal phenomena” was investigated by examining the counterion distribution in the surfactant adsorbed films with the aid of X-ray absorption fine structure under total reflection condition (TR-XAFS) followed by solvation structure analysis as well as by evaluating thermodynamic physicochemical variables through surface tensiometry ...

The hydration of dodecyltrimethylammonium (DTAB) micelles is reinterpreted in light of the results of the companion paper (immediately preceding this paper) that showed that the location of the spin probe 16-doxylstearic acid methyl ester (16DSE) changes as a function of the aggregation number, N, of anionic micelles, i.e, that it does not conform to the zero-order model (ZOM). The ZOM requires...

Polyanionic DNA interacts with cationic amphiphiles to form electrostatic complexes exhibiting rich self-assembled structures. This type of complex has been considered as a nonviral carrier in gene therapy and as a template for nanostructure construction. Here we report a thermally-induced phase transition of the complexes of DNA with the mixtures of a cationic surfactant, dodecyltrimethyl brom...