Counterion effect on the thermodynamics of micellization of alkyl sulfates

Article Abstract:

The thermodynamics of micelle formation of anionic surfactants was investigated by using isothermal titration calorimetry (ITC). The temperature changes of deltaS(sub mic) indicated that the process of micellization was entropically driven and deltaG was always negative (thermodynamically favored process) and slightly temperature and counterion dependent.

Thermal properties, Chemistry, Physical and theoretical, Physical chemistry, Sulfates, Mechanical properties, Alkyl groups

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Hydrophobicity and counterion effects on the binding of ionic surfactants to uncharged polymeric hydrogels

Article Abstract:

Gel swelling experiments are used to study the binding of ionic surfactants to a series of nonionic alkylacrylamide hydrogels of increasing hydrophobicity. The binding of hexadecyl trimethylammonium to uncharged gels is sensitive to both the hydrophobicity of the gel and the counterion to the surfactant.

All Other Basic Organic Chemical Manufacturing, Industrial Organic Chemicals, Acrylamides, Polymers, Chemical properties, Acrylamide

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Synthetic macroporous silicas with multilamellar structure

Article Abstract:

Investigation of a novel mixed-surfactant-based synthesis for growing new macroporous forms of silica is discussed. It shows that the DDAB cation and SDS anion surfactant pairs in certain ratios spontaneously produce vesicles that are proved by IOM observation and Na and C MAS NMR characterization.

Industrial sand, Silica & Silica Sand, Industrial Sand Mining, Silica, Chemical synthesis, Silicon dioxide

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