Classification of calorimetric titration plots for alkyltrimethylammonium and alkylpyridinium cationic surfactants in aqueous solutions
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منابع مشابه
Coductometric studies of the interaction of acid green 25 with cationic alkyltrimethylammonium bromid surfactants
The interactions between an anionic dye, Acid Green 25 AG and the two cationic surfactants tetradecyltrimethylammonium bromide TTAB, and hexadecyltrimethylammonium bromide CTAB in aqueous solutions far below the CMC are studied using the conductometric method at different temperature. The equilibrium constants and other thermodynamic functions for the process of dye-surfactant ion pair formatio...
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A técnica de titulação calorimétrica isotérmica vem sendo cada vez mais usada na investigação de processos de associação envolvendo surfatantes. Este fato pode ser associado com o desenvolvimento de novos equipamentos mais sensíveis e de mais fácil operação, alido à vantagem de possibilitar a determinação simultânea dos principais parâmetros termodinâmicos associados a estes processos. Entretan...
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A simultaneous determination of cationic and nonionic surfactants has been developed using ion-association titration. Tetrabromophenolphthalein ethyl ester (TBPE) was used as an indicator. Benzalkonium reacted with TBPE to form a blue ion-associate in the organic phase. When tetrakis(4-fluorophenyl)borate was added dropwise to the solution, the color of the organic phase turned to yellow at the...
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Concentrations of cationic surfactants in aqueous solutions have been estimated on the basis of changes in the color of gold nanoparticles, used as reporter probes. We have shown that the colors of gold nanoparticles with anionic protective groups on their surfaces shift from red to indigo/purple and then back to red in a range of cationic surfactant solutions in which concentrations vary from ...
متن کاملInteraction of cationic surfactants with carboxymethylcellulose in aqueous media.
We have examined the polymer-surfactant interaction in mixed solutions of the cationic surfactants, i.e., dodecyltrimethylammonium chloride, dodecyltrimethylammonium bromide, tetradecyltrimethylammonium bromide, hexadecyltrimethylammonium bromide, tetradecyltriphenylphosphonium bromide, and tetradecylpyridinium bromide and a semiflexible anionic polyelectrolyte carboxymethylcellulose in water a...
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ژورنال
عنوان ژورنال: Journal of the Chemical Society, Faraday Transactions
سال: 1997
ISSN: 0956-5000,1364-5455
DOI: 10.1039/a607596g