International Journal of Chemistry and Materials Research

Published by: Pak Publishing Group
Online ISSN: 2311-763X
Print ISSN: 2312-0991
Total Citation: 34

No. 4

Aggregational Attitude of Hexadecyltrimethylammonium Bromide in Aqueous Solutions of Sodium Salt at 298.15k

Pages: 27-34
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Aggregational Attitude of Hexadecyltrimethylammonium Bromide in Aqueous Solutions of Sodium Salt at 298.15k

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DOI: 10.18488/journal.64/2016.4.4/64.4.27.34

Osundiya Olubunmi Medinat , Olaseni Segun Esan

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(2016). Aggregational Attitude of Hexadecyltrimethylammonium Bromide in Aqueous Solutions of Sodium Salt at 298.15k. International Journal of Chemistry and Materials Research, 4(4): 27-34. DOI: 10.18488/journal.64/2016.4.4/64.4.27.34
This research reports micelle formation of hexadecyltrimethylammonium bromide and the dependence of aggregation number on the array of sodium salts in aqueous solution.  Critical micelle concentration, degree of micelle ionization, and aggregation number were obtained from electrical conductivity measurement. Pseudo-phase separation model was used to evaluate and discussed standard Gibb’s free energy of micellization. It was observed that hexadecyltrimethylammonium bromide critical micelle concentration decreases while aggregation number increases. Amongst the sodium salt, disodium hydrogen phosphate was found to have the highest tendency in reducing hexadecyltrimethylammonium bromide critical micelle concentration. The sodium salts with the highest valency anion strongly promote micellization of hexadecyltrimethylammonium bromide, indicating the dependence of aggregation phenomenon on the availability of anion.

Contribution/ Originality
These studies estimate the role of sodium salt (NaNO3, Na2HPO4, NaCl, Na2CO3 and Na2HPO4) on the micellization of HTABr. The role play by sodium ions is a contribution to the existing literature i.e aggregation depends on availability of anions.