P. H. Elworthy, A. T. Florence, and C. B. Macfarlane, Solubilization by surface-active-agents. London: Chapman & Hall, 1968.
K. Maiti, D. Mitra, S. Guha, and S. P. Moulik, "Salt effect on self-aggregation of sodium dodecylsulfate (SDS) and tetradecyltrimethylammonium bromide (TTAB): Physicochemical correlation and assessment in the light of Hofmeister (lyotropic) effect," Journal of Molecular Liquids, vol. 146, p. 44−51, 2009.
S. Ghosh, "Chemical and micellar properties of binary and ternary surfactant mixture (Cetyl Pyridinium Chloride, Tween-40, and Brij-56) in an aqueous medium," Journal of Colloid and Interface Science, vol. 244, p. 128−138, 2001.
B. Naskar, A. Dan, S. Ghosh, V. K. Aswal, and S. P. Moulik, "Revisiting the self-aggregation behavior of cetyltrimethylammonium bromide in aqueous sodium salt solution with varied anions," Journal of Molecular Liquids, vol. 170, p. 1−10, 2012.
D. Yu, X. Huang, M. Deng, Y. Lin, L. Jiang, J. L. Huang, and Y. Wang, "Effects of inorganic and organic salts on aggregation behavior of cationic gemini surfactants," Journal of Physical Chemistry B, vol. 114, p. 14955−14964, 2010.
S. Glasstone, Text book of physical chemistry, 2nd ed. London: Macmillian, 1960.
Z. Yanjie and S. C. Paul, "Interactions between macromolecules and ions: The Hofmeister series," Current Opinion in Chemical Biology, vol. 10, pp. 658–663, 2006.
N. Hedin, I. Fur, and P. O. Eriksson, "Fast diffusion of the Cl- Ion in the headgroup region of an oppositely charged micelle. A 35Cl NMR spin relaxation study," Journal of Physical Chemistry B, vol. 104, pp. 8544-8552, 2000.
M. Boström, D. R. M. Williams, and B. W. Ninham, "Why the properties of proteins in salt solutions follow a Hofmeister series," Current Opinion in Colloid & Interface Science, vol. 9, pp. 48-56, 2004.
P. L. Nostro, L. Fratoni, B. W. Ninham, and P. Baglioni, "Water absorbency by wool fibers: Hofmeister effect," Biomacromolecules, vol. 3, pp. 1217-1226, 2002.
D. Myers, Surfactant science and technology. Weinheim: VCH Publishers, 1988.
M. L. Corrin and W. D. Harkins, "The effect of salts on the critical concentration for the formation of micelles in colloidal electrolytes1," Journal of the American Chemical Society, vol. 69, pp. 683–688, 1947.
M. Shamsipur, N. Alizadeh, and H. Gharibi, "Physicochemical studies of the hexadecylpyridinium bromide micellar system in the presence of various concentrations of sodium bromide using a surfactant-selective electrode," Indian Journal of Chemistry Section A, vol. 36, pp. 1031-1039, 1997.
A. D. Michele, L. Brinchi, P. D. Profio, R. Germani, G. Sawelli, and G. Onori, "Effect of head group size, temperature and counterion specificity on cationic micelles," Journal of Colloid and Interface Science, vol. 358, pp. 160–166, 2011.
J. Mata, D. Varade, and P. Bahadur, "Aggregation behavior of quaternary salt based cationic surfactants," Thermochim Acta, vol. 428, pp. 147–155, 2005.
P. Mukerjee, K. Mysels, and J. Kapauan, "Counterion specificity in the formation of ionic micelles-size, hydration, and hydrophobic bonding effects," Journal of Physical Chemistry, vol. 71, pp. 4166–4175, 1967.
K. Fujio and S. Ikeda, "Size of spherical micelles of dodecylpyridinium bromide in aqueous NaBr solutions," Langmuir, vol. 7, pp. 2899 -2903, 1991
Š. Bojan and B.-R. Marija, "Temperature and salt-induced micellization of dodecyltrimethylammonium chloride in aqueous solution: A thermodynamic study," Journal of Colloid and Interface Science, vol. 338, pp. 216–221, 2009.
H. Hossein and S. Rahmat, "Influence of sodium salts on the micellization and interfacial behavior of cationic surfactant dodecyltrimethylammonium bromide in aqueous solution," Journal of Chemical & Engineering Data, vol. 60, p. 983−992, 2015.
A. Anwar, A. M. Nisar, U. Sahar, and F. Ummer, "Conductometric study of the interaction of cetrimide with sodium dodecyl sulfate in aqueous medium," Journal of Solution Chemistry, vol. 44, pp. 1640–1654, 2015.
Q. Zhou and M. J. Rosen, "Molecular interactions of surfactants in mixed monolayers at the air/aqueous solution interface and in mixed micelles in aqueous media: The regular solution approach," Langmuir, vol. 19, p. 4555−4562, 2003.
T. Lu, J. B. Huang, and D. H. Liang, "Salt effect on microstructures in cationic gemini surfactant solutions as studied by dynamic light scattering," Langmuir, vol. 24, p. 1740−1744, 2008.
A. Sein and J. B. F. N. Engbert, "Micelle to lamellar aggregate transition of an anionic surfactant in dilute aqueous solution induced by alkali metal chloride and tetraalkylammonium chloride salts," Langmuir, vol. 11, p. 455−465, 1995.
G. Para, E. Jarek, and P. Warszynski, "The surface tension of aqueous solutions of cetyltrimethylammonium cationic surfactants in presence of bromide and chloride counterions," Colloids and Surfaces A: Physicochemical and Engineering Aspects, vol. 261, p. 65−73, 2005.
M. Bostrom, D. R. Wiliams, and B. W. Ninham, "Surface tension of electrolytes: Specific ion effects explained by dispersion forces," Langmuir, vol. 17, p. 4475−4478, 2001.
W. Kunz, L. Belloni, O. Bernard, and B. W. Ninham, "Osmotic coefficients and surface tensions of aqueous electrolyte solutions: role of dispersion forces," Journal of Physical Chemistry B, vol. 108, p. 2398−2404, 2004.
P. K. Weissenborn and R. J. Pugh, "Surface tension of aqueous solutions of electrolytes: Relationship with ion hydration, oxygen solubility, and bubble coalescence," Journal of Colloid and Interface Science, vol. 184, p. 550−563, 1996.
J. Penfold, "Neutron reflectivity and soft condensed matter," Current Opinion in Colloid & Interface Science, vol. 7, p. 139−147, 2002.
M. Benrraou, B. L. Bales, and R. Zana, "Effect of the nature of the counterion on the properties of anionic surfactants. 1. Cmc, ionization degree at the cmc and aggregation number of micelles of sodium, cesium, tetramethylammonium, tetraethylammonium, tetrapropylammonium, and tetrabutylammonium dodecyl sulfates," Journal of Physical Chemistry B, vol. 107, p. 13432−13440, 2003.
S. Chauhan, K. Sharma, D. S. Rana, K. G., and U. Ahmad, "Conductance, apparent molar volume and compressibility studies of cetyltrimethylammonium bromide in aqueous solution of leucine," Journal of Molecular Liquids, vol. 175, pp. 103–110, 2012.
H. Wang, Q. Feng, J. Wang, and H. Zhang, "Salt effect on the aggregation behavior of 1-decyl-3-methylimidazolium bromide in aqueous solutions," Journal of Physical Chemistry B, vol. 114, p. 1380−1387, 2010.
R. Sadeghi, B. Mostafa, E. Parsi, and Y. Shahebrahimi, "Toward an understanding of the salting-out effects in aqueous ionic liquid solutions: Vapor− liquid equilibria, liquid− liquid equilibria, volumetric, compressibility, and conductivity behavior," Journal of Physical Chemistry B, vol. 114, p. 16528−16541, 2010.
R. Sadeghi and F. Jahani, "Salting-in and salting-out of water-soluble polymers in aqueous salt solutions," Journal of Physical Chemistry B, vol. 116, p. 5234− 5241, 2012.
H. Kimizuka and I. Satake, "Estimation of micellar charge from conductivity data of aqueous detergent solutions," Bulletin of the Chemical Society of Japan, vol. 35, pp. 251-256, 1962.
(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.64/2016.4.4/188.8.131.52
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.
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.