Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/15504
Title: Energetic, surface-chemical and hydrodynamic studies on cetyltrimethylammonium bromide and sodium salicylate
Authors: Roy, B K
Moulik, S P
Issue Date: Jan-1999
Publisher: NISCAIR-CSIR, India
Abstract: Molecular interaction between cetyltrimethylammonium bromide (CTAS) and sodium salicylate (NaSal) has been investigated. A 1:1 complex is formed in solution. The mixed solution at this composition micellizes at 0.12 mmol dm-3 at 30o C , and the mixed micelle binds nearly 55% counter-ions. The molecular complex formation between CTAS and NaSal combination is an exothermic process. The micellization of CTAS-NaSal combination is also exothermic and a two-step process, the overall enthalpy values falling in the range of 10-15 kJ mol-1 at 30o C. The micellization process is prominently entropy controlled. The surface excess of CTAB and its minimum area at the air-water interface in NaSal, NaCI and NaSr environments have been determined. The CTAS-NaSal system is non-Newtonian and viscoelastic, and show shear thinning properties.
Page(s): 17-25
URI: http://hdl.handle.net/123456789/15504
Appears in Collections:IJC-A Vol.38A(01) [January 1999]

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