Hexyltrimethylammonium Bromide Solutions at 278.15: A Dielectric Investigation on Micelle Relaxation and Hydration
We have examined the dielectric relaxation of hexyltrimethylammonium bromide solutions at 278.15 K and at 298.15 K in order to investigate the impact of hydrophobic and hydrophilic hydration on temperature. The dynamics of micelles and their hydrophilic and hydrophobic hydration of n-hexyltrimeth...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | en en |
| Published: |
INTI International University
2023
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| Subjects: | |
| Online Access: | http://eprints.intimal.edu.my/1877/1/joit2023_17r.pdf http://eprints.intimal.edu.my/1877/2/325 http://eprints.intimal.edu.my/1877/ http://ipublishing.intimal.edu.my/joint.html |
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| Summary: | We have examined the dielectric relaxation of hexyltrimethylammonium bromide
solutions at 278.15 K and at 298.15 K in order to investigate the impact of hydrophobic and
hydrophilic hydration on temperature. The dynamics of micelles and their hydrophilic and
hydrophobic hydration of n-hexyltrimethylammonium bromide solutions are investigated at a
low temperature of 278.15 K using dielectric measurements. The concentration ranged from
0.0982 to 0.8534 mol•dm-3, and the frequency range covered from 0.2 to 89 GHz. Four Debye
processes added together fit all the spectra. Micelle relaxation processes are visible below the
critical micelle concentration, which denotes premicellar aggregation. The relaxation
mechanisms were investigated with the aid of Grosse's hypothesis. Due to the radial and
tangential diffusion of unbound and bound counter ions around the charged micelles, the two
low frequencies are consequently ascribed to these processes. The hydrophilic hydration, in
which the water molecules are entirely immobilised, is shown to be temperature independent.
On the other side, at lower temperatures, the hydrophobic hydration rises |
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