Energetics of anionic surfactant-additive systems at the cloud point |
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Authors: | Shaeel Ahmed Al-Thabaiti Abdullah Yousif Obaid Ziya Ahmad Khan Tanweer Ahmad Arniza Ghazali Kabir-ud-Din |
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Affiliation: | 1.Department of Chemistry,King Abdul Aziz University,Jeddah,Saudi Arabia;2.School of Industrial Technology,Universiti Sains Malaysia,Penang,Malaysia;3.Department of Chemistry,Aligarh Muslim University,Aligarh,India |
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Abstract: | The energetics of clouding in anionic surfactant (SDBS) and tetrabutylammonium bromide system in the presence of additives, such as ureas, amino acids and sugars is reported. The change of standard Gibbs energy of solubilization (ΔG s o) for all of the additives was found to be negative. The values of change of standard enthalpy (ΔH s o) and that of standard entropy (TΔS s o) values were found to depend on the type and chemistry of the additive. The results were explained on the basis including chemistry of additives, their effect on water structure, and solubilization of additives either in the micellar or in aqueous phases. |
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