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Dhule, India

The measurement of cloud point (CP) under the influence of additives provides an excellent tool for investigation of surfactant macromolecule interaction. The CP of pure surfactant polyoxyethylene (10) cetyl ether (Brij-56) and polyoxyethylene (20) cetyl ether (Brij-58) declined with increased [Bj-56] and [Bj-58]. The CP of mixed systems Brij-56/methionine and Brij-58/methionine shows same trends with increased [Met.]. This is mainly due to increased micelle concentrations. The influence of amino acid on the cloud point of Brij-56 and Brij-58 is a clear indication that the phenomenon of clouding is associated with the different micelles coalescing. The phase separation results from micelle-micelle interaction. Considering cloud point as threshold temperature of the solubility, the energetic of clouding process (ΔG cl 0, ΔH cl 0 and ΔS cl 0) have been evaluated using "Phase Separation Model". It is found that the overall clouding process is exothermic and ΔH cl 0> TΔS cl 0 indicating that the process of clouding is guided by both enthalpy and entropy. This work supports the conjecture that the cloud point is critical phenomenon rather than the growth of micelles.


Patil V.T.,Zbpatil College | Patil P.R.,North Maharashtra University
E-Journal of Chemistry | Year: 2011

Groundwater samples (Three open wells, three tube wells) were collected from six different locations around Amalner town and analyzed during November 2007-February 2008. Fifteen physicochemical parameters were analyzed and the results were compared with water quality standards prescribed by WHO and ISI 10500-91. In the present study, two water samples (one open well, one tube well) showed high EC, TDS, TA, TH values indicating poor water quality. The correlation coefficients were calculated. The significance of the results is further discussed.


Patil A.A.,Zbpatil College | Patil T.J.,Zbpatil College
Asian Journal of Chemistry | Year: 2010

The phenomenon of solubilization of nonionic surfactant Triton X- 100 has been studied through the influence of additive chloramine-T in aqueous medium by measuring the cloud points of the pure surfactant and with chloramine-T. The cloud points of pure surfactant found to be declined with increased concentration of Triton X-100. The cloud points of mixed system show increasing trends with increased chloramine-T. This is mainly due to increased micelle concentrations. The influence of chloramine-T on the cloud point of Triton X-100 is a clear indication that the phenomenon of clouding is associated with the different micelles coalescing. Considering cloud point as threshold temperature of the solubility, the thermodynamic parameters of clouding process (ΔG o cl, ΔH o cl and ΔS o cl) have been evaluated using "phase separation model". The phase separation results from micelle-micelle interaction. It is found that the overall clouding process is exothermic and ΔH o cl > TΔS o cl indicating that the process of clouding is guided by both enthalpy and entropy. This work supports the conjecture that the clouding is critical phenomenon rather than the growth of micelles. Findings of the present work supports to made the probable evidence of electrolyte surfactant interactions in aqueous medium.


Jadhav V.B.,Zbpatil College | Patil T.J.,Zbpatil College
Oriental Journal of Chemistry | Year: 2010

The phenomenon of micellization of non-ionic surfactant Tween 80 has been studied through the influence of additives PVSA in aqueous medium by measuring the cloud points (CP) of the pure surfactant and with PVSA. The CP of pure surfactant Tween 80 found to be declined with Increased (Tween-80]. The CP of mixed system shows same trends with increased (PVSA]. The Influence of PVSA on the doud point of Tween-80 is a clear indication that the phenomenon of clouding is associated with the different micelles coalescing. Considering cloud point as threshold temperature of the solubility, the thermodynamic parameters of clouding process (ΔGcl0, ΔHcl0, and ΔScl0 ) have been evaluated using "Phase Separation Model". The phase separation results from micelle-micelle Interaction. It is found that the overall clouding process is exothermic and ΔHcl0 > T ΔS cl0 indicating that the process of clouding is guided by both enthalpy and entropy. This work supports the conjecture that the clouding is critical phenomenon rather than the growth of micelles. Findings of the present work supports to made the probable evidence of polymer-surfactant interactions in aqueous medium.


Patil A.A.,Zbpatil College | Patil T.J.,Zbpatil College
Oriental Journal of Chemistry | Year: 2010

The phenomenon of solubilization of nonionic surfactant TritonX-114 has been studied through the influence of additive Chloramine-T in aqueous medium by measuring the cloud points (CP) of the pure surfactant and with Chloramine-T.The CP of pure surfactant found to be increased with increased concentration of TritonX-114. The CP of mixed system shows increasing trends with increased Chloramine-T. This Is mainly due to Increased micelle concentrations. The influence of Chloramine-T on the cloud point of TritonX-114 is a clear indication that the phenomenon of clouding is associated with the different micelles coalescing. Considering cloud point as threshold temperature of the solubility, the thermodynamic parameters of clouding process (ΔG cl 0 ΔH cl 0and ΔS cl 0 have been evaluated using "Phase Separation Model". The phase separation results from micelle-micelle interaction. It is found that the overall clouding process is exothermic and ΔH cl 0> TΔS cl 0 indicating that the process of clouding is guided by both enthalpy and entropy. This work supports the conjecture that the clouding is critical phenomenon rather than the growth of micelles. Findings of the present work supports to made the probable evidence of electrolyte-surfactant interactions in aqueous medium.

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