Polyacrylic acid and polyacrylamide as cloud point modifier for Brij-30 in alcoholic aqueous solution

ABSTRACT

Cloud point (CP) measurement of aqueous nonionic surfactant Brij-30 was studied at various concentrations of surfactants in pure and mixed system with water-soluble polymers polyacrylicacid (PAA) and polyacrylamide (PAM). The CP of Brij-30 was found to increase on increasing the surfactant concentration. The CP of Brij-30 was to initially decrease with the addition of PAA and then increase with further addition of PAA. The CP of Brij-30 was to increase with increase in concentration of PAM. The same trend was observed for all surfactant concentrations in the presence of PAA and PAM, respectively. Considering CP as a threshold temperature of the solubility, the thermodynamic parameters of the clouding process (Δ, Δ, and Δ) were evaluated using the “Phase Separation Model”. The results indicate that the clouding phenomenon of Brij-30 is exothermic and in the presence of additives it is an endothermic and nonspontaneous process.

GRAPHICAL ABSTRACT

KEYWORDS:

• Brij-30
• cloud point
• phase separation model
• polyacrylamide
• polyacylicacid

Acknowledgments

The authors are thankful to Hon’ble Principal and Head Department of Chemistry, Kisan Arts Commerce and Science College, Parola, Dist. Jalgaon, and also thankful to Hon’ble Principal and Chemistry Department Dr. B. S. Desale Science College, Sakri, for providing laboratory facilities.