• Dr. MAYANK

Micro-emulsions are clear, stable, isotropic liquid mixtures of oil, water and surfactant, frequently in combination with a co-surfactant. The aqueous phase may contain salt(s) and/or other ingredients, and the `oil` may actually be a complex mixture of different hydro- carbons and olefins. In contrast to ordinary emulsions, micro-emulsions form upon simple mixing of the components and do not require the high shear conditions generally used in the formation of ordinary emulsions. The two basic types of micro-emulsions are direct (oil dispersed in water, o/w) and reversed (water dispersed in oil, w/o). The comparative effects of surfactants in formulation of micro-emulsions have been summarized and show the reduction of interfacial tension of oil and water. Dispersion of surfactant leads to increase in entropy and decrease in free energy. Nonionic surfactants could give a more expanded film and allows rapid transportation of alcohol. Cationic and anionic surfactants reduce interfacial tension of water and oil in almost same amount as both the surfactants have C-12 structures. Tetradecyltrimethylammonium bromide shows more effective micro-emulsion formulation if propanol-1 as co-surfactant was used. The amount of co-surfactants used for the formulation of micro-emulsion decreases with increasing amount of the surfactants in all the systems. The influence of all the above factors depends upon phase continuity and composition of micro-emulsion.

Micro-emusification, co-surfactants, ternary phase diagram. Surfactant (Tween-20, TTAB, NaDeS.), Water-alcohol system,

"THE EFFECT OF ANIONIC (NaDeS) ,CATIONIC (TTAB) AND NONIONIC (TWEEN-20) SURFACTANTS IN OIL+ H2O+ALCOHOL (MEOH, PROH, BUOH ) SYSTEMS ON MICRO EMULSION", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.4, Issue 4, page no.594-601, April-2017, Available :http://www.jetir.org/papers/JETIR1704117.pdf

"THE EFFECT OF ANIONIC (NaDeS) ,CATIONIC (TTAB) AND NONIONIC (TWEEN-20) SURFACTANTS IN OIL+ H2O+ALCOHOL (MEOH, PROH, BUOH ) SYSTEMS ON MICRO EMULSION", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.4, Issue 4, page no. pp594-601, April-2017, Available at : http://www.jetir.org/papers/JETIR1704117.pdf