An Experimental Approach to the Surface Properties of Biodiesel Components and Their Mixtures with Some Alcohols

The surface tensions were measured for pure and binary mixtures of methyl caprate and ethyl myristate with 2-butanol and 1,2butandiol over the 0 to 1 composition range and at nine different temperatures between 293.15 K and 333.15 K with an interval of 5 K and at atmospheric pressure. Surface tension was measured by capillary rise method using a homemade capillary apparatus, in which the liquid/vapor equilibration can be accomplished and maintained practically. Concentration dependent surface entropy and surface energy of the solutions were calculated and studied The magnitude of surface tension data have been used to discuss the intermolecular forces in mixtures