THE INFLUENCE OF ADDITION CONCENTRATION OF SURFACTANTudABS (ALKYLBENZENE SUFONATE) ON SURFACE TENSION VALUESudOF 4 STROKE ENDURO LUBRICANTS

摘要

The aim of this research is to determine the effect of ABS (AlkybenzeneudSulfonate) surfactant molarity on the surface tension of the lubricant 4 strokeudEnduro, and to determine the effect of ABS surfactant volume fractions on the 4udstroke enduro lubricant surface tension.udTo determine the value of the surface tension of the lubricant 4 strokeudEnduro used Du Nouy ring method. The surfactant used is ABS with audconcentration of 0.5 M, 0.75 M and 1 M at each concentration in the input intoudthe lubricants with volume fractions is 2%, 4%, 6%, 8%, 10 %, 15%, 20%, 25%,udand 30%.udThe results show that the smaller the surfactant molarity the higher theudsurface tension of Enduro 4 stroke lubricant. However there are someudmismatches.This may be due to the creation of small agregates or posibly inverseudmicelles. The motion of these agregates causes the concentration of surfactantudmoleculs around the surface to fluctuative. This fluctuation of concentration ofudsurfactant molecules also causes the surface tension to fluctuate. The same reasonudgoes to surface tension fluctuation due to the additional of volume fraction.