The Role of Fatty Acids Functional Group in Morinda citrifolia L. on Surface Tension and Diffusion Performance into Ink Particles

Abstract

The interaction of fatty acid of Morinda citrifolia L. (FAMC) with ink was studied using Hele Shaw Cells. The interaction is compared to that of fatty acid derivates of synthetic surfactant. These interactions are modeled and explained through micro diffusion and its viscous fingering character. The results show that the molecule structure and the number of double bonds have a special effect on the surface tension and the micro diffusion character. FAMC at six-hour extraction has the highest speed of interaction and highest perimeter of diffusion among synthetic surfactants and other fatty acids in Morinda citrifolia L.