Watcharee Khunkitti, Chantana Aromdee, Suwanna Vorarat and Padungkwan Chitropas

pp. 145 - 155

Abstract

Due to the physicochemical properties of jackfruit (JK) seed starch, it is interesting to use jackfruit mucilage for cosmetic application. The aim of this study was to investigate the physical properties and the effectiveness of JK mucilage at the range of 1 to 5% w/v for using as suspending agent and emulsifying agent. It was found that the pH of 3% w/v JK mucilage was 4.63±0.11. At the concentrations lower than 3% w/v the
mucilage exhibited newtonian flow whereas at higher concentration the mucilage showed pseudoplastic with thixotropic flow. As increased the concentration of JK mucilage, the surface tension of purified water was
reduced to the range of 1.77-3.8 mN/m and the interfacial tension between water and mineral oil was reduced to the range of 9.07-12.43 mN/m. The viscosity of the mucilage was reduced dramatically in acid pH but
in salt solution at the concentrations lower than 2% w/v, the viscosity was increased. In addition, the JK mucilage was able to flocculate Titanium dioxide. Even though the JK mucilage was able to thicken the external phase of emulsion, it exhibited as a poor emulsifier. The JK mucilage, therefore, has the potential for
use as a suspending agent and thickening agent in cosmetic products.

Keywords

• jackfruit mucilage
• surface tension
• interfacial tension
• suspending agent
• thickening agent