| Abstrakt: |
In this study, multiple emulsions stabilized by hydrophobic-hydrophilic cellulose particles from oil palm empty fruit bunch were studied. The responsiveness of the emulsions to pH and the influenced on the release of encapsulated vitamin B9 was studied using high performance liquid chromatography. The cellulose was characterized using Fourier transform infrared spectroscopy, scanning electron microscope, energy-dispersive X-ray spectroscopy, thermogravimetric analysis, differential thermogravimetric and X-ray diffraction. The result showed that crystallinity of native cellulose and modified cellulose were 66.12% and 61.38%, respectively. The emulsions stabilized by hydrophobic-hydrophilic cellulose particles showed unique responsiveness at pH 2, 4 and 7. The droplet size of the emulsion and the release of active constituent (vitamin B9) depends on the pH. The encapsulation efficiency of w/o/w multiple emulsions at pH 4 and 7 was 78.41% and 65.95%, respectively. The result showed that the release of active constituent from w/o/w multiple emulsions can be controlled based on the responsiveness to pH, to develop fascinating new applications for some specific foods, pharmaceuticals, and drug release. [ABSTRACT FROM AUTHOR] |
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