Original Articles: 2011 Vol: 3 Issue: 6
Fabrication of starch-based microparticles by an emulsification crosslinking method
In this study, starch-based microparticles (MPs) fabricated by a water-inwater (w/w) emulsification crosslinking method could be used as a controlled release delivery vehicle for food bioactives. Due to the processing route without the use of toxic organic solvents, it is expected that these microparticles can be used as delivery vehicles for controlled release of food bioactives. Octenyl succinic anhydride (OSA) starch was used as raw material. Optical microscopy showed OSA starch-based microparticles (OSA-MPs) had a good dispersibility. Scanning electron microscopy (SEM) showed OSA-MPs had a solid structure and spherical shape. X-ray diffraction (XRD) patterns revealed that OSA-MPs were of amorphous structure. Considering the analytical result, it appeared that the OSA starch concentration, poly (ethylene glycol) (PEG) molecular weight, volume ratio of dispersed phase/continuous phase and PEG concentration had significant effect on particle size.