|Pan, Zhongli - John|
Submitted to: Proceedings of the American Society of Agricultural and Biological Engineers International (ASABE)
Publication Type: Proceedings
Publication Acceptance Date: 5/9/2006
Publication Date: 7/9/2006
Citation: Li, B., Meng, X., Pan, Z., Zhang, Y. 2006. Microencapsulation of multiple-layer emulsion with high-voltage electrostatic field. Proceedings of the American Society of Agricultural and Biological Engineers International (ASABE). Paper No. 066106:1-7. St. Joseph, Mich. Interpretive Summary: A high-voltage electrostatic field apparatus was used to produce water-oil-water multiple-layer emulsion. The effect of processing parameters of the high-voltage electrostatic microencapsulation system on the quality of microparticles was investigated.
Technical Abstract: Water-soluble materials are widely used in the applications of agriculture, food and pharmaceuticals. The objective of this study was to investigate a new microencapsulation method to produce water-soluble materials. A high-voltage electrostatic field apparatus was used to produce such materials represented by water-oil-water multiple-layer emulsion. The inner solution was distilled water which was deputized as water-soluble materials, the oil phase was liquid paraffin, and external aqueous phase was sodium alginate (NaAlg) solution. Influences of voltage, distance between pinhead and reaction liquid surface, pushing speed, prime emulsion/external aqueous, and NaAlg concentration on microcapsule sizes were studied. The results indicated that voltage, distance and NaAlg concentration had much greater influences than other studied factors. The optimum conditions of microencapsulation were voltage of 3.0~4.0kV distance of 2.5~5cm and NaAlg concentration of 0.6~1.2%. The sizes of obtained microcapsules ranged from 50 to 1000 µm in diameter. It was concluded that water-soluble materials could be microencapsulated using the emulsification and high-voltage electrostatic field method to achieve various sizes and shapes.