乳化-溶剂挥发法制备液体石蜡微胶囊

Polystyrene (PS) microcapsules containing liquid paraffin have been prepared by emulsion-solvent evaporation technique. The surface morphology, diameter distribution and chemical structure of the microcapsules were investigated by optical microscope (OM), laser particle size analyzer and FT-IR, respectively. The results indicated that when polyvinyl alcohol was selected as the emulsifying agent, the microcapsules had an average diameter of 150 μm, smooth surface morphology and fine dispersive properties. Size and distribution of PS microcapsules can be greatly adjusted by changing processing parameters, e.g., emulsifier concentration and feeding weight ratio of core/shell materials.