THE FABRICATION OF HOLLOW PLASTIC MICROSPHERES BY MICROENCAPSULATION METHOD

Polystyrene(PS)was used as the material for the fabrication of hollow microspheres. The factors such as the emulsifying rotating speed, the concentration of solution, the volume ratio of water/organic phases, the temperature and vacuum of operation were studied. PS microspheres with diameter from 100 to 30opm and wall thickness of 2 to 8μm were successfully produced. Their concentricity, sphericity and surface roughnesses are typically less than 5%, 10% and 3oonm respectively.