Study of Preparation for Double Hollow Microspheres With Diameter of 500-700μm

Adopting ozone modified polystyrene (PS) microsphere technique and optimizing technique of the structure of lobed wheels, the interaction between PS and poly-vinyl alcohol (PVA) was improved, and the flow field movement was also ameliorated. PS-PVA double hollow microspheres with diameter of 500-700 μm were prepared, and the influence of density matching between initial emulsion particle and solvent on the uniformity of PVA layer was systematically studied. The results show that density contrast of solvent particle about 0.015-0.020 g/cm³ at 20 ℃ and 0.010 g/cm³ at 37 ℃ can form well homogeneous PVA layers.