Fabrication of PS-RF double-layered hollow microspheres
Based on interfacial polymerization reaction,PS-RF double shell microspheres were synthesized using polystyrene(PS) hollow microspheres as template,RF solution as precursor and dibutyl phthalate as dispersant.The factors,such as the choice of RF solution and oil,prepolymerization time,stirring rate and solidification temperature,which affect the process,have been preliminarily discussed.As the polymerization reaction was occurring in the following conditions: RF solution was 25%,the molar ratio of resorcinol to sodium carbonate was 100,prepolymerization time was 24 hours,stirring rate was 120～200 r/min,and solidification temperature was 35 ℃,the experiment has fabricated PS-RF double-layered hollow microsphere,whose degree of sphericity and concentricity are over 95% and the surface finish is less than 10 nm.