| 초록 |
Synthesis of hollow non-spherical microparticles have great potential applications, but the development of one step facile synthetic method remains a great challenge. In our work, a new template-free method based on dispersion polymerization was developed to produce anisotropic hollow polystyrene (PS) microparticles in a single step. The polymerization of styrene monomers was conducted at 70 ºC using ammonium persulfate (APS) as a radical initiator, and poly-vinylpyrrolidone (PVP) as a steric stabilizer. By varying the concentration of APS and polymerization time, we were able to control the average size of the PS particles and their degree of concavity. This method was carried out in as single-phase medium with highly reproducibility, without requiring an additional template removal step, yielding hollow and dimpled PS microparticles in bulk quantities. Finally, the microparticles were highly uniform in size and showed excellent stability. |
