title: One-Step Synthesis of Hollow Dimpled Polystyrene Microparticles by Dispersion Polymerization.
abstract: The design and preparation of hollow nonspherical microparticles are of great significance for their potential applications, but the development of a facile synthetic method using only one production step remains a great challenge. In the current work, a new template-free method based on dispersion polymerization was successfully developed to produce anisotropic hollow polystyrene (PS) microparticles in a single step. In the synthesis, ammonium persulfate (APS) played a critical role in the formation and growth of highly uniform and stable hollow PS microparticles. By varying the concentration of APS and that of the stabilizer used, polyvinylpyrrolidone, we were able to control the average size of the PS particles and their degree of concavity. Based on our results and observations, a plausible mechanism for formation of these unusually shaped PS microparticles was proposed.
authors.affiliation: Department of Polymer Engineering, Pukyong National University , 365 Sinseon-ro, Nam-gu, Busan 64547, Republic of Korea.
authors.forename: Sung Hwan
authors.initials: SH
authors.lastname: Park
authors.affiliation: Department of Polymer Engineering, Pukyong National University , 365 Sinseon-ro, Nam-gu, Busan 64547, Republic of Korea.
authors.forename: Jinwoo
authors.initials: J
authors.lastname: Kim
authors.affiliation: Reliability Assessment Center for Chemical Materials, Korea Research Institute of Chemical Technology (KRICT) , 141 Gajeong-ro, Yuseong-gu, Daejeon 305-600, Republic of Korea.
authors.forename: Wang-Eun
authors.initials: WE
authors.lastname: Lee
authors.affiliation: Reliability Assessment Center for Chemical Materials, Korea Research Institute of Chemical Technology (KRICT) , 141 Gajeong-ro, Yuseong-gu, Daejeon 305-600, Republic of Korea.
authors.forename: Doo-Jin
authors.initials: DJ
authors.lastname: Byun
authors.affiliation: Department of Polymer Engineering, Pukyong National University , 365 Sinseon-ro, Nam-gu, Busan 64547, Republic of Korea.
authors.forename: Mun Ho
authors.identifier: 0000-0003-0745-7700
authors.initials: MH
authors.lastname: Kim