Soap-free Synthesis of Monodisperse Polymer Particles
Current research of soap-free emulsion polymerization, which is suitable for the synthesis of polymer particles with high purity, is reported together with fundamental aspects concerning the mechanism of this polymerization. Conventional methods of soap-free emulsion polymerization were only applicable to the synthesis of monodisperse submicron-sized polymer articles. According to the mechanism of particle formation in the polymerization, resultant particle size distributions are expected to be strongly dependent on particle coagulation that can be controlled by electrostatic interaction between particles. This basic concept for the particle formation has led to development of a new type of soap-free emulsion polymerization that employs an amphoteric initiator in combination with pH control. This method has enabled the production of highly monodisperse polystyrene particles up to 3μm in a single stage polymerization. Larger particles can be produced with a simple method of monomer addition to polymerization system after the formation of particles. The soap-free emulsion polymerization is also applicable to the polymerization of methyl methacrylate. Recent work has shown that soap-free polymerization methods are widely applied to the synthesis of monodisperse composite particles. The examples described are magnetic polymer latex, fluorescent polymer particles, silica/polystyrene core-shell particles, SiO2/TiO2 hollow core-shell particles and multilayered gold/silica/polystyrene core-shell particles.
Mikio Konno Daisuke Nagao Shunchao Gu
Tohoku University, Department of Chemical Engineering, Tohoku University 6-6-07 Aoba, Aramaki-aza, A Shanghai Jiotong University, School of Chemistry and Chemical Technology, ,800 Dongchuan Road, Shang
国际会议
第四届中日化工学术研讨会(The 4th Joint China/Japan Chemical Engineering Symposium)(CJCES)
成都
英文
2007-12-19（万方平台首次上网日期，不代表论文的发表时间）