화학공학소재연구정보센터
Industrial & Engineering Chemistry Research, Vol.58, No.19, 8140-8147, 2019
Tailoring Emulsion Polymerization for High-Yield Synthesis of Tween 80 Stabilized Magnetic Cross-Linked Polystyrene Nanocomposite Particles
Tween 80 coated magnetic polymer nanocomposite particles (NCPs), as functional materials with good biological application prospects, still confront a challenge in high-yield preparation inhibiting either plain polymer particles or aggregates. In this study, we are devoted to make a breakthrough by using emulsion polymerization solely stabilized by nonionic surfactant Tween 80 and initiated by an oil-soluble initiator, 2,2'-azobis(isobutyronitrile). After carefully investigating the effects of Fe3O4, monomer, initiator, and emulsifier dosages on the monomer conversion, encapsulation efficiency, and particle characteristics, we confirm that a low but sufficient Tween 80 dosage relative to the Fe3O4 dosage enables the high-yield synthesis of NCPs. Using a micromixing method to prepare colloidal Fe3O4 clusters at the reduced Tween 80 concentration allows for the production of monodispersed NCPs with considerable monomer conversion and total encapsulation. The mechanism to achieve controlled NCPs synthesis is also revealed by monitoring and analyzing the time profiles of monomer conversion and products morphology.