Chinese Journal of Tissue Engineering Research ›› 2011, Vol. 15 ›› Issue (21): 3859-3862.doi: 10.3969/j.issn.1673-8225.2011.21.014

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Particle size and morphology characterization of polystyrene microspheres prepared by dispersion polymerization

Liang Bo1, Wu Lan-er1, Zhang Xue2   

  1. 1School of Materials Science and Engineering, Northern University of Nationalities, Yinchuan  750021, Ningxia Hui Autonomous Region, China
    2Logistic Department, Zhongwei Division of the People's Armed Police Force Corps, Zhongwei  755000, Ningxia Hui Autonomous Region, China
  • Received:2010-11-18 Revised:2010-12-10 Online:2011-05-21 Published:2011-05-21
  • About author:Liang Bo★, Master, Lecturer, School of Materials Science and Engineering, Northern University of Nationalities, Yinchuan 750021, Ningxia Hui Autonomous Region, China lbscu@126.com
  • Supported by:

    a grant by Northern University of Nationalities, No. 2009Y036*

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Abstract:

BACKGROUND: According to market needs, production of polystyrene microspheres with appropriate particle size is an important daily work of process technique control. Microspheres fabricated by dispersion polymerization have good mono-dispersion, the particle size can be synthesized from several hundred nanometers to a few microns.
OBJECTIVE: To investigate the influence of dispersing medium and monomer dosage of dispersion polymerization on the particle size the distribution width of the polystyrene microspheres.
METHODS: In the three-necked bottle with mechanical agitation and condensation tube import and export holes, a certain amount of polyvinylpyrrolidone, ethanol and water were added for pre-dispersion at 70 ℃ for 30 minutes, a monomer styrene dissolving azobisisobutyronitrile was slowly dropped, followed by a polymerization reaction at 70 ℃ for 8 hours, then centrifugation, washing and drying, thus monodisperse polymer microspheres were prepared. By scanning electron microscopy, the morphology of polystyrene microspheres was characterized, the particle size of polystyrene microspheres was measured by laser particle size analyzer.
RESULTS AND CONCLUSION: Using ethanol/water as the dispersing medium and certain amount of the monomer, the particle size of polystyrene microspheres prepared by dispersion polymerization was at a range of 1-2 μm, and the distribution width was 0.715-0.965.

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