中国组织工程研究

中国组织工程研究 ›› 2011, Vol. 15 ›› Issue (21): 3859-3862.doi: 10.3969/j.issn.1673-8225.2011.21.014

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分散聚合法制备聚苯乙烯微球及微球粒度与形貌表征

梁  博1，吴澜尔1，张  学2   

  1. 1北方民族大学材料科学与工程学院，宁夏回族自治区银川市 750021
    2宁夏武警总队中卫市支队后勤处，宁夏回族自治区中卫市 755000
  • 收稿日期:2010-11-18 修回日期:2010-12-10 出版日期:2011-05-21 发布日期:2011-05-21
  • 作者简介:梁博★，女，1980年生，新疆维吾尔自治区奎屯市人，汉族，2005年四川大学毕业，硕士，讲师，主要从事功能高分子材料方向的研究。 lbscu@126.com
  • 基金资助:

    北方民族大学校级课题(2009Y036)。

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*

PDF

722

被引次数

10

摘要：

背景：根据市场需要，生产适当粒度的聚苯乙烯微球是日常工艺控制的一项重要工作。分散聚合得到的微球具有很好的单一分散性，其粒径在几百个纳米到几个微米之间。
目的：观察分散聚合法中分散介质及单体用量对聚苯乙烯微球粒径与分布宽度的影响。
方法：在配有机械搅拌和冷凝管进出口的三颈瓶中，加入一定量的聚乙烯基吡咯烷酮、无水乙醇和水，在70 ℃下预分散    30 min，缓慢滴加入溶有偶氮二异丁腈的单体苯乙烯，在70 ℃下聚合反应8 h，经离心、洗涤、干燥后即得聚合物微球。通过扫描电镜对聚苯乙烯微球进行了形貌表征，激光粒度分析仪测量聚苯乙烯微球的粒径。
结果与结论：当使用一定配比的混合介质无水乙醇和水，在一定的单体用量下，用分散聚合法能制得粒径在1.0~2.0 μm之间，分布宽度在0.715~0.965之间，粒径分布较为均匀的聚苯乙烯微球。

关键词: 分散聚合, 聚苯乙烯, 微球, 粒径, 分散介质

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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