应用化学 ›› 1997, Vol. 0 ›› Issue (5): 74-76.

• 研究论文 • 上一篇    下一篇

大粒径磁性高分子微球的制备

邱广明1, 邱广亮2   

  1. 1. 内蒙古工业大学电力学院动力系, 呼和浩特 010022;
    2. 内蒙古师范大学生物系, 呼和浩特 010022
  • 收稿日期:1996-11-25 修回日期:1997-06-11 出版日期:1997-10-10 发布日期:1997-10-10
  • 基金资助:
    内蒙古自然科学基金

Preparation of Large Magnetic Polymer Microspheres

Qiu Guangming1, Qiu Guangliang2   

  1. 1. College of Electric Power, Inner Mogolia University of Technology, Huhhot;
    2. Department of Biology, Inner Mogolia Nomal University, Huhhot 010030
  • Received:1996-11-25 Revised:1997-06-11 Published:1997-10-10 Online:1997-10-10

摘要: 制备磁性高分子微球的关键在于如何才能在无机磁性颗粒(Fe3O4)表面形成高分子外壳.蛋白质和多糖等天然高分子易于在磁粒子表面形成外壳, 而聚苯乙烯等疏水性高分子则较难[1, 2]. 粒径的控制是磁性微球研究的重要方面, 聚合方法不同微球的粒径范围有所不同[3, 4].本文以聚乙二醇为分散稳定剂, 改善了磁性氧化铁粒子的稳定性和表面的亲疏水环境, 采用预先吸附-溶胀的办法, 在磁性氧化铁粒子表面积聚了足够的引发剂(K2S2O8)和苯乙烯等单体,确保单体聚合围绕着磁粒子表面进行, 制备出粒径较大且分布均匀的磁性聚苯乙烯微球。

关键词: 高分子磁性微球, 苯乙烯, 丙烯酸, 共聚物, 制备

Abstract: Copolymerization of styrene and acrylic acid in ethanol-water medium dispersed with magnetite particles of 30 nm diameter was carried out using potassium persulfate as initiator. The affinity among the magnetite particles, monomers and initiators was improved by coating the magnetite particles with polyethylene glycol. The effects of polyethylene glycol, dispersion medium, initiator and polymerization time on the formation of magnetic polymer microspheres have been investigated. Magnetic polymer microspheres of 30~1000 μm diameter were prepared.

Key words: polymeric magnetic microsphere, styrene, acrylic acid, copolymer, preparation