中国组织工程研究

中国组织工程研究 ›› 2010, Vol. 14 ›› Issue (47): 8805-8808.doi: 10.3969/j.issn.1673-8225.2010.47.016

• 药物控释材料 drug delivery materials • 上一篇    下一篇

分散剂对悬浮法制备聚苯乙烯的影响及形貌分析

梁  博，韩凤兰，杨鹏元   

  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
  • 出版日期:2010-11-19 发布日期:2010-11-19
  • 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，主要从事医用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)，课题名称：聚甲基丙烯酸甲酯-聚苯乙烯复合微球的制备及表征。

Effect of dispersant on polystyrene preparation using suspension polymerization and morphology analysis

Liang Bo, Han Feng-lan, Yang Peng-yuan   

  1. College of Materials Science and Engineering, North University for Nationalities, Yinchuan   750021, Ningxia Hui Autonomous Region, China
  • Online:2010-11-19 Published:2010-11-19
  • About author:Liang Bo★, Master, Lecturer, College of Materials Science and Engineering, North University for Nationalities, Yinchuan 750021, Ningxia Hui Autonomous Region, China lbscu@126.com
  • Supported by:

    a grant by North University for Nationalities, No. 2009Y036*

PDF

609

被引次数

8

摘要：

背景：聚苯乙烯微球由于其比表面积大、吸附性强、力学性能好、反应性强、表面活性大以及可回收等特点，在固相有机合成、生物医用、高分子吸附、固载催化剂等方面有着广泛的应用前景。因此，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。
目的：观察分散剂用量、分散剂种类以及分散剂加入次数对聚苯乙烯微球分散性能的影响。
方法：以水为分散介质，在不加任何稳定剂的条件下，通过悬浮聚合法制备聚苯乙烯。称取各实验条件下的聚苯乙烯0.5 g，依次数出0.5 g的聚苯乙烯所含有的颗粒数，则相同质量的聚苯乙烯颗粒，颗粒数越多说明其颗粒尺寸越小。松下数码照相机观察聚苯乙烯颗粒的表面形貌及粒径分布。
结果与结论： ①随着分散剂用量的增加，聚苯乙烯的颗粒数也在增加，尤其当分散剂用量在0.8 g和1.0 g时，颗粒数增加幅度较大，从形貌图上可以看出颗粒尺寸急剧减小。②单独使用聚乙烯醇时随聚乙烯醇用量的增大，颗粒数显著增多，从形貌图上可以看出颗粒尺寸急剧减小，说明其具有良好的分散效果；单独使用磷酸钠或使用聚乙烯醇和磷酸钠的复合分散剂时，随着分散剂用量的增大，颗粒数反而减少，从形貌图上可以看出颗粒尺寸显著增大。③随着分散剂加入次数的增加，相同质量下聚苯乙烯的颗粒数也在增加。说明增加分散剂的补加次数，能在一定程度上增大分散剂的分散效果。

关键词: 悬浮聚合, 分散剂, 聚乙烯醇, 磷酸钠, 聚苯乙烯　

Abstract:

BACKGROUND: Polystyrene microspheres have been widely used in solid-phase organic synthesis, biomedical applications, polymeric absorption and supported catalyst based on high specific surface area, strong absorbability, good mechanical property, strong reactivity, great surface activity and recycling. Therefore it is a lasting and important task for daily process control to produce polystyrene microspheres at appropriate particle size according to market demand.
OBJECTIVE: To investigate the influence of dispersant amount, type and adding times on the dispersed properties of polystyrene microspheres.
METHODS: The polystyrene microspheres were prepared by suspension polymerization in water as dispersing medium, without adding any stabilizers. Polystyrene 0.5 g was weighed at all the experimental conditions to measure the number of the particles contained. As for the same quality of polystyrene particles, more particles contained indicated smaller particle size. The surface morphology and particle size distribution of polystyrene particles were observed under Panasonic digital camera.
RESULTS AND CONCLUSION: ① With the increasing amount of dispersing agent, the number of polystyrene particles also increased, especially at 0.8 g and 1.0 g dispersant, the number of particles sharply increased, particle size decreases rapidly in the topography. ② Using polyvinyl alcohol alone, the number of particles significantly increased along with the increasing amount of alcohol, the topography showed the particle size decreased sharply, indicating a good dispersion; Using sodium phosphate alone and using a compound dispersant of polyvinyl alcohol and sodium phosphate, the number of particles reduced along with the increase of dispersant, the topography showed that particle size significantly increased. ③ With the increasing times of adding dispersant, the number of polystyrene particles was also increasing under the same quality. The additional times increase may accelerate the dispersion effect of dispersants to some extent.

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