Preparation of open cellular PMMA microspheres by supercritical carbon dioxide foaming

被引：34
作者：
Huang, Shirong
Wu, Guozhong [1 ]
Chen, Shimou
机构：
[1] Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China
[2] Xiangtan Univ, Coll Chem Engn, Xiangtan 411105, Peoples R China
[3] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
来源：
JOURNAL OF SUPERCRITICAL FLUIDS | 2007年 / 40卷 / 02期
关键词：
PMMA microspheres; supercritical carbon dioxide; foaming; open cellular pores;
D O I：
10.1016/j.supflu.2006.06.005
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Poly(methyl methacrylate) (PMMA) microspheres with a nonporous skin and open cellular core structure were obtained by supercritical carbon dioxide foaming via a pressure quench method. The microspheres were characterized by particle size analyzer, scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Effects of foaming conditions such as CO2 pressure, temperature, and cell growth time on the particle size, size distribution, and morphology of the PMMA microspheres were investigated in detail. It was found that higher foaming temperature and higher pressure resulted in an increase of particle size. However, a longer cell growth time caused a decrease in size of the foamed PMMA microspheres. (C) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：323 / 329
页数：7
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