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材料研究学报  2007, Vol. 21 Issue (3): 300-304    
  论文 本期目录 | 过刊浏览 |
采用聚醚酯制备多孔支架的条件控制
问县芳  张爱英  王连才  冯增国
引用本文:

问县芳; 张爱英; 王连才; 冯增国 . 采用聚醚酯制备多孔支架的条件控制[J]. 材料研究学报, 2007, 21(3): 300-304.

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摘要: 采用热致相分离(TIPS)结合冷冻干燥技术制备了聚醚酯(聚对苯二甲酸丁二醇酯-co-聚对苯二甲酸环己烷二甲醇酯-b-聚乙二醇)(PTCG)多孔支架,研究了聚合物质量浓度、粗化温度和溶剂组成等相分离参数对多孔支架形貌结构的影响.结果表明,制备出的多孔支架孔间相互贯通,支架表面(与空气接触面)的孔径大于底面(与玻璃接触面)的孔径;随着聚合物质量浓度的增大,支架的孔径和孔隙率减小.由于分相过程中热力学推动力增大和相区融合阻力增加的相互作用,孔径随着粗化温度的降低呈现先升后降的趋势,并在0℃时出现最大值.在DO中加入不良溶剂H2O,溶液分相温度的升高导致多孔支架孔径的增大.通过控制相分离参数可以制备不同形貌结构的PTCG多孔支架.
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收稿日期: 1900-01-01     
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