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OALib Journal期刊
ISSN: 2333-9721
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淬冷速率对聚氨酯多孔膜形态结构的影响
Keywords: 聚氨酯,热致相分离,多孔膜
Abstract:
？采用热致相分离（tips）技术制备了聚氨酯（pu）多孔膜，研究了成膜平台温度对多孔膜表面形态、孔度大小、孔隙率和透湿率的影响。在不同成膜温度下制备的pu多孔膜的共同特征是底面（与成膜平台的接触面）光滑平整，孔洞的尺度均小于相应的表面（与空气的接触面）。断面结构显示，pu多孔膜的内部疏松而多孔，孔之间相互连通，且存在较为规则的梯形条纹状（ladder-like）结构。以导热性较差的玻璃代替不锈钢成膜平台，在相同的条件下所得多孔膜的孔度、孔隙率和透湿率都明显增大。通过控制成膜温度、成膜平台材质等制备条件，可对pu多孔膜的形态结构、孔度大小、孔隙率和透湿率等性能进行剪裁。
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