氧化铝中空纤维膜的制备与表征

Preparation and Characterization of Alumina Hollow Fiber Membrane

介绍了铝氧化反应结合技术与干湿法纺丝工艺相结合制备氧化铝中空纤维膜的方法 .采用热重分析、能量色散谱、X射线衍射、热机械分析和扫描电镜等手段对烧结过程中的反应行为、相转变及膜的微观结构进行了研究 .结果表明 ,所制备的氧化铝中空纤维膜具有非对称结构的特点 ,其孔隙率高 (5 0 1% )、孔径分布窄 (平均孔径0 88μm)、机械强度高 (压缩强度和弯曲强度分别为 89 6和 41 1MPa) .气体的渗透实验结果表明 ,所制备的膜无针孔、裂纹等缺陷 。

The preparation method of alumina hollow fiber membrane by reaction bonding of aluminum oxide (RBAO) technique combined with dry-wet spinning process was introduced in this paper. The reaction behavior, phase transition and microstructure of the membrane were investigated by different techniques, such as thermogravimetric analysis, energy dispersive spectroscopy, X-ray diffraction, thermomechanical analysis and scanning electron microscopy. The structure of alumina hollow fiber membrane is asymmetrical. The porosity and mean pore size of the membrane are 50.1% and 0.88 mum respectively. The compress strength and bending strength are 89.6 and 41.1 MPa respectively. It was shown that the prepared membrane has high porosity, narrow pore size distribution and improved mechanical properties. The results of permeation test for H-2, N-2 and Ar exhibited that the membrane is free of defects or cracks and has good permeability.