Preparation and characterization of alumina hollow fiber membrane

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 m icrostructure of the membrane were investigated by different techniques, su ch as thermogravimetric analysis, energy dispersive spectroscopy, X-ray dif fraction, thermomechanical analysis and scanning electron microscopy. The s tructure 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 co mpress 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 d istribution and improved mechanical properties. The results of permeation t est for H-2, N-2 and Ar exhibited that the membrane is free of defects or c racks and has good permeability.