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《Chemical Research In Chinese Universities》 2001-05
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Sol-gel Derived Inorganic/Organic Hybrid Separation Membrane

ZHANG Guo Chang, CHEN Yun Fa *, WU Zhen Jiang, XIE Yu Sheng (Institute of Chemical Metallurgy, Chinese Academy of Sciences, Beijing 100080, China)  
Organic/inorganic hybrid separation membranes have been prepared on porous α Al 2O 3 substrates (pore size, 1—10 μm). The effects of sol synthesis conditions, such as reaction temperature, solvent pH, sol viscosity, n (PTMOS)/ n (TEOS) and n (H 2O)/ n (alkoxide) ratios, on the layer processing and its performance of the resulted membrane were characterized, and an optimum condition of the procedure was achieved. From FTIR spectra, it is found that the crack formation in the membrane is principally related to the structure of the Si—O—Si other than the solvent nature and any other factors. The thickness of the hybrid layer is about 1~2 μm estimated by the SEM image of cross section. The selectivity of O 2/N 2 and CO 2/N 2 as well as CO 2/O 2 is 2.30, 4.31 and 1.17 respectively, and the permeability is 75.81×10 -17 , 75.28× 10 -17 and 72.78×10 -17 m 3(STP)·m/(m 2·s·Pa) when the trans membrane pressure difference is 0.10 MPa and the n (PTMOS)/ n (TEOS) ratio is equal to 1.16.
【Fund】: 中国科学院院长基金! (批准号 :院基计 72 4号 )资助
【CateGory Index】: TQ028.8
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