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- W2360893119 abstract "The single-layer asymmetric hollow fiber membranes made from polyimide-6FDA-mPDA and the dual-layer asymmetric hollow fiber membranes with the selectivity layer made from polyimide-Matrimid⑧ 5218 were prepared with the thickness range of 0.09~0.21 μm. The physical aging phenomenon of the prepared asymmetric hollow fiber membranes was studied, and the gas permeability varying with time for gases of O2, N2, CH4 and CO2 were tested. Experimental results show that, during physical aging, the gas permeance decrease and the selectivities increase, while finally both come to a state of equilibrium. According to the characteristic of ultra-thin dense skins, a mathematical model based on the free volume diffusion mechanism was developed to describe the physical aging of the hollow fiber membranes. The results show that, according to the model developed, the results calculated agree well with the experimental results. It indicates that the free volume diffusion mechanism can be used to describe the physical aging phenomenon of the hollow fiber membranes with ultra-thin dense skins." @default.
- W2360893119 created "2016-06-24" @default.
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- W2360893119 date "2010-01-01" @default.
- W2360893119 modified "2023-09-25" @default.
- W2360893119 title "The Physical Aging Phenomenon of Polyimide Hollow Fiber Membranes for Gas Separation" @default.
- W2360893119 hasPublicationYear "2010" @default.
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