【摘要】 首先采用聚矾/二甲基乙酰胺/水体系,按照Loeb-Sourirajan 工艺制备了两种聚砜非对称中空纤维膜;后经硅橡胶表面涂层制成了硅橡胶—聚砜非对称中空纤维复合膜。实验测定了它们对H₂、CO₂、O₂和N₂等气体的渗透率在不同温度（10℃～40℃）下随渗透压力（2kg/cm²～12kg/cm²）的变化。通过计算得到各种气体通过两种复合膜的表观活化能。结果指出,非对称复合膜对气体的渗透分离性能,除表面涂层和致密层外,支撑层的结构和厚度也影响气体的渗透行为,尤其对快气的渗透性能影响更大,使气体通过不同结构的非对称复合膜时,表观活化能有很大差别。操作温度也会直接影响气体通过复合膜的渗透分离性能。更多还原

【Abstract】 Manufactured two kinds of polysulfone asymmetic hollow fibermembranes according to the technique of Loeb-Sourirajan,from thesystem of polysulfone/dimethylacefamide/water; the silicone rubber-polysulfone asymmetric hollow fibre composite membranes were madeby surface coating with silicone rubber.The experiment measured thechange to the permeability of the composite membranes for hydrogen,carbon dioxide,oxygen and nitrogen under the different temperature(10℃—40℃)with permeable pressure (2kg/cm~2—12kg/cm~2)。Thetemperature dependence of the permeability yielded activation energiesof different gases passing throught the two kinds of compositemembranes.The results showed that the permeaselective behaviousof gases in the asymmetric composite membrane,besides surfacecoating layer and dense skin layer, are still influenced by thestructure and shickness of the supporting lager,especially,for thepermeable behavions of fast gases.The ackiuation energies of gaseshave greatly different as the gases pass throngh the asymmetriccomposite membranes having different structure.The operatingtemperature seriously influence the separation of the asymmetriccomposite membrane for fast gases.更多还原