Preparation of Silane Modified ZSM-5 Zeolite/BPPO Asymmetric Membrane and Its Pervaporation Performance
有机硅烷改性ZSM-5/BPPO非对称膜制备及其渗透汽化性能

With silane modified ZSM-5 zeolite as filling agent,ZSM-5/BPPO bromide poly(2,6-dimethyl-1,4-phenylene oxide)] asymmetric membrane was successfully prepared by phase inversion process.The SEM and AFM images showed that the zeolite was uniformly distributed within the membrane,and the ZSM-5/BPPO membrane had a higher surface roughness.The analysis of contact angel showed that the ZAM-5/BPPO membrane was more hydrophobic than the BPPO membrane.The effects of ZSM-5 content,feed solution concentration and temperature on the pervaporation performance of dilute ethanol-water solution were examined.The results showed that the separation performance of ZSM-5/BPPO membrane was excellent.With increasing of ethanol concentration in feed solution,the membrane selectivity decreased,while the permeation flux increased.With increasing of feed solution temperature,both the separation factor and the permeation flux increased.When the ZSM-5 content was 0.3%(ω),feed concentration 5%(ω) and feed solution temperature 60℃,the total permeation flux and separation factor could reach 529.69 g/(m2·h) and 18.49,respectively.The pervaporation performance of ZSM-5/BPPO membrane on different alcohol-water mixtures showed that the higher the alcohol molecular weight,the better the separation performance.