不同溶剂对不对称聚砜(psf)膜分离co2 / ch4的影响

N. F. A. Rozuki, Muhammad Hanis Tajuddin, N. Yusof
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引用次数: 10

摘要

采用聚砜(PSf)与nmethyl -2-吡咯烷酮(NMP)混合制备了用于CO2/CH4分离的不对称膜溶液。将挥发性溶剂四氢呋喃(THF)以不同的负载量(0 ~ 75%)引入铸造液中,通过干湿相转化法形成高气体分离性能的不对称膜。采用扫描电镜(SEM)、傅里叶红外光谱(FTIR)和透气性测试对制备的膜进行了表征。以NMP为溶剂的膜的SEM图像具有最厚的致密层,而以THF为溶剂的膜具有最薄的膜厚度。FTIR结果表明,在波长1170 cm-1和2969 cm-1处分别存在二氧化硫(SO2)和甲基(CH3)基团,验证了PSf作为聚合物的使用。在气体渗透试验中,以四氢呋喃为溶剂的CO2/CH4选择性最高,渗透率最低。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
EFFECT OF DIFFERENT SOLVENT ON ASYMMETRIC POLYSULFONE (PSF) MEMBRANES FOR CO2/CH4 SEPARATION
The asymmetric membranes solution were developed for CO2/CH4 separation by mixing polysulfone (PSf) with NMethyl-2-pyrrolidone (NMP). A volatile solvent, Tetrahydrofuran (THF) was introduced into the casting solution by various loading (0 to 75%) to form a high gas separation performance of asymmetric membranes via dry/wet phase inversion method. The produced membranes were characterized using Scanning Electron Microscopic (SEM), Fourier Transform Infrared Spectroscopy (FTIR) and gas permeability test. SEM images of a membrane with NMP as a solvent has the thickest dense layer while a membrane with THF as a solvent has the thinnest thickness of the membrane. FTIR results indicating the present of sulfur dioxide (SO2) and methyl (CH3) group at wavelength 1170 cm-1 and 2969 cm-1 respectively verifying the use of PSf as a polymer. As for gas permeation test, the used of THF as a solvent shows the highest CO2/CH4 selectivity with the lowest permeability.
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