期刊
SCIENCE PROGRESS
卷 106, 期 1, 页码 -出版社
SAGE PUBLICATIONS LTD
DOI: 10.1177/00368504231156295
关键词
Blend membranes; CO2 separation; gas permeation; Pebax; PEG
Developing blend membrane materials is an effective way to improve the gas separation efficiency and commercial potential of membrane technologies. In this study, free-standing membranes were prepared using Pebax-1074 as the polymer matrix and poly(ethylene glycol) (PEG) as fillers. The addition of PEG significantly improved the structural and separation performance of the blend membranes. The optimal CO2 permeability and CO2/N-2 selectivity were achieved under specific conditions.
Developing blend membrane material is one feasible and effective route for improving the gas separation efficiency and commercial attractiveness of membrane technologies. Here, free-standing membranes were prepared by casting method using Pebax-1074 as continuous polymer matrix and poly(ethylene glycol) (PEG) as dispersive organic fillers. The morphology, surface functional groups, microstructure and thermal stability of the membranes were characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, thermogravimetric analysis and differential scanning calorimetry, respectively. The effects of preparation variables including average molecular weight and dosage of PEG on the microstructure, morphology and properties of the blend membranes were investigated. In addition, the effects of operation conditions including permeation temperature and permeation pressure on the gas separation performance of the blend membranes were also examined. The results showed that the addition of PEG can obviously modify the structure-properties and significantly improve the separation performance of resultant membranes. Under the conditions of 30 degrees C and 0.25 MPa, the optimal CO2 permeability and CO2/N-2 selectivity respectively reached to 124.3Barrer and 115.8 for the blend membranes made by PEG600 with a content of 20% in Pebax-1074 matrix. In brief, the as-prepared blend membranes are proved to be promising for CO2/N-2 separation application.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据