E. S. Liubimava, T. A. Hliavitskaya, A. V. Bildyukevich
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Production of Hollow Fiber Gas Separation Membranes by Interfacial Polycondensation
The work is devoted to the fabrication of hollow fiber thin-layer composite gas separation membranes with an internal selective layer using interfacial polycondensation followed by deposition of a polydimethylsiloxane (PDMS) layer on a polysulfone membrane substrate. The effect of the concentration of amine (triethylenetetramine (TETA)) and acyl (isophthaloyl chloride (IPC)) components and the conditions of PDMS layer deposition on the change in the gas permeability of composite membranes in O2/N2 separation was studied. It was found that after forming the selective layer by the interfacial polycondensation method, hollow fibers with high gas permeability values (≥1000 GPU) were obtained regardless of the monomers used and their concentration, with the O2/N2 separation factor α being about 1. After applying an additional layer using 1–3 wt % PDMS solutions, the separation factor was 1.5–3.7. The maximum value of the separation factor was found in a fairly narrow range of TETA concentrations (0.15–0.6%) and at a certain equivalent TETA/IPC ratio. The first maximum (α O2/N2 = 3.5) is observed at a weight concentration ratio of TETA/IPC = 0.15/0.26, and the second maximum, at the concentration ratio of TETA/IPC = 0.6/0.15, with the permeability of the composite membranes for oxygen being 107 and 76 GPU, respectively.
期刊介绍：
The journal Membranes and Membrane Technologies publishes original research articles and reviews devoted to scientific research and technological advancements in the field of membranes and membrane technologies, including the following main topics:novel membrane materials and creation of highly efficient polymeric and inorganic membranes;hybrid membranes, nanocomposites, and nanostructured membranes;aqueous and nonaqueous filtration processes (micro-, ultra-, and nanofiltration; reverse osmosis);gas separation;electromembrane processes and fuel cells;membrane pervaporation and membrane distillation;membrane catalysis and membrane reactors;water desalination and wastewater treatment;hybrid membrane processes;membrane sensors;membrane extraction and membrane emulsification;mathematical simulation of porous structures and membrane separation processes;membrane characterization;membrane technologies in industry (energy, mineral extraction, pharmaceutics and medicine, chemistry and petroleum chemistry, food industry, and others);membranes and protection of environment (“green chemistry”).The journal has been published in Russian already for several years, English translations of the content used to be integrated in the journal Petroleum Chemistry. This journal is a split off with additional topics.
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