Aging of Thin-Film Composite Membranes Based on Crosslinked PTMSP/PEI Loaded with Highly Porous Carbon Nanoparticles of Infrared Pyrolyzed Polyacrylonitrile
| Autor: | S. D. Bazhenov, G. P. Karpacheva, S. V. Makaev, D. S. Bakhtin, Victoria Polevaya, E. A. Grushevenko, Vladimir Volkov, Alexey Volkov |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Composite number Filtration and Separation 02 engineering and technology Permeance 010402 general chemistry porous carbon filler lcsh:Chemical technology 01 natural sciences Article chemistry.chemical_compound Thin-film composite membrane thin-film composite membranes infrared pyrolyzed polyacrylonitrile hybrid materials Chemical Engineering (miscellaneous) lcsh:TP1-1185 lcsh:Chemical engineering Porosity Process Chemistry and Technology aging Polyacrylonitrile lcsh:TP155-156 021001 nanoscience & nanotechnology 0104 chemical sciences Membrane Chemical engineering chemistry Acrylonitrile crosslinked PTMSP 0210 nano-technology Hybrid material |
| Zdroj: | Membranes, Vol 10, Iss 419, p 419 (2020) Membranes Volume 10 Issue 12 |
| ISSN: | 2077-0375 |
| Popis: | The mitigation of the physical aging of thin-film composite (TFC) poly[1-trimethylsilyl-1-propyne] (PTMSP) membranes was studied via the simultaneous application of a polymer-selective layer crosslinking and mixed-matrix membrane approach. For the first time, a recently developed highly porous activated carbon material (infrared (IR) pyrolyzed poly[acrylonitrile] (PAN) or IR-PAN-a) was investigated as an additive to a PTMSP-selective layer for the reduction of aging in TFC membranes. The total electric energy spent on the IR irradiation treatment of IR-PAN-a particles was twice lower than conventional heating. The flat-sheet porous microfiltration membrane MFFK-1 was used as a support, and the crosslinked PTMSP/PEI loaded with a porous filler was applied as a selective layer (0.8&ndash 1.8 µ m thick) to the TFC membranes. The initial IR-PAN-a sample was additionally milled to obtain a milled IR-PAN-aM sample with a monomodal particle size distribution of 500&ndash 800 nm. It was shown that IR-PAN-a, as a filler material with a high surface area and pore volume (2450 m2/g and 1.06 cm3/g, respectively) and a well-developed sponge-like structure, leads to the increase of the N2, O2, and CO2 permeance of PTMSP-based hybrid membrane material and the decrease of the aging of PTMSP. The simultaneous effect of crosslinking and the addition of a highly porous filler essentially improved the aging behavior of PTMSP-based TFC membranes. The monomodal and narrow particle size distribution of highly porous activated IR-pyrolyzed PAN is a key factor for the production of TFC membranes with reduced aging. The highest stability was achieved by the addition of a milled IR-PAN-aM sample (10 wt%). TFC membrane permeance was 6300 GPU (30% of initial permeance) after 11,000 h of aging at ambient laboratory conditions. |
| Databáze: | OpenAIRE |
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