Highly permeable thermally rearranged polymer composite membranes with a graphene oxide scaffold for gas separation

2018 ◽  
Vol 6 (17) ◽  
pp. 7668-7674 ◽  
Author(s):  
Seungju Kim ◽  
Jue Hou ◽  
Yuqi Wang ◽  
Ranwen Ou ◽  
George P. Simon ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Gas Separation ◽  
Polymer Composite ◽  
Energy Efficient ◽  
Composite Membranes ◽  
Selective Layer

A 2D scaffold of graphene oxide is formed inside a polymer to assist the fabrication of a defect-free and ultrathin (<40 nm) selective layer of thermally rearranged polybenzoxazole-co-imide membrane for energy-efficient CO2 separation.

scholarly journals Chemically Cross-Linked Graphene Oxide as a Selective Layer on Electrospun Polyvinyl Alcohol Nanofiber Membrane for Nanofiltration Application

Nanomaterials ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 2867
Author(s):  
Myoung Jun Park ◽  
Grace M. Nisola ◽  
Dong Han Seo ◽  
Chen Wang ◽  
Sherub Phuntsho ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Polyvinyl Alcohol ◽  
Self Assembly ◽  
Water Flux ◽  
Composite Membranes ◽  
Cross Linking ◽  
Support Surface ◽  
Eosin Y ◽  
Selective Layer ◽  
Assembly Technique

Graphene oxide (GO) nanosheets were utilized as a selective layer on a highly porous polyvinyl alcohol (PVA) nanofiber support via a pressure-assisted self-assembly technique to synthesize composite nanofiltration membranes. The GO layer was rendered stable by cross-linking the nanosheets (GO-to-GO) and by linking them onto the support surface (GO-to-PVA) using glutaraldehyde (GA). The amounts of GO and GA deposited on the PVA substrate were varied to determine the optimum nanofiltration membrane both in terms of water flux and salt rejection performances. The successful GA cross-linking of GO interlayers and GO-PVA via acetalization was confirmed by FTIR and XPS analyses, which corroborated with other characterization results from contact angle and zeta potential measurements. Morphologies of the most effective membrane (CGOPVA-50) featured a defect-free GA cross-linked GO layer with a thickness of ~67 nm. The best solute rejections of the CGOPVA-50 membrane were 91.01% for Na2SO4 (20 mM), 98.12% for Eosin Y (10 mg/L), 76.92% for Methylene blue (10 mg/L), and 49.62% for NaCl (20 mM). These findings may provide one of the promising approaches in synthesizing mechanically stable GO-based thin-film composite membranes that are effective for solute separation via nanofiltration.

PRELIMINARY INVESTIGATION ON GAS SEPARATION ABILITY OF POLYSULFONE/PEBAX 1657 COMPOSITE MEMBRANE

2016 ◽  
Vol 78 (11) ◽  
Author(s):  
M. S. Abdul Wahab ◽  
A. R. Sunarti ◽  
D. Nurul Farhana
Keyword(s):  
Gas Separation ◽  
Human Activities ◽  
Preliminary Investigation ◽  
Composite Membranes ◽  
Coated Sample ◽  
Separation And Purification ◽  
Slight Improvement ◽  
Cross Sectional ◽  
Co2 Gas ◽  
Selective Layer

Human activities related to coal, petroleum, natural gases and few other energy sources emit carbon dioxide (CO2) gas to environment and increase global warming. The emission of CO2 gas from human activities cannot be avoided as they are the main sources of energy. The separation and purification of these gases before they are freely escaped to the atmosphere could be a turning point for a better future. Membranes are one of the methods widely used for gas separation as they are simple mechanism and costly cheap. In this study, Polysulfone (PSf) was introduced as composite membranes with Polyether block amide (Pebax 1657) as a dense selective layer for CO2/N2 separation. For the dope preparation, 18% of PSf with 2% Polyethylene glycol (PEG) as an additive was diluted in 80% N-methyl-2-pyrrolidone (NMP) meanwhile, the Pebax 1657 coating solution has been prepared by using 4% Pebax 1657 with 6% lithium chloride (LiCl) as an additive in 70/30 water/ethanol solution. Cross sectional view of the film showed a wide and long cavity with finger-like structure from 6 µm to 10 µm wide with Pebax 1657 selective layer thickness of 29.3 µm. FTIR analysis has proved that all elements present in the film belong to the Pebax 1657, PSf, PEG and LiCl. The permeance test shows a very slight improvement of uncoated and coated samples where uncoated PSf selectivity was found to be 1.17 while the coated sample was 1.23. Even though the permeance result quite low and almost no separation occurs but the slight improvement of uncoated and coated PSf is noticeable and have the potential for future improvement.

Effect of Casting Solution Composition on Properties of PIM-1/PAN Thin Film Composite Membranes

2019 ◽  
Vol 816 ◽  
pp. 167-173 ◽  
Author(s):  
Maya N. Putintseva ◽  
Ilya L. Borisov ◽  
Alexey A. Yushkin ◽  
R.A. Kirk ◽  
P.M. Budd ◽  
...  
Keyword(s):  
Thin Film ◽  
Gas Separation ◽  
Composite Membranes ◽  
Solution Composition ◽  
Selective Layer ◽  
Film Composite ◽  
Uniform Layer ◽  
Thin Film Composite ◽  
Casting Solution

In this work, PIM-1 thin film composite membranes supported on PAN were developed. The influence of PIM-1 concentration and nature of solvent stabilizer on the structure and gas separation properties of TFC membranes were studied. It was shown that amylene stabilized chloroform as PIM-1 solvent allows membranes to be obtained with a uniform selective layer in the whole range of concentrations used, and the ethanol stabilized chloroform provides a uniform layer at 2 and 4 wt % PIM-1 concentration. The best CO2/N2 selectivities were 35,9 and 39,5 for 4 % wt PIM-1 solution in ethanol and amylene stabilized chloroform, respectively.

Cyclodextrin-based supramolecular polymeric nanoparticles for next generation gas separation membranes

2015 ◽  
Vol 3 (28) ◽  
pp. 14876-14886 ◽  
Author(s):  
Shereen Tan ◽  
Qiang Fu ◽  
Joel. M. P. Scofield ◽  
Jinguk Kim ◽  
Paul A. Gurr ◽  
...  
Keyword(s):  
Gas Separation ◽  
Gas Transport ◽  
Polymeric Nanoparticles ◽  
Composite Membranes ◽  
Dynamic Nature ◽  
Selective Layer ◽  
Separation Membranes ◽  
Gas Separation Membranes ◽  
First Time ◽  
Nanoparticle Additives

Cyclodextrin-based supramolecular polyrotaxanes are for the first time used as soft nanoparticle additives for the selective layer of composite membranes. They exhibit outstanding gas transport characteristics at low additive percentages, due to the dynamic nature of the PDMS side chains.

Challenges and recent advances in MOF–polymer composite membranes for gas separation

2016 ◽  
Vol 3 (7) ◽  
pp. 896-909 ◽  
Author(s):  
Yuanyuan Zhang ◽  
Xiao Feng ◽  
Shuai Yuan ◽  
Junwen Zhou ◽  
Bo Wang
Keyword(s):  
Gas Separation ◽  
Polymer Composite ◽  
Recent Progress ◽  
Polymer Membranes ◽  
Composite Membranes ◽  
Recent Advances

This review summarizes the recent progress in the fabrication of MOF-polymer membranes including the challenges, difficulties and corresponding solutions.

scholarly journals Synthesis, Transfer, and Gas Separation Characteristics of MOF-Templated Polymer Membranes

Membranes ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 124 ◽  
Author(s):  
Sophia Schmitt ◽  
Sergey Shishatskiy ◽  
Peter Krolla ◽  
Qi An ◽  
Salma Begum ◽  
...  
Keyword(s):  
Gas Separation ◽  
Metal Organic Framework ◽  
Polymer Networks ◽  
Composite Membranes ◽  
Polymer Materials ◽  
Polymeric Membrane ◽  
Membrane Thickness ◽  
Selective Layer ◽  
Metal Organic ◽  
Organic Framework

This paper discusses the potential of polymer networks, templated by crystalline metal–organic framework (MOF), as novel selective layer material in thin film composite membranes. The ability to create mechanically stable membranes with an ultra-thin selective layer of advanced polymer materials is highly desirable in membrane technology. Here, we describe a novel polymeric membrane, which is synthesized via the conversion of a surface anchored metal–organic framework (SURMOF) into a surface anchored gel (SURGEL). The SURGEL membranes combine the high variability in the building blocks and the possibility to control the network topology and membrane thickness of the SURMOF synthesis with high mechanical and chemical stability of polymers. Next to the material design, the transfer of membranes to suitable supports is also usually a challenging task, due to the fragile nature of the ultra-thin films. To overcome this issue, we utilized a porous support on top of the membrane, which is mechanically stable enough to allow for the easy membrane transfer from the synthesis substrate to the final membrane support. To demonstrate the potential for gas separation of the synthesized SURGEL membranes, as well as the suitability of the transfer method, we determined the permeance for eight gases with different kinetic diameters.

Synthesis of novel Co(ii) complexed bipyrimidine polyimide and preparation of thin film composite membranes

2020 ◽  
Vol 11 (31) ◽  
pp. 5057-5066
Author(s):  
Jianrui Zhang ◽  
Xiaocui Han ◽  
Cheng Yue ◽  
Di Liu ◽  
Ziyu Lin ◽  
...  
Keyword(s):  
Thin Film ◽  
Gas Separation ◽  
Systematic Study ◽  
Composite Membranes ◽  
Selective Layer ◽  
Film Composite ◽  
Thin Film Composite

A systematic study was carried out on the effect of the polyimide complexed with Co2+ as the selective layer of thin film composite membranes on gas separation.

COMPOSITE MEMBRANES WITH CROSS-LINKED MATRIMID SELECTIVE LAYER FOR GAS SEPARATION

2008 ◽  
Vol 7 (6) ◽  
pp. 653-659 ◽  
Author(s):  
Marcel Popa ◽  
Carmen Nistor ◽  
Sergey Shishatskiy ◽  
Suzana Pereira Nunes
Keyword(s):  
Gas Separation ◽  
Composite Membranes ◽  
Selective Layer
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