Improving Gas Separation Performance of Poly(vinylidene fluoride) Based Mixed Matrix Membranes Containing Metal–Organic Frameworks by Chemical Modification

2015 ◽  
Vol 54 (48) ◽  
pp. 12124-12134 ◽  
Author(s):  
Elahe Ahmadi Feijani ◽  
Ahmad Tavasoli ◽  
Hossein Mahdavi
Keyword(s):  
Chemical Modification ◽  
Gas Separation ◽  
Vinylidene Fluoride ◽  
Metal Organic Frameworks ◽  
Mixed Matrix Membranes ◽  
Separation Performance ◽  
Mixed Matrix ◽  
Poly Vinylidene Fluoride ◽  
Metal Organic ◽  
Gas Separation Performance

Synthesis and gas permselectivity of CuBTC–GO–PVDF mixed matrix membranes

2018 ◽  
Vol 42 (14) ◽  
pp. 12013-12023 ◽  
Author(s):  
Elahe Ahmadi Feijani ◽  
Hossein Mahdavi ◽  
Ahmad Tavassoli
Keyword(s):  
Graphene Oxide ◽  
Gas Separation ◽  
Metal Organic Framework ◽  
Mixed Matrix Membranes ◽  
Separation Performance ◽  
Mixed Matrix ◽  
Metal Organic ◽  
Gas Separation Performance ◽  
Organic Framework ◽  
Matrix Membranes

A CuBTC (copper(ii) benzene-1,3,5-tricarboxylate) metal organic framework (MOF) and graphene oxide (GO) nanosheets were introduced into a semi-crystalline PVDF to produce mixed matrix membranes (MMMs) to promote gas separation performance.

scholarly journals Carbon Dioxide Enrichment PEBAX/MOF Composite Membrane for CO2 Separation

Membranes ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 404
Author(s):  
Po-Hsiang Tang ◽  
Pamela Berilyn So ◽  
Wa-Hua Li ◽  
Zi-You Hui ◽  
Chien-Chieh Hu ◽  
...  
Keyword(s):  
Gas Separation ◽  
Performance Test ◽  
Mixed Matrix Membranes ◽  
Separation Performance ◽  
Mixed Matrix ◽  
Metal Organic ◽  
Unit Performance ◽  
Economic Considerations ◽  
Gas Separation Performance ◽  
Matrix Membranes

Zeolitic imidazole framework (ZIF-8) was incorporated into poly(ether-block-amide) (Pebax-1657) in differing ratios to prepare mixed matrix membranes (MMMs) for gas separation. As ZIF-8 loading is increased, gas separation selectivity also gradually increases. For economic considerations, the proportion of the increase in selectivity to the amount of MOF loaded per unit was calculated. The results show that mixing 5% MOF gives the best unit performance. With this, a variety of MOFs (UiO-66, UiO-66-NH2, A520, MIL-68(Al) and MIL-100(Fe)) were mixed with PEBAX at 5 loading to prepare MMMs. In this work, metal-organic frameworks (MOFs) were processed using the dry-free method, where in the synthesized MOF was not dried prior to incorporation. The gas separation performance test carried out shows the highest separation performance was exhibited by P-UiO-66, wherein the CO2/N2 gas selectivity was 85.94, and the permeability was 189.77 (Barrer), which was higher than Robeson’s Upper bound in 2008, and obtained a high permeability and selectivity among mixed matrix membranes. In the preparation of high quality MMMs for gas separation, details regarding the interface phenomenon were assessed.

scholarly journals High Performance Gas Separation Mixed Matrix Membrane Fabricated by Incorporation of Functionalized Submicrometer-Sized Metal-Organic Framework

Materials ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 1421 ◽  
Author(s):  
Baosheng Ge ◽  
Yanyan Xu ◽  
Haoru Zhao ◽  
Haixiang Sun ◽  
Yaoli Guo ◽  
...  
Keyword(s):  
Gas Separation ◽  
High Performance ◽  
Gas Adsorption ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix Membrane ◽  
Separation Performance ◽  
Mixed Matrix ◽  
Sem Image ◽  
Metal Organic ◽  
Gas Separation Performance

Mixed matrix membranes (MMMs) attract great attention due to their outstanding gas separation performance. The compatibility between the fillers and the polymer matrix is one of the key points for the preparation of high-performance MMMs. In this work, MMMs consisting of metal-organic frameworks (MOFs) of amine-modified Cu-BTC (NH2-Cu-BTC; BTC = 1,3,5-benzenetricarboxylic acid) and submicrometer-sized amine-modified Cu-BTC (sub-NH2-Cu-BTC) incorporated into a Pebax-1657 polymer were fabricated for the gas separation. The SEM image and Fourier transform infrared spectroscopy (FTIR) spectra showed an increase in the surface roughness of MOFs and the presence of amino groups on the surface of Cu-BTC after the amination modification, and a decrease in the size of MOFs crystals after the submicrometer-sized aminated modification. Gas adsorption analysis indicated that NH2-Cu-BTC and sub-NH2-Cu-BTC had a higher gas adsorption capacity for CO2 compared to the unmodified Cu-BTC. The scanning electron microscopy (SEM) image showed that NH2-Cu-BTC and sub-NH2-Cu-BTC, especially sub-NH2-Cu-BTC, had a better compatibility with a polyether-block-amide (Pebax) matrix in the MMMs. The gas separation performance indicated that the Pebax/sub-NH2-Cu-BTC MMMs evidently improved the CO2/N2 and CO2/CH4 selectivity at the expense of a slight CO2 permeability. The results reveal that modified MOF-filled MMMs possess great potential for applications in the CO2 separation field.

Polymer functionalization to enhance interface quality of mixed matrix membranes for high CO2/CH4 gas separation

2015 ◽  
Vol 3 (29) ◽  
pp. 15202-15213 ◽  
Author(s):  
Nguyen Tien-Binh ◽  
Hoang Vinh-Thang ◽  
Xiao Yuan Chen ◽  
Denis Rodrigue ◽  
Serge Kaliaguine
Keyword(s):  
Gas Separation ◽  
Metal Organic Frameworks ◽  
Molar Ratio ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
Interface Quality ◽  
High Co2 ◽  
Metal Organic ◽  
Matrix Membranes

Hydroxyl-functionalized homo- and co-polyimides 6FDA–(DAM)x–(HAB)y (with x : y molar ratio of 1 : 0; 2 : 1; 1 : 1; 1 : 2) and two metal–organic frameworks (MOFs), MIL-53(Al) and NH2-MIL-53(Al) were synthesized for preparation of mixed matrix membranes (MMMs).

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