scholarly journals Preparation of Amino-Functional UiO-66/PIMs Mixed Matrix Membranes with [bmim][Tf2N] as Regulator for Enhanced Gas Separation

Membranes ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 35
Author(s):  
Jiangfeng Lu ◽  
Xu Zhang ◽  
Lusheng Xu ◽  
Guoliang Zhang ◽  
Jiuhan Zheng ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Gas Separation ◽  
Interfacial Interaction ◽  
Organic Polymer ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
High Quality ◽  
High Co2 ◽  
Separation Behavior ◽  
Matrix Membranes

Development of mixed matrix membranes (MMMs) with excellent permeance and selectivity applied for gas separation has been the focus of world attention. However, preparation of high-quality MMMs still remains a big challenge due to the lack of enough interfacial interaction. Herein, ionic liquid (IL)-modified UiO-66-NH2 filler was first incorporated into microporous organic polymer material (PIM-1) to prepare dense and defect-free mixed matrix membranes via a coating modification and priming technique. IL [bmim][Tf2N] not only improves the hydrophobicity of UiO-66-NH2 and facilitates better dispersion of UiO-66-NH2 nanoparticles into PIM-1 matrix, but also promotes the affinity between MOFs and polymer, sharply reducing interface non-selective defects of MMMs. By using this strategy, we can not only facilely synthesize high-quality MMMs ignoring non-selective interfacial voids, but also structurally regulate MOF nanoparticles in the polymer substrate and greatly improve interface compatibility and stability of MMMs. The method also gives suitable level of generality for fabrication of versatile defect-free MMMs based on different combination of MOFs and PIMs. The prepared UiO-66-NH2@IL/PIM-1 membrane exhibited outstanding gas separation behavior with large CO2 permeation of 8283.4 Barrer and high CO2/N2 selectivity of 22.5.

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).

Separation behavior of amorphous amino-modified silica nanoparticle/polyimide mixed matrix membranes for gas separation

2020 ◽  
Vol 595 ◽  
pp. 117542 ◽  
Author(s):  
Chien-Chieh Hu ◽  
Po-Hsiu Cheng ◽  
Shang-Chih Chou ◽  
Cheng-Lee Lai ◽  
Shu-Hsien Huang ◽  
...  
Keyword(s):  
Gas Separation ◽  
Silica Nanoparticle ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
Modified Silica ◽  
Separation Behavior ◽  
Matrix Membranes

scholarly journals Optimization of a MOF Blended with Modified Polyimide Membrane for High-Performance Gas Separation

Membranes ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 34
Author(s):  
Yushu Zhang ◽  
Hongge Jia ◽  
Qingji Wang ◽  
Wenqiang Ma ◽  
Guoxing Yang ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Gas Separation ◽  
High Performance ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
Polyimide Membrane ◽  
Amine Functionalized ◽  
Ideal Selectivity ◽  
Metal Organic ◽  
Matrix Membranes

The preparation, characterization and gas separation properties of mixed matrix membranes (MMMs) were obtained from polyimide capped with ionic liquid and blended with metal-organic frameworks (MOFs). The synthesized MOF was amine functionalized to produce UiO-66-NH2, and its amino group has a higher affinity for CO2. Mixed matrix membranes exhibited good membrane forming ability, heat resistance and mechanical properties. The polyimide membrane exclusively capped by ionic liquid exhibited good permselectivity of 74.1 for CO2/CH4, which was 6.2 times that of the pure polyimide membrane. It is worth noting that MMM blended with UiO-66-NH2 demonstrated the highest ideal selectivity for CO2/CH4 (95.1) with a CO2 permeability of 7.61 Barrer, which is close to the 2008 Robeson upper bound. The addition of UiO-66-NH2 and ionic liquid enhanced the permselectivity of MMMs, which may be one of the promising technologies for high performance CO2/CH4 gas separation.

MOF Nanosheet-Based Mixed Matrix Membranes with Metal–Organic Coordination Interfacial Interaction for Gas Separation

2020 ◽  
Vol 12 (43) ◽  
pp. 49101-49110 ◽  
Author(s):  
Xiangyu Bi ◽  
Yong’an Zhang ◽  
Feng Zhang ◽  
Shenxiang Zhang ◽  
Zhenggong Wang ◽  
...  
Keyword(s):  
Gas Separation ◽  
Interfacial Interaction ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
Metal Organic ◽  
Matrix Membranes

scholarly journals Gas Separation by Mixed Matrix Membranes with Porous Organic Polymer Inclusions within o-Hydroxypolyamides Containing m-Terphenyl Moieties

Polymers ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 931
Author(s):  
Cenit Soto ◽  
Edwin S. Torres-Cuevas ◽  
Alfonso González-Ortega ◽  
Laura Palacio ◽  
Ángel E. Lozano ◽  
...  
Keyword(s):  
Free Volume ◽  
Gas Separation ◽  
Polymer Networks ◽  
Quadratic Function ◽  
Porous Polymer ◽  
Organic Polymer ◽  
Mixed Matrix Membranes ◽  
Exponential Dependence ◽  
Mixed Matrix ◽  
Matrix Membranes

A hydroxypolyamide (HPA) manufactured from 2,2-bis(3-amino-4-hydroxy phenyl)-hexafluoropropane (APAF) diamine and 5′-terbutyl-m-terphenyl-4,4′′-dicarboxylic acid chloride (tBTpCl), and a copolyimide produced by stochiometric copolymerization of APAF and 4,4′-(hexafluoroisopropylidene) diamine (6FpDA), using the same diacid chloride, were obtained and used as polymeric matrixes in mixed matrix membranes (MMMs) loaded with 20% (w/w) of two porous polymer networks (triptycene-isatin, PPN-1, and triptycene-trifluoroacetophenone, PPN-2). These MMMs, and also the thermally rearranged membranes (TR-MMMs) that underwent a thermal treatment process to convert the o-hydroxypolyamide moieties to polybenzoxazole ones, were characterized, and their gas separation properties evaluated for H2, N2, O2, CH4, and CO2. Both TR process and the addition of PPN increased permeability with minor decreases in selectivity for all gases tested. Excellent results were obtained, in terms of the permeability versus selectivity compromise, for H2/CH4 and H2/N2 separations with membranes approaching the 2008 Robeson’s trade-off line. The best gas separation properties were obtained when PPN-2 was used. Finally, gas permeation was characterized in terms of chain intersegmental distance and fraction of free volume of the membrane along with the kinetic diameters of the permeated gases. The intersegmental distance increased after TR and/or the addition of PPN-2. Permeability followed an exponential dependence with free volume and a quadratic function of the kinetic diameter of the gas.

Effect of new metal–organic framework (zeolitic imidazolate framework [ZIF-12]) in mixed matrix membranes on structure, morphology, and gas separation properties

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Mehtap Safak Boroglu ◽  
Ismail Boz ◽  
Busra Kaya
Keyword(s):  
Gas Separation ◽  
Gas Permeability ◽  
Metal Organic Framework ◽  
Thermomechanical Analysis ◽  
Variable Pressure ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
Sem Images ◽  
Zeolitic Imidazolate Framework ◽  
Matrix Membranes

Abstract In our study, the synthesis of zeolitic imidazolate framework (ZIF-12) crystals and the preparation of mixed matrix membranes (MMMs) with various ZIF-12 loadings were targeted. The characterization of ZIF-12 and MMMs were carried out by Fourier transform infrared spectroscopy analysis, thermogravimetric analysis, scanning electron microscopy (SEM), and thermomechanical analysis. The performance of MMMs was measured by the ability of binary gas separation. Commercial polyetherimide (PEI-Ultem® 1000) polymer was used as the polymer matrix. The solution casting method was utilized to obtain dense MMMs. In the SEM images of ZIF-12 particles, the particles with a rhombic dodecahedron structure were identified. From SEM images, it was observed that the distribution of ZIF-12 particles in the MMMs was homogeneous and no agglomeration was present. Gas permeability experiments of MMMs were measured for H2, CO2, and CH4 gases at steady state, at 4 bar and 35 °C by constant volume-variable pressure method. PEI/ZIF-12-30 wt% MMM exhibited high permeability and ideal selectivity values for H2/CH4 and CO2/CH4 were P H 2 / CH 4 = 331.41 ${P}_{{\text{H}}_{2}/{\text{CH}}_{4}}=331.41$ and P CO 2 / CH 4 = 53.75 ${P}_{{\text{CO}}_{2}/{\text{CH}}_{4}}=53.75$ gas pair.

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