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.

scholarly journals Correction to “New Materials for Gas Separation Applications: Mixed Matrix Membranes Made from Linear Polyimides and Porous Polymer Networks Having Lactam Groups”

2019 ◽  
Vol 58 (43) ◽  
pp. 20179-20179
Author(s):  
Carla Aguilar-Lugo ◽  
Fabián Suárez-García ◽  
Antonio Hernández ◽  
Jesús A. Miguel ◽  
Ángel E. Lozano ◽  
...  
Keyword(s):  
Gas Separation ◽  
Polymer Networks ◽  
Porous Polymer ◽  
Mixed Matrix Membranes ◽  
New Materials ◽  
Mixed Matrix ◽  
Matrix Membranes

New Materials for Gas Separation Applications: Mixed Matrix Membranes Made from Linear Polyimides and Porous Polymer Networks Having Lactam Groups

2019 ◽  
Vol 58 (22) ◽  
pp. 9585-9595 ◽  
Author(s):  
Carla Aguilar-Lugo ◽  
Fabián Suárez-García ◽  
Antonio Hernández ◽  
Jesús A. Miguel ◽  
Ángel E. Lozano ◽  
...  
Keyword(s):  
Gas Separation ◽  
Polymer Networks ◽  
Porous Polymer ◽  
Mixed Matrix Membranes ◽  
New Materials ◽  
Mixed Matrix ◽  
Matrix Membranes

scholarly journals Highly Permeable Mixed Matrix Membranes of Thermally Rearranged Polymers and Porous Polymer Networks for Gas Separations

2021 ◽  
Author(s):  
Carla Aguilar-Lugo ◽  
Won Hee Lee ◽  
Jesús A. Miguel ◽  
José G. de la Campa ◽  
Pedro Prádanos ◽  
...  
Keyword(s):  
Polymer Networks ◽  
Porous Polymer ◽  
Gas Separations ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
Matrix Membranes

scholarly journals “All Polyimide” Mixed Matrix Membranes for High Performance Gas Separation

Polymers ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1329
Author(s):  
Maijun Li ◽  
Zhibo Zheng ◽  
Zhiguang Zhang ◽  
Nanwen Li ◽  
Siwei Liu ◽  
...  
Keyword(s):  
Free Volume ◽  
Gas Separation ◽  
Network Architecture ◽  
Mixed Matrix Membranes ◽  
High Porosity ◽  
Mixed Matrix ◽  
Fractional Free Volume ◽  
Interfacial Compatibility ◽  
Polyimide Matrix ◽  
Matrix Membranes

To improve the interfacial compatibility of mixed matrix membranes (MMMs) for gas separation, microporous polyimide particle (AP) was designed, synthesized, and introduced into intrinsic microporous polyimide matrix (6FDA-Durene) to form “all polyimide” MMMs. The AP fillers showed the feature of thermal stability, similar density with polyimide matrix, high porosity, high fractional free volume, large microporous dimension, and interpenetrating network architecture. As expected, the excellent interfacial compatibility between 6FDA-Durene and AP without obvious agglomeration even at a high AP loading of 10 wt.% was observed. As a result, the CO2 permeability coefficient of MMM with AP loading as low as 5 wt.% reaches up to 1291.13 Barrer, which is 2.58 times that of the pristine 6FDA-Durene membrane without the significant sacrificing of ideal selectivity of CO2/CH4. The improvement of permeability properties is much better than that of the previously reported MMMs, where high filler content is required to achieve a high permeability increase but usually leads to significant agglomeration or phase separation of fillers. It is believed that the excellent interfacial compatibility between the PI fillers and the PI matrix induce the effective utilization of porosity and free volume of AP fillers during gas transport. Thus, a higher diffusion coefficient of MMMs has been observed than that of the pristine PI membrane. Furthermore, the rigid polyimide fillers also result in the excellent anti-plasticization ability for CO2. The MMMs with a 10 wt.% AP loading shows a CO2 plasticization pressure of 300 psi.

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.

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.

Investigation of cellulose acetate/gamma‐cyclodextrin MOF based mixed matrix membranes for CO 2 /CH 4 gas separation

2021 ◽  
Vol 11 (2) ◽  
pp. 313-330
Author(s):  
Ovaid Mehmood ◽  
Sarah Farrukh ◽  
Arshad Hussain ◽  
Mohammad Younas ◽  
Zarrar Salahuddin ◽  
...  
Keyword(s):  
Cellulose Acetate ◽  
Gas Separation ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
Gamma Cyclodextrin ◽  
Matrix Membranes

Fabrication of Homogenous Polymer-Zeolite Nanocomposites as Mixed-Matrix Membranes for Gas Separation

2012 ◽  
Vol 35 (5) ◽  
pp. 885-892 ◽  
Author(s):  
H. Karkhanechi ◽  
H. Kazemian ◽  
H. Nazockdast ◽  
M. R. Mozdianfard ◽  
S. M. Bidoki
Keyword(s):  
Gas Separation ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
Matrix Membranes
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