scholarly journals Beyond the H2/CO2 upper bound: one-step crystallization and separation of nano-sized ZIF-11 by centrifugation and its application in mixed matrix membranes

2015 ◽  
Vol 3 (12) ◽  
pp. 6549-6556 ◽  
Author(s):  
Javier Sánchez-Laínez ◽  
Beatriz Zornoza ◽  
Álvaro Mayoral ◽  
Ángel Berenguer-Murcia ◽  
Diego Cazorla-Amorós ◽  
...  
Keyword(s):  
Upper Bound ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
One Step ◽  
Step Crystallization ◽  
Matrix Membranes

Nano-sized ZIF-11 with similar features to ZIF-11 has been used for the adsorption of H2 and CO2 and in the preparation of mixed matrix membranes for H2/CO2 separation.

scholarly journals REMOVED: Novel Concept for Artificial Kidney: Mixed Matrix Membranes Combining Diffusion and Adsorption in One Step

2012 ◽  
Vol 44 ◽  
pp. 451-453 ◽  
Author(s):  
M. Tijink ◽  
M. Wester ◽  
J. Sun ◽  
A. Saris ◽  
S. Saiful ◽  
...  
Keyword(s):  
Artificial Kidney ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
One Step ◽  
Novel Concept ◽  
Matrix Membranes

The polymeric upper bound for N 2 /NF 3 separation and beyond; ZIF-8 containing mixed matrix membranes

2015 ◽  
Vol 486 ◽  
pp. 29-39 ◽  
Author(s):  
Sunghwan Park ◽  
Woo Ram Kang ◽  
Hyuk Taek Kwon ◽  
Soobin Kim ◽  
Myungeun Seo ◽  
...  
Keyword(s):  
Upper Bound ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
Matrix Membranes

A novel approach for blood purification: Mixed-matrix membranes combining diffusion and adsorption in one step

2012 ◽  
Vol 8 (6) ◽  
pp. 2279-2287 ◽  
Author(s):  
Marlon S.L. Tijink ◽  
Maarten Wester ◽  
Junfen Sun ◽  
Anno Saris ◽  
Lydia A.M. Bolhuis-Versteeg ◽  
...  
Keyword(s):  
Blood Purification ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
Novel Approach ◽  
One Step ◽  
Matrix Membranes

scholarly journals Computational Screening of MOF-Based Mixed Matrix Membranes for CO2/N2Separations

2016 ◽  
Vol 2016 ◽  
pp. 1-12 ◽  
Author(s):  
Zeynep Sumer ◽  
Seda Keskin
Keyword(s):  
Upper Bound ◽  
Gas Permeability ◽  
Metal Organic Framework ◽  
Polymer Membranes ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
Separation Potential ◽  
Computational Screening ◽  
Metal Organic ◽  
Matrix Membranes

Atomically detailed simulations were used to examine CO2/N2separation potential of metal organic framework- (MOF-) based mixed matrix membranes (MMMs) in this study. Gas permeability and selectivity of 700 new MMMs composed of 70 different MOFs and 10 different polymers were calculated for CO2/N2separation. This is the largest number of MOF-based MMMs for which computational screening is done to date. Selecting the appropriate MOFs as filler particles in polymers resulted in MMMs that have higher CO2/N2selectivities and higher CO2permeabilities compared to pure polymer membranes. We showed that, for polymers that have low CO2permeabilities but high CO2selectivities, the identity of the MOF used as filler is not important. All MOFs enhanced the CO2permeabilities of this type of polymers without changing their selectivities. Several MOF-based MMMs were identified to exceed the upper bound established for polymers. The methods we introduced in this study will create many opportunities to select the MOF/polymer combinations with useful properties for CO2separation applications.

scholarly journals Hydrogen Recovery by Mixed Matrix Membranes Made from 6FCl-APAF HPA with Different Contents of a Porous Polymer Network and Their Thermal Rearrangement

Polymers ◽  
2021 ◽  
Vol 13 (24) ◽  
pp. 4343
Author(s):  
Cenit Soto ◽  
Edwin S. Torres-Cuevas ◽  
Alfonso González-Ortega ◽  
Laura Palacio ◽  
Pedro Prádanos ◽  
...  
Keyword(s):  
Upper Bound ◽  
High Selectivity ◽  
Hydrogen Permeability ◽  
Polymer Network ◽  
Porous Polymer ◽  
Mixed Matrix Membranes ◽  
Thermal Rearrangement ◽  
Mixed Matrix ◽  
High Hydrogen ◽  
Matrix Membranes

Mixed matrix membranes (MMMs) consisting of a blend of a hydroxypolyamide (HPA) matrix and variable loads of a porous polymer network (PPN) were thermally treated to induce the transformation of HPA to polybenzoxazole (β-TR-PBO). Here, the HPA matrix was a hydroxypolyamide having two hexafluoropropyilidene moieties, 6FCl-APAF, while the PPN was prepared by reacting triptycene (TRP) and trifluoroacetophenone (TFAP) in a superacid solution. The most probable size of the PPN particles was 75 nm with quite large distributions. The resulting membranes were analyzed by SEM and AFM. Up to 30% PPN loads, both SEM and AFM images confirmed quite planar surfaces, at low scale, with limited roughness. Membranes with high hydrogen permeability and good selectivity for the gas pairs H2/CH4 and H2/N2 were obtained. For H2/CO2, selectivity almost vanished after thermal rearrangement. In all cases, their hydrogen permeability increased with increasing loads of PPN until around 30% PPN with ulterior fairly abrupt decreasing of permeability for all gases studied. Thermal rearrangement of the MMMs resulted in higher permeabilities but lower selectivities. For all the membranes and gas pairs studied, the balance of permeability vs. selectivity surpassed the 1991 Robeson’s upper bound, and approached or even exceeded the 2008 line, for MMMs having 30% PPN loads. In all cases, the HPA-MMMs before thermal rearrangement provided good selectivity versus permeability compromise, similar to their thermally rearranged counterparts but in the zone of high selectivity. For H2/CH4, H2/N2, these nonthermally rearranged MMMs approach the 2008 Robeson’s upper bound while H2/CO2 gives selective transport favoring H2 on the 1991 Robeson’s bound. Thus, attending to the energy cost of thermal rearrangement, it could be avoided in some cases especially when high selectivity is the target rather than high permeability.

A drying-free and one-step process for the preparation of siloxane/CS mixed-matrix membranes with outstanding ethanol dehydration performances

2019 ◽  
Vol 221 ◽  
pp. 325-330 ◽  
Author(s):  
Yi-Feng Lin ◽  
Jin-Chieh Ho ◽  
Kun-Yi Andrew Lin ◽  
Kuo-Lun Tung ◽  
Tsair-Wang Chung ◽  
...  
Keyword(s):  
Mixed Matrix Membranes ◽  
Ethanol Dehydration ◽  
Mixed Matrix ◽  
Step Process ◽  
One Step ◽  
Matrix Membranes

Long-Term Stable Metal Organic Framework (MOF) Based Mixed Matrix Membranes for Ultrafiltration

2020 ◽  
Author(s):  
Muayad Al-shaeli ◽  
Stefan J. D. Smith ◽  
Shanxue Jiang ◽  
Huanting Wang ◽  
Kaisong Zhang ◽  
...  
Keyword(s):  
Contact Angle ◽  
Water Contact Angle ◽  
Mixed Matrix Membranes ◽  
Recovery Ratio ◽  
Mixed Matrix ◽  
Water Contact ◽  
Membrane Performance ◽  
Metal Organic ◽  
Matrix Membranes

<p>In this study, novel <a>mixed matrix polyethersulfone (PES) membranes</a> were synthesized by using two different kinds of metal organic frameworks (MOFs), namely UiO-66 and UiO-66-NH<sub>2</sub>. The composite membranes were characterised by SEM, EDX, FTIR, PXRD, water contact angle, porosity, pore size, etc. Membrane performance was investigated by water permeation flux, flux recovery ratio, fouling resistance and anti-fouling performance. The stability test was also conducted for the prepared mixed matrix membranes. A higher reduction in the water contact angle was observed after adding both MOFs to the PES and sulfonated PES membranes compared to pristine PES membranes. An enhancement in membrane performance was observed by embedding the MOF into PES membrane matrix, which may be attributed to the super-hydrophilic porous structure of UiO-66-NH<sub>2</sub> nanoparticles and hydrophilic structure of UiO-66 nanoparticles that could accelerate the exchange rate between solvent and non-solvent during the phase inversion process. By adding the MOFs into PES matrix, the flux recovery ratio was increased greatly (more than 99% for most mixed matrix membranes). The mixed matrix membranes showed higher resistance to protein adsorption compared to pristine PES membranes. After immersing the membranes in water for 3 months, 6 months and 12 months, both MOFs were stable and retained their structure. This study indicates that UiO-66 and UiO-66-NH<sub>2</sub> are great candidates for designing long-term stable mixed matrix membranes with higher anti-fouling performance.</p>

Porous covalent triazine piperazine polymer (CTPP)/PEBAX mixed matrix membranes for CO2/N2 and CO2/CH4 separations

2019 ◽  
Vol 591 ◽  
pp. 117348 ◽  
Author(s):  
Roshni L. Thankamony ◽  
Xiang Li ◽  
Swapan K. Das ◽  
Mayur M. Ostwal ◽  
Zhiping Lai
Keyword(s):  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
Matrix Membranes

Mixed matrix membranes with molecular-interaction-driven tunable free volumes for efficient bio-fuel recovery

2015 ◽  
Vol 3 (8) ◽  
pp. 4510-4521 ◽  
Author(s):  
Gongping Liu ◽  
Wei-Song Hung ◽  
Jie Shen ◽  
Qianqian Li ◽  
Yun-Hsuan Huang ◽  
...  
Keyword(s):  
Polymer Chain ◽  
Molecular Interactions ◽  
Molecular Interaction ◽  
Chain Conformation ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
Polymer Chain Conformation ◽  
Matrix Membranes

Molecular interactions were constructed to control polymer chain conformation to fabricate mixed matrix membranes with tunable free volumes, exhibiting simultaneously improved butanol permeability and selectivity.

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