Kinetics studies on free radical scavenging property of ceria in polysulfone–ceria radiation resistant mixed-matrix membrane

Abstract Cerium oxide (ceria) contains two stable states of cerium ions (Ce3+ and Ce4+). The presence of these two states and the ability to swap from one state to another (Ce3+ ↔ Ce4+) by scavenging the highly reactive oxygen species (ROS) generated from radiolysis of water, ensure the enhanced stability of polysulfone (Psf) membranes in the γ-radiation environment. In this study, the ROS scavenging ability of ceria was studied. Ceria nanoparticles were found to scavenge ROS like hydroxyl radicals and hydrogen peroxide (H2O2). The H2O2 scavenging is due to the peroxidase-like catalytic activity of ceria nanoparticles. The ROS scavenging is responsible for offering protection to the Psf host matrix and in turn the stability to the Psf-ceria mixed-matrix membranes (MMMs) in γ-radiation environment. Thus, presence of ceria nanoparticles provides an opportunity for utilizing Psf-ceria MMMs in ionizing radiation environment with increased life span, without compromise in the performance.

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Multiple Amine-Contained POSS-Functionalized Organosilica Membranes for Gas Separation

Membranes ◽

10.3390/membranes11030194 ◽

2021 ◽

Vol 11 (3) ◽

pp. 194

Author(s):

Xiuxiu Ren ◽

Masakoto Kanezashi ◽

Meng Guo ◽

Rong Xu ◽

Jing Zhong ◽

...

Keyword(s):

Gas Separation ◽

Mixed Matrix Membranes ◽

Mixed Matrix Membrane ◽

Separation Performance ◽

Hybrid Membranes ◽

Mixed Matrix ◽

Translation Model ◽

Good Thermal Stability ◽

Oligomeric Silsesquioxane

A new polyhedral oligomeric silsesquioxane (POSS) designed with eight –(CH2)3–NH–(CH2)2–NH2 groups (PNEN) at its apexes was used as nanocomposite uploading into 1,2-bis(triethoxysilyl)ethane (BTESE)-derived organosilica to prepare mixed matrix membranes (MMMs) for gas separation. The mixtures of BTESE-PNEN were uniform with particle size of around 31 nm, which is larger than that of pure BTESE sols. The characterization of thermogravimetric (TG) and gas permeance indicates good thermal stability. A similar amine-contained material of 3-aminopropyltriethoxysilane (APTES) was doped into BTESE to prepare hybrid membranes through a copolymerized strategy as comparison. The pore size of the BTESE-PNEN membrane evaluated through a modified gas-translation model was larger than that of the BTESE-APTES hybrid membrane at the same concentration of additions, which resulted in different separation performance. The low values of Ep(CO2)-Ep(N2) and Ep(N2) for the BTESE-PNEN membrane at a low concentration of PNEN were close to those of copolymerized BTESE-APTES-related hybrid membranes, which illustrates a potential CO2 separation performance by using a mixed matrix membrane strategy with multiple amine POSS as particles.

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The Effect of the Temperature and Moisture to the Permeation Properties of PEO-Based Membranes for Carbon-Dioxide Separation

Polymers ◽

10.3390/polym13132053 ◽

2021 ◽

Vol 13 (13) ◽

pp. 2053

Author(s):

Dragutin Nedeljkovic

Keyword(s):

Carbon Dioxide ◽

Partial Pressure ◽

Carbon Dioxide Emission ◽

Combustion Products ◽

Mixed Matrix Membranes ◽

Mixed Matrix Membrane ◽

Mixed Matrix ◽

Gas Treatment ◽

Carbon Dioxide Separation ◽

Different Temperatures

An increased demand for energy in recent decades has caused an increase in the emissions of combustion products, among which carbon-dioxide is the most harmful. As carbon-dioxide induces negative environmental effects, like global warming and the greenhouse effect, a decrease of the carbon-dioxide emission has emerged as one of the most urgent tasks in engineering. In this work, the possibility for the application of the polymer-based, dense, mixed matrix membranes for flue gas treatment was tested. The task was to test a potential decrease in the permeability and selectivity of a mixed-matrix membrane in the presence of moisture and at elevated temperature. Membranes are based on two different poly(ethylene oxide)-based polymers filled with two different zeolite powders (ITR and IWS). An additive of detergent type was added to improve the contact properties between the zeolite and polymer matrix. The measurements were performed at three different temperatures (30, 60, and 90 °C) under wet conditions, with partial pressure of the water equal to the vapor pressure of the water at the given temperature. The permeability of carbon-dioxide, hydrogen, nitrogen, and oxygen was measured, and the selectivity of the carbon-dioxide versus other gases was determined. Obtained results have shown that an increase of temperature and partial pressure of the vapor slightly increase both the selectivity and permeability of the synthesized membranes. It was also shown that the addition of the zeolite powder increases the permeability of carbon-dioxide while maintaining the selectivity, compared to hydrogen, oxygen, and nitrogen.

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THE EFFECT OF TYPE ZEOLITE ON THE GAS TRANSPORT PROPERTIES OF POLYIMIDE-BASED MIXED MATRIX MEMBRANES

REAKTOR ◽

10.14710/reaktor.12.2.68-77 ◽

2008 ◽

Vol 12 (2) ◽

pp. 68 ◽

Cited By ~ 10

Author(s):

Tutuk Djoko Kusworo ◽

Ahmad Fauzi Ismail ◽

Azeman Mustafa ◽

Kang Li

Keyword(s):

Mixed Matrix Membranes ◽

Mixed Matrix Membrane ◽

Separation Performance ◽

Mixed Matrix ◽

Scanning Calorimetry ◽

Zeolite 4A ◽

Intensity Changes ◽

Zeolite Type ◽

Type Zeolite ◽

Matrix Membranes

The permeation rates of O2, N2, CO2 and CH4 has been studied for polyimide-polyethersulfone (PI/PES) blends-zeolite mixed matrix membranes synthesized in our laboratory. The study investigated the effect of zeolite loading and different zeolite type on the gas separation performance of these mixed matrix membranes. Frequency shifts and absorption intensity changes in the FTIR spectra of the PI/PES blends as compared with those of the pure polymers indicate that there is a mixing of polymer blends at the molecular level. Differential scanning calorimetry measurements of pure and PI/PES blends membranes have showed one unique glass transition temperature that supports the miscible character of the PI/PES mixture. The PI/PES-zeolite 4A mixed matrix membrane with 25 wt % zeolite loading produced the highest O2/N2 and CO2/CH4 selectivity of around 7.45 and 46.05, respectively.

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P84/Zeolite-Carbon Composite Mixed Matrix Membrane for CO2/CH4 Separation

Indonesian Journal of Chemistry ◽

10.22146/ijc.35727 ◽

2019 ◽

Vol 19 (3) ◽

pp. 650 ◽

Cited By ~ 1

Author(s):

Triyanda Gunawan ◽

Retno Puji Rahayu ◽

Rika Wijiyanti ◽

Wan Norharyati Wan Salleh ◽

Nurul Widiastuti

Keyword(s):

Carbon Composite ◽

Gas Permeation ◽

Mixed Matrix Membranes ◽

Mixed Matrix Membrane ◽

Inversion Method ◽

Mixed Matrix ◽

Force Microscopy ◽

Membrane Performance ◽

Polyimide Membrane ◽

Phase Inversion Method

Mixed Matrix Membranes (MMMs) which consist of 0.3 wt.% Zeolite-Carbon Composite (ZCC) dispersed in BTDA-TDI/MDI (P84 co-polyimide) have been prepared through phase inversion method by using N-methyl-2-pyrrolidone (NMP) as a solvent. Membranes were characterized by X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM), Thermogravimetric Analysis (TGA), and Fourier Transform Infrared (FTIR). Membrane performance was measured by a single gas permeation of CO2 and CH4. The maximum permeability of CO2 and CH4, which up to 12.67 and 6.03 Barrer, respectively. P84/ZCC mixed matrix membrane also showed a great enhancement in ideal selectivity of CO2/CH4 2.10 compared to the pure P84 co-polyimide membrane.

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Recovery of acetone from aqueous solution by ZIF-7/PDMS mixed matrix membranes

RSC Advances ◽

10.1039/c4ra15771k ◽

2015 ◽

Vol 5 (36) ◽

pp. 28394-28400 ◽

Cited By ~ 23

Author(s):

Yunpan Ying ◽

Yuanlong Xiao ◽

Jing Ma ◽

Xiangyu Guo ◽

Hongliang Huang ◽

...

Keyword(s):

Aqueous Solution ◽

Mixed Matrix Membranes ◽

Mixed Matrix Membrane ◽

Mixed Matrix ◽

Excellent Performance ◽

Fermentation Broths ◽

Matrix Membranes

Mixed matrix membrane containing ZIF-7 exhibits the excellent performance in the recovery of acetone from fermentation broths.

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Enhanced O2/N2 Separation of Mixed-Matrix Membrane Filled with Pluronic-Compatibilized Cobalt Phthalocyanine Particles

Membranes ◽

10.3390/membranes10040075 ◽

2020 ◽

Vol 10 (4) ◽

pp. 75 ◽

Cited By ~ 4

Author(s):

S. A. S. C. Samarasinghe ◽

Chong Yang Chuah ◽

H. Enis Karahan ◽

G. S. M. D. P. Sethunga ◽

Tae-Hyun Bae

Keyword(s):

High Performance ◽

Polymeric Materials ◽

Polymeric Membranes ◽

Air Separation ◽

Industrial Processes ◽

Mixed Matrix Membranes ◽

Mixed Matrix Membrane ◽

Mixed Matrix ◽

Interfacial Defects ◽

The Matrix

Membrane-based air separation (O2/N2) is of great importance owing to its energy efficiency as compared to conventional processes. Currently, dense polymeric membranes serve as the main pillar of industrial processes used for the generation of O2- and N2-enriched gas. However, conventional polymeric membranes often fail to meet the selectivity needs owing to the similarity in the effective diameters of O2 and N2 gases. Meanwhile, mixed-matrix membranes (MMMs) are convenient to produce high-performance membranes while keeping the advantages of polymeric materials. Here, we propose a novel MMM for O2/N2 separation, which is composed of Matrimid® 5218 (Matrimid) as the matrix, cobalt(II) phthalocyanine microparticles (CoPCMPs) as the filler, and Pluronic® F-127 (Pluronic) as the compatibilizer. By the incorporation of CoPCMPs to Matrimid, without Pluronic, interfacial defects were formed. Pluronic-treated CoPCMPs, on the other hand, enhanced O2 permeability and O2/N2 selectivity by 64% and 34%, respectively. We explain the enhancement achieved with the increase of both O2 diffusivity and O2/N2 solubility selectivity.

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INCORPORATION OF IMPRINTED-ZEOLITE TO POLYETHERSULFONE/CELLULOSE ACETATE MEMBRANE FOR CREATININE REMOVAL IN HEMODIALYSIS TREATMENT

Jurnal Teknologi ◽

10.11113/jt.v81.13075 ◽

2019 ◽

Vol 81 (3) ◽

Author(s):

Yanuardi Raharjo ◽

Mochamad Zakki Fahmi ◽

Siti Wafiroh ◽

Alfa Akustia Widati ◽

Eviomitta Rizki Amanda ◽

...

Keyword(s):

Cellulose Acetate ◽

Pure Water ◽

Water Flux ◽

Hollow Fibre ◽

Mixed Matrix Membranes ◽

Mixed Matrix Membrane ◽

Cellulose Acetate Membrane ◽

Zeolite A ◽

Mixed Matrix ◽

Water Contact

Polyethersulfon (PES) membrane has been widely used in the biomedical field especially in hemodialysis application. Many modifications of membranes have been applied into hemodialysis such as diffusion, adsorption, and mixed-matrix membrane. The main problem of those membranes is less selectivity to attract the uremic toxins. In this study, we report the modification of PES mixed with cellulose acetate (PES/CA) membrane as mixed-matrix membrane (MMM) using imprinted-zeolite (PES/CA/IZC) in order to increase the selectivity for targeted analyte. The hollow fibre membranes (HFM) were fabricated by dry-wet spinning technique. The successful zeolite A synthesised and was characterised by x-ray diffraction (XRD). The mixed-matrix membranes were characterised in terms of morphology using scanning electron microscopy (SEM), water contact angle (WCA), pure water flux (PWF), clearance of creatinine (CC), and BSA adsorption. In accordance with the results of characterisation, the synthesis of zeolite A, and imprinted-zeolite creatinine was successfully fabricated. The SEM results showed that the PES/CA/IZC membrane has uniform pores and fingerlike structure. The same result was obtained for PES/CA membrane, but not for PES/CA/ZA membrane. The WCA of the PES/CA; PES/CA/ZA; and PES/CA/IZC were 85.63; 84.98; and 77.53 (o), respectively. While the PWF were 22.84; 27.57, and 40.52 (Lm-2h-1), respectively. The addition of imprinted-zeolite into the membrane improved creatinine removal up to 74.99%. It showed that PES/CA/IZC has succeeded in increasing the selectivity of membranes to attract the creatinine as target analyte. Compared to the PES/CA, the creatinine clearance of membranes improved and increased up to 5.2%. For protein rejection, the PES/CA/IZC rejected 79.05% of bovine serum albumin (BSA). Based on these results, it can be concluded that PES/CA/IZC can be considered as hemodialysis membranes.

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CO2-philic moderate selective layer mixed matrix membranes containing surface functionalized NaX towards highly-efficient CO2 capture

RSC Advances ◽

10.1039/c9ra01654f ◽

2019 ◽

Vol 9 (27) ◽

pp. 15542-15553 ◽

Cited By ~ 6

Author(s):

Mohammad Salehi Maleh ◽

Ahmadreza Raisi

Keyword(s):

Co2 Capture ◽

Mixed Matrix Membranes ◽

Mixed Matrix Membrane ◽

Mixed Matrix ◽

Promising Candidate ◽

Selective Layer ◽

Highly Efficient ◽

Industrial Gases ◽

Matrix Membranes

A functional moderate selective layer mixed matrix membrane (F-MSL-MMM) is a promising candidate to obtain superior separation of industrial gases, compared to commonly mixed matrix membranes.

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Evaluation of the Properties, Gas Permeability, and Selectivity of Mixed Matrix Membrane Based on Polysulfone Polymer Matrix Incorporated with KIT-6 Silica

Polymers ◽

10.3390/polym11111732 ◽

2019 ◽

Vol 11 (11) ◽

pp. 1732 ◽

Cited By ~ 2

Author(s):

Sie Hao Ding ◽

Tiffany Yit Siew Ng ◽

Thiam Leng Chew ◽

Pei Ching Oh ◽

Abdul Latif Ahmad ◽

...

Keyword(s):

Carbon Dioxide ◽

Polymer Matrix ◽

Pressure Difference ◽

Gas Permeability ◽

Gas Permeation ◽

Mixed Matrix Membranes ◽

Mixed Matrix Membrane ◽

Mixed Matrix ◽

Carbon Dioxide Co2 ◽

The Ideal

Mixed matrix membranes (MMMs) separation is a promising technology for gas permeation and separation involving carbon dioxide (CO2). However, finding a suitable type of filler for the formation of defect-free MMMs with enhancement in gas permeability remains a challenge. Current study focuses on synthesis of KIT-6 silica and followed by the incorporation of KIT-6 silica as filler into polysulfone (PSF) polymer matrix to fabricate MMMs, with filler loadings of 0–8 wt %. The effect of KIT-6 incorporation on the properties of the fabricated MMMs was evaluated via different characterization techniques. The MMMs were investigated for gas permeability and selectivity with pressure difference of 5 bar at 25 °C. KIT-6 with typical rock-like morphology was synthesized. Incorporation of 2 wt % of KIT-6 into PSF matrix produced MMMs with no void. When KIT-6 loadings in the MMMs were increased from 0 to 2 wt %, the CO2 permeability increased by ~48%, whereas the ideal CO2/CH4 selectivity remained almost constant. However, when the KIT-6 loading in PSF polymer matrix was more than 2 wt %, the formation of voids in the MMMs increased the CO2 permeability but sacrificed the ideal CO2/CH4 selectivity. In current study, KIT-6 was found to be potential filler for PSF matrix under controlled KIT-6 loading for gas permeation.

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Carbon Nanotubes Based Mixed Matrix Membrane for Gas Separation

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.364.272 ◽

2011 ◽

Vol 364 ◽

pp. 272-277 ◽

Cited By ~ 4

Author(s):

S.M. Sanip ◽

A.F. Ismail ◽

P.S. Goh ◽

M.N.A. Norrdin ◽

T. Soga ◽

...

Keyword(s):

Electron Microscopy ◽

Carbon Nanotubes ◽

Gas Separation ◽

Polymer Matrix ◽

Current Trend ◽

Mixed Matrix Membranes ◽

Mixed Matrix Membrane ◽

Separation Performance ◽

Mixed Matrix ◽

Polyimide Membrane

Mixed matrix membranes (MMM) combine useful molecular sieving properties of inorganic fillers with the desirable mechanical and processing properties of polymers. The current trend in polymeric membranes is the incorporation of filler-like nanoparticles to improve the separation performance. Most MMM have shown higher gas permeabilities and improved gas selectivities compared to the corresponding pure polymer membranes. Carbon nanotubes based mixed matrix membrane was prepared by the solution casting method in which the functionalized multiwalled carbon nanotubes (f-MWNTs) were embedded into the polyimide membrane and the resulting membranes were characterized. The effect of nominal MWNTs content between 0.5 and 1.0 wt% on the gas separation properties were looked into. The as-prepared membranes were characterized for their morphology using field emission scanning electron microscopy (FESEM) and Transmission Electron Microscopy (TEM). The morphologies of the MMM also indicated that at 0.7 % loading of f-MWNTs, the structures of the MMM showed uniform finger-like structures which have facilitated the fast gas transport through the polymer matrix. It may also be concluded that addition of open ended and shortened MWNTs to the polymer matrix can improve its permeability by increasing diffusivity through the MWNTs smooth cavity.

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