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Journal articles on the topic 'Permeance matrix'

Author: Grafiati

Published: 4 June 2021

Last updated: 12 February 2022

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1

Nasir, Rizwan, Hilmi Mukhtar, Zakaria Man, Maizatul Shima Bt Shaharun, and Mohamad Zailani Abu Bakar. "Performance Enhancement of Mixed Matrix Membranes through the Incorporation of Alkanolamines for CO2/CH4 Separation." ASEAN Journal of Chemical Engineering 14, no. 2 (2015): 28. http://dx.doi.org/10.22146/ajche.49706.

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Diethanolamine (DEA) solution was used in this study to enhance the performance of polyethersulfone (PES) – carbon molecular sieve (CMS) mixed matrix membrane (MMMs). These new amine mixed matrix membranes (A3Ms) were fabricated at room temperature by using fixed concentration of PES, CMS and different concentrations (5, 10 wt. %) of DEA. The developed mixed matrix membranes were characterized by using field emission scanning electron microscope (FESEM) and thermogravimetric analyser (TGA) in order to investigate the effect of DEA addition on morphology and thermal stability. Gas performance t

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2

Kim, So Young, Younghyun Cho, and Sang Wook Kang. "Correlation between Functional Group and Formation of Nanoparticles in PEBAX/Ag Salt/Al Salt Complexes for Olefin Separation." Polymers 12, no. 3 (2020): 667. http://dx.doi.org/10.3390/polym12030667.

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poly ether-block-amide (PEBAX)-2533/metal salt/Al salt membranes were prepared for mixed olefin/paraffin separation. PEBAX-2533 with 80% ether group and 20% amide group was suggested as the polymer matrix for comparison of separation performance according to the functional group ratio in copolymer PEBAX. In addition, Al salts were used to stabilize metal ions for a long time as additives. High permeance was expected with the proportion of high ether groups, since these functional groups provided relatively permeable regions. As a result, the PEBAX-2533 composite membrane showed a selectivity o

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3

Li, Guoqiang, Wojciech Kujawski, Katarzyna Knozowska, and Joanna Kujawa. "Thin Film Mixed Matrix Hollow Fiber Membrane Fabricated by Incorporation of Amine Functionalized Metal-Organic Framework for CO2/N2 Separation." Materials 14, no. 12 (2021): 3366. http://dx.doi.org/10.3390/ma14123366.

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Membrane separation technology can used to capture carbon dioxide from flue gas. However, plenty of research has been focused on the flat sheet mixed matrix membrane rather than the mixed matrix thin film hollow fiber membranes. In this work, mixed matrix thin film hollow fiber membranes were fabricated by incorporating amine functionalized UiO-66 nanoparticles into the Pebax® 2533 thin selective layer on the polypropylene (PP) hollow fiber supports via dip-coating process. The attenuated total reflection-Fourier transform infrared (ATR-FTIR), scanning electron microscope (SEM), energy-dispers

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4

Zhu, Lifang, Hongwei Yu, Huijuan Zhang, et al. "Mixed matrix membranes containing MIL-53(Al) for potential application in organic solvent nanofiltration." RSC Advances 5, no. 89 (2015): 73068–76. http://dx.doi.org/10.1039/c5ra10259f.

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PMIA MMMs with various amounts of MIL-53(Al) were developed through non-solvent induced phase separation and the MMMs permeance was increased dramatically while keeping high rejections in organic solvent nanofiltration.

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Zhu, Haitao, Xingming Jie, and Yiming Cao. "Fabrication of Functionalized MOFs Incorporated Mixed Matrix Hollow Fiber Membrane for Gas Separation." Journal of Chemistry 2017 (2017): 1–9. http://dx.doi.org/10.1155/2017/2548957.

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The metal-organic framework (MOFs) of MIL-53 was functionalized by aminosilane grafting and then incorporated into Ultem®1000 polymer matrix to fabricate mixed matrix hollow fiber membrane (MMHFM) with high separation performance. SEM, XRD, and TGA were performed to characterize the functionalized MIL-53 and prepared MMHFM. The filler particles were embedded in membrane successfully and dispersed well in the polymer matrix. The incorporation of MOFs endowed MMHFM better thermal stability. Moreover, effects of solvent ratio in spinning dope, spinning condition, and testing temperature on gas se

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6

Park, Cheol Hun, Jung Pyo Jung, Jae Hun Lee, and Jong Hak Kim. "Enhancement of CO2 permeance by incorporating CaCO3 in Mixed Matrix Membranes." Membrane Journal 28, no. 1 (2018): 55–61. http://dx.doi.org/10.14579/membrane_journal.2018.28.1.55.

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7

Nasir, Rizwan, Hilmi Mukhtar, Maizatul Shima Shaharun, and Zakaria Man. "Effect of Carbon Molecular Sieve (CMS) Concentration on Mixed Matrix Membranes (MMMs) Performance for Carbon Dioxide Removal." Applied Mechanics and Materials 754-755 (April 2015): 869–73. http://dx.doi.org/10.4028/www.scientific.net/amm.754-755.869.

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Different compositions of carbon molecular sieve (CMS) were incorporated in polyethersulfone (PES) matrix to fabricate mixed matrix membranes (MMMs) by solution casting method. The characterization was carried out using field emission scanning electron microscopy (FESEM) analysis to investigate the morphology of membrane. FESEM images showed acceptable contacts between the filler particles and the polymer chains. The performance of the developed membrane is analyzed by single gas permeation measurement of high purity CO2 and CH4. Both CO2 permeance and CO2/CH4 selectivity increased with CMS lo

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8

Chakrabarty, Tina, Pradeep Neelakanda, and Klaus-Viktor Peinemann. "CO2 Selective, Zeolitic Imidazolate Framework-7 Based Polymer Composite Mixed-Matrix Membranes." Journal of Materials Science Research 7, no. 3 (2018): 1. http://dx.doi.org/10.5539/jmsr.v7n3p1.

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CO2 removal is necessary to mitigate the effects of global warming but it is a challenging process to separate CO2 from natural gas, biogas, and other gas streams. Development of hybrid membranes by use of polymers and metal-organic framework (MOF) particles is a viable option to overcome this challenge. A ZIF-7 nano-filler that was synthesized in our lab was embedded into a designed polymer matrix at various loadings and the performance of the mixed matrix membranes was evaluated in terms of gas permeance and selectivity. Hybrid membranes with various loadings (20, 30 and 40 wt%) were develop

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9

Lillepärg, Jelena, Evgeni Sperling, Marit Blanke, Martin Held, and Sergey Shishatskiy. "Multicomponent Network Formation in Selective Layer of Composite Membrane for CO2 Separation." Membranes 11, no. 3 (2021): 174. http://dx.doi.org/10.3390/membranes11030174.

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As a promising material for CO2/N2 separation, PolyActiveTM can be used as a separation layer in thin-film composite membranes (TFCM). Prior studies focused on the modification of PolyActiveTM using low-molecular-weight additives. In this study, the effect of chemical crosslinking of reactive end-groups containing additives, forming networks within selective layers of the TFCM, has been studied. In order to understand the influence of a network embedded into a polymer matrix on the properties of the resulting materials, various characterization methods, including Fourier transform infrared spe

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10

Kim, Na Un, Byeong Ju Park, Jae Hun Lee, and Jong Hak Kim. "High-performance ultrathin mixed-matrix membranes based on an adhesive PGMA-co-POEM comb-like copolymer for CO2 capture." Journal of Materials Chemistry A 7, no. 24 (2019): 14723–31. http://dx.doi.org/10.1039/c9ta02962a.

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High-performance membranes are prepared based on UiO-66-NH<sub>2</sub> nanoparticles dispersed in an adhesive PGMA-co-POEM comb-like copolymer. The membranes show excellent separation performance (CO<sub>2</sub> permeance of 1320 GPU and CO<sub>2</sub>/N<sub>2</sub> selectivity of 30.8).

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11

Jamil, Asif, Oh Pei Ching, Muhammad Naqvi, Hafiza Aroosa Aslam Khan, and Salman Raza Naqvi. "Polyetherimide-Montmorillonite Nano-Hybrid Composite Membranes: CO2 Permeance Study via Theoretical Models." Processes 8, no. 1 (2020): 118. http://dx.doi.org/10.3390/pr8010118.

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The incorporation of aminolauric acid modified montmorillonite (f-MMT) in polyetherimide (PEI) has been implemented to develop hollow fibre nano-hybrid composite membranes (NHCMs) with improved gas separation characteristics. The aforementioned characteristics are caused by enhanced f-MMT spatial dispersion and interfacial interactions with PEI matrix. In this study, existing gas permeation models such as, Nielsen, Cussler, Yang–Cussler, Lape–Cussler and Bharadwaj were adopted to estimate the dispersion state of f-MMT and to predict the CO2 permeance in developed NHCMs. It was found out that t

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Ameen, Ahmed W., Peter M. Budd, and Patricia Gorgojo. "Superglassy Polymers to Treat Natural Gas by Hybrid Membrane/Amine Processes: Can Fillers Help?" Membranes 10, no. 12 (2020): 413. http://dx.doi.org/10.3390/membranes10120413.

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Superglassy polymers have emerged as potential membrane materials for several gas separation applications, including acid gas removal from natural gas. Despite the superior performance shown at laboratory scale, their use at industrial scale is hampered by their large drop in gas permeability over time due to physical aging. Several strategies are proposed in the literature to prevent loss of performance, the incorporation of fillers being a successful approach. In this work, we provide a comprehensive economic study on the application of superglassy membranes in a hybrid membrane/amine proces

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13

Nordin, Nik Abdul Hadi Md, Ahmad Fauzi Ismail, Surya Murali Racha, et al. "Limitation in Fabricating PSf/ZIF-8 Hollow Fiber Membrane for CO2/CH4 Separation." Indonesian Journal of Science and Technology 3, no. 2 (2018): 138. http://dx.doi.org/10.17509/ijost.v3i2.12757.

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Hollow fiber membrane configuration is way forward in membrane development since it possesses higher packing density and effective surface area per unit module compared to other configuration. Since majority of mixed matrix membrane (MMM) for gas separation reported focuses on flat sheet membrane development, this report aims to address the challenges faced in fabricating hollow fiber MMM. In this study, hollow fiber formulation is fabricated and their MMM using different types of fillers (virgin and modified ZIF-8) are prepared and used as a dispersed phase. The neat hollow fiber membrane sho

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14

Rafiq, Sikander, Adulhalim Shah Maulud, Zakaria Man, and Nawshad Muhammad. "Gas Permeation Models in Mixed Matrix Membranes for Gas Separation." Advanced Materials Research 917 (June 2014): 317–24. http://dx.doi.org/10.4028/www.scientific.net/amr.917.317.

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Various theoretical models on CO2 permeation were discussed that included Maxwell model, Bruggeman model, Lewis-Nielson model and Pal model. These models were used for comparing the relative permeance of CO2 with the previously published experimental data on silica nanoparticles filled polysulfone/polyimide (PSF/PI) mixed matrix membranes (MMMs). The results showed that the deviation was in the increasing order: Lewis-Nielsen model< Maxwell model< Pal model< Bruggeman model. All these models assumed that the fillers are spherical in shape. A scanning electron microscope (SEM) cross-se

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15

Choi, Ook, Iqubal Hossain, Insu Jeong, Chul-Ho Park, Yeonho Kim, and Tae-Hyun Kim. "Modified Graphene Oxide-Incorporated Thin-Film Composite Hollow Fiber Membranes through Interface Polymerization on Hydrophilic Substrate for CO2 Separation." Membranes 11, no. 9 (2021): 650. http://dx.doi.org/10.3390/membranes11090650.

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Thin-film composite mixed matrix membranes (CMMMs) were fabricated using interfacial polymerization to achieve high permeance and selectivity for CO2 separation. This study revealed the role of substrate properties on performance, which are not typically considered important. In order to enhance the affinity between the substrate and the coating solution during interfacial polymerization and increase the selectivity of CO2, a mixture of polyethylene glycol (PEG) and dopamine (DOPA) was subjected to a spinning process. Then, the surface of the substrate was subjected to interfacial polymerizati

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16

Wang, Guxu, Xin Zhang, Mingjie Wei, and Yong Wang. "Mechanism of permeance enhancement in mixed-matrix reverse osmosis membranes incorporated with graphene and its oxides." Separation and Purification Technology 270 (September 2021): 118818. http://dx.doi.org/10.1016/j.seppur.2021.118818.

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17

Ismail, N. M., A. F. Ismail, A. Mustafa, A. K. Zulhairun, and N. A. H. M. Nordin. "Enhanced carbon dioxide separation by polyethersulfone (PES) mixed matrix membranes deposited with clay." Journal of Polymer Engineering 36, no. 1 (2016): 65–78. http://dx.doi.org/10.1515/polyeng-2015-0048.

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Abstract Asymmetric mixed matrix membranes (MMMs) incorporating Cloisite15A (C15A) clay particles were prepared using solvent evaporation and phase inversion with polyethersulfone (PES) as the membrane matrix. C15A loadings varied at 1 wt% and 5 wt%. Membrane morphological and thermal properties were evaluated by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). Addition of the C15A favorably altered the microscopic structure of membranes from finger-like to homogeneous sponge-like structure as th

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18

Shu, Lun, Lin-Hua Xie, Yingshuang Meng, Tongxin Liu, Cui Zhao, and Jian-Rong Li. "A thin and high loading two-dimensional MOF nanosheet based mixed-matrix membrane for high permeance nanofiltration." Journal of Membrane Science 603 (May 2020): 118049. http://dx.doi.org/10.1016/j.memsci.2020.118049.

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19

Mohshim, Dzeti F., Hilmi Mukhtar, Binay K. Dutta, and Zakaria Man. "Predicting CO2 Permeation through an Enhanced Ionic Liquid Mixed Matrix Membrane (IL3M)." International Journal of Chemical Engineering 2019 (May 2, 2019): 1–10. http://dx.doi.org/10.1155/2019/9525783.

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Ionic liquid mixed matrix membranes (IL3Ms) were synthesized using polyethersulfone (PES) as the base polymer and silica-aluminophosphate (SAPO-34) as the dispersed particles, and their CO2 permeation was investigated. Three of the most widely used models for gas separation—the Maxwell, Lewis–Nielson, and Maxwell–Wagner–Sillar (MWS) models—were then applied to the membranes. Large deviations were found between the model predictions and experimental data. FESEM images suggested that local agglomeration and disorientation of the SAPO-34 particles within the membrane afforded substantial changes

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20

Bakhtin, Danila, Stepan Bazhenov, Victoria Polevaya, et al. "Aging of Thin-Film Composite Membranes Based on Crosslinked PTMSP/PEI Loaded with Highly Porous Carbon Nanoparticles of Infrared Pyrolyzed Polyacrylonitrile." Membranes 10, no. 12 (2020): 419. http://dx.doi.org/10.3390/membranes10120419.

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The mitigation of the physical aging of thin-film composite (TFC) poly[1-trimethylsilyl-1-propyne] (PTMSP) membranes was studied via the simultaneous application of a polymer-selective layer crosslinking and mixed-matrix membrane approach. For the first time, a recently developed highly porous activated carbon material (infrared (IR) pyrolyzed poly[acrylonitrile] (PAN) or IR-PAN-a) was investigated as an additive to a PTMSP-selective layer for the reduction of aging in TFC membranes. The total electric energy spent on the IR irradiation treatment of IR-PAN-a particles was twice lower than conv

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21

des Ligneris, Elise, Ludovic F. Dumée, Riyadh Al-Attabi, Erwan Castanet, Jürg Schütz, and Lingxue Kong. "Mixed Matrix Poly(Vinyl Alcohol)-Copper Nanofibrous Anti-Microbial Air-Microfilters." Membranes 9, no. 7 (2019): 87. http://dx.doi.org/10.3390/membranes9070087.

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Membranes decorated with biocide materials have shown great potential for air sanitization but can suffer from biocide agent leaching by dissolution in water. In order to tackle the diffusion of biocide metal ions from the fiber matrix, composite nanofiber membranes of poly(vinyl alcohol) (PVA) cross-linked with copper (II) acetate have been successfully engineered via sol–gel electrospinning, providing a stable mean for air bactericidal microfiltration. The novelty lies in the bonding strength and homogeneous distribution of the fiber surface biocide, where biocide metals are incorporated as

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22

Julian, Helen, Putu Doddy Sutrisna, Ahmad Nurul Hakim, Herditya Oktania Harsono, Yohanes Antonius Hugo, and I. G. Wenten. "Nano-silica/polysulfone asymmetric mixed-matrix membranes (MMMs) with high CO2 permeance in the application of CO2/N2 separation." Polymer-Plastics Technology and Materials 58, no. 6 (2018): 678–89. http://dx.doi.org/10.1080/03602559.2018.1520253.

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23

Lu, Jiangfeng, Xu Zhang, Lusheng Xu, et al. "Preparation of Amino-Functional UiO-66/PIMs Mixed Matrix Membranes with [bmim][Tf2N] as Regulator for Enhanced Gas Separation." Membranes 11, no. 1 (2021): 35. http://dx.doi.org/10.3390/membranes11010035.

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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 dis

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24

Ren, Xiuxiu, Masakoto Kanezashi, Meng Guo, Rong Xu, Jing Zhong, and Toshinori Tsuru. "Multiple Amine-Contained POSS-Functionalized Organosilica Membranes for Gas Separation." Membranes 11, no. 3 (2021): 194. http://dx.doi.org/10.3390/membranes11030194.

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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

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25

Shafie, Siti Nur Alwani, Wen Xuan Liew, Nik Abdul Hadi Md Nordin, et al. "CO2-Philic [EMIM][Tf2N] Modified Silica in Mixed Matrix Membrane for High Performance CO2/CH4 Separation." Advances in Polymer Technology 2019 (January 3, 2019): 1–10. http://dx.doi.org/10.1155/2019/2924961.

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Separation of carbon dioxide (CO2) from methane (CH4) using polymeric membranes is limited by trade-off between permeability and selectivity as depicted in Robeson curve. To overcome this challenge, this study develops membranes by incorporating silica particles (Si) modified with [EMIM][Tf2N] ionic liquid (IL) at different IL:Si ratio to achieve desirable membrane properties and gas separation performance. Results show that the IL:Si particle has been successfully prepared, indicated by the presence of fluorine and nitrogen elements, as observed via Fourier-Transform Infrared Spectroscopy (FT

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Fauzan, Nur Aqilah Bt, Hilmi Mukhtar, Rizwan Nasir, et al. "Composite amine mixed matrix membranes for high-pressure CO 2 -CH 4 separation: synthesis, characterization and performance evaluation." Royal Society Open Science 7, no. 9 (2020): 200795. http://dx.doi.org/10.1098/rsos.200795.

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The key challenge in the synthesis of composite mixed matrix membrane (MMMs) is the incompatible membrane fabrication using porous support in the dry–wet phase inversion technique. The key objective of this research is to synthesize thin composite ternary (amine) mixed matrix membranes on microporous support by incorporating 10 wt% of carbon molecular sieve (CMS) and 5–15 wt% of diethanolamine (DEA) in polyethersulfone (PES) dope solution for the separation of carbon dioxide (CO 2 ) from methane (CH 4 ) at high-pressure applications. The developed membranes were evaluated for their morphologic

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27

Cristóvão, Maria Beatriz, Solomon Tela, Andreia Filipa Silva, et al. "Occurrence of Antibiotics, Antibiotic Resistance Genes and Viral Genomes in Wastewater Effluents and Their Treatment by a Pilot Scale Nanofiltration Unit." Membranes 11, no. 1 (2020): 9. http://dx.doi.org/10.3390/membranes11010009.

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Broad-spectrum fluoroquinolone antibiotics (ciprofloxacin and levofloxacin), carbapenem and fluoroquinolone resistance genes, as well as viral genomes, were detected in grab samples of wastewater effluents. Passive samplers, which are simpler and easier to use and provide information about the concentrations and combination of contaminants present in a certain fluid matrix over time, proved to be extremely promising devices to monitor the presence of the target antibiotics in wastewater effluents. Nanofiltration was tested with a pilot-scale unit installed at a domestic wastewater treatment fa

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28

Castejón, Pilar, Marcelo Antunes, and David Arencón. "Development of Inorganic Particle-Filled Polypropylene/High Density Polyethylene Membranes via Multilayer Co-Extrusion and Stretching." Polymers 13, no. 2 (2021): 306. http://dx.doi.org/10.3390/polym13020306.

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This work is made to ascertain the effects of mineral fillers, namely calcium carbonate and talc, on the morphology and properties of multilayer polypropylene (PP)/high-density polyethylene (HDPE) porous membranes. Multilayer membranes were prepared using the three-stage Melt-Extrusion, Annealing and Uniaxial Stretching (MEAUS) process. The orientation of PP’s crystalline phase was affected by both the flow-induced crystallization and the heterogeneous nucleation promoted by the fillers. A synergistic effect was observed in the filled samples due to the generation of pores after the stretching

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Perea-Cachero, Adelaida, Miren Etxeberría-Benavides, Oana David, et al. "Pre-combustion gas separation by ZIF-8-polybenzimidazole mixed matrix membranes in the form of hollow fibres—long-term experimental study." Royal Society Open Science 8, no. 9 (2021): 210660. http://dx.doi.org/10.1098/rsos.210660.

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Polybenzimidazole (PBI) is a promising and suitable membrane polymer for the separation of the H 2 /CO 2 pre-combustion gas mixture due to its high performance in terms of chemical and thermal stability and intrinsic H 2 /CO 2 selectivity. However, there is a lack of long-term separation studies with this polymer, particularly when it is conformed as hollow fibre membrane. This work reports the continuous measurement of the H 2 /CO 2 separation properties of PBI hollow fibres, prepared as mixed matrix membranes with metal-organic framework (MOF) ZIF-8 as filler. To enhance the scope of the exp

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30

Nikolaeva, Daria, Sandrine Loïs, Paul Inge Dahl, et al. "Water Vapour Promotes CO2 Transport in Poly(ionic liquid)/Ionic Liquid-Based Thin-Film Composite Membranes Containing Zinc Salt for Flue Gas Treatment." Applied Sciences 10, no. 11 (2020): 3859. http://dx.doi.org/10.3390/app10113859.

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A poly(ionic-liquid) (PIL) matrix can be altered by incorporating additives that will disrupt the polymer chain packing, such as an ionic liquid (IL) and inorganic salts to boost their exploitation as materials for membrane production to be used in CO2 capture. Herein, potential of PIL/IL/salt blends is investigated on the example of poly(diallyldimethyl ammonium) bis(trifluoromethylsulfonyl)imide (P[DADMA][Tf2N]) with N-butyl-N-methyl pyrrolidinium bis(trifluoromethylsulfonyl)imide ([Pyrr14][Tf2N]) and zinc di-bis(trifluoromethylsulfonyl)imide (Zn[Tf2N]2). Composite material with IL and a hig

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Nosrati, Amin, and Jalal Nazarzadeh. "Analysis of linear induction machines with internal fault by MEC." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 36, no. 4 (2017): 959–79. http://dx.doi.org/10.1108/compel-08-2016-0360.

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Purpose The purpose of this paper is to introduce an asymmetric structure of the magnetic equivalent circuit (MEC) for analysis of the linear induction machine (LIM) with an internal short circuit fault. Design/methodology/approach By applying a proper MEC to the LIM, a generalized relation for the inductance matrix of the machine can be directly determined. To evaluate the proposed model, the stator currents and the air-gap flux with the proposed technique are given and compared to the simulation and experimental results in the healthy and fault conditions. Findings The LIM is an axial flux m

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32

Villalobos, Luis Francisco, Cédric Van Goethem, Kuang-Jung Hsu, et al. "Bottom-up synthesis of graphene films hosting atom-thick molecular-sieving apertures." Proceedings of the National Academy of Sciences 118, no. 37 (2021): e2022201118. http://dx.doi.org/10.1073/pnas.2022201118.

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Incorporation of a high density of molecular-sieving nanopores in the graphene lattice by the bottom-up synthesis is highly attractive for high-performance membranes. Herein, we achieve this by a controlled synthesis of nanocrystalline graphene where incomplete growth of a few nanometer-sized, misoriented grains generates molecular-sized pores in the lattice. The density of pores is comparable to that obtained by the state-of-the-art postsynthetic etching (1012 cm−2) and is up to two orders of magnitude higher than that of molecular-sieving intrinsic vacancy defects in single-layer graphene (S

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33

Moreira, Francine do Couto Lima, Nelson Roberto Antoniosi Filho, João Batista de Souza, and Lawrence Gonzaga Lopes. "Sorption, solubility and residual monomers of a dental adhesive cured by different light-curing units." Brazilian Dental Journal 21, no. 5 (2010): 432–38. http://dx.doi.org/10.1590/s0103-64402010000500010.

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The aim of this study was to assess polymerization ability of three light-curing units by evaluating the influence of the light source, curing regimen and permeant (water or ethanol) on sorption, solubility and amount of residual monomers of a dental adhesive. Specimens of Adper Single Bond 2 were fabricated using a stainless steel circular matrix (8 mm x 1 mm). One quartz-tungsten-halogen (QTH) lamp and two light-emitting diode (LED) device at three different curing regimes (L1 = 12 J; L2 = 24 J; L3 = 24 J) were used to cure the specimens. Specimens were stored in two types of permeants - dei

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Smith, Stefan J. D., Rujing Hou, Cher Hon Lau, et al. "Highly permeable Thermally Rearranged Mixed Matrix Membranes (TR-MMM)." Journal of Membrane Science 585 (September 2019): 260–70. http://dx.doi.org/10.1016/j.memsci.2019.05.046.

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35

Zhang, Shiping, and Litang Yan. "Development of an Efficient Oil Film Damper for Improving the Control of Rotor Vibration." Journal of Engineering for Gas Turbines and Power 113, no. 4 (1991): 557–62. http://dx.doi.org/10.1115/1.2906277.

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An efficient oil film damper known as a porous squeeze film damper (PSFD) was developed for more effective and reliable vibration control of high-speed rotors based on the conventional squeeze film damper (SFD). The outer race of the PSFD is made of permeable sintered porous metal materials. The permeability allows some of the oil to permeate into and seep out of the porous matrix, with remarkable improvement of the squeeze film damping properties. The characteristics of PSFD oil film stiffness and damping coefficients and permeability, and also, the steady-state unbalance response of a simple

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Ling, Bowen, Alexandre M. Tartakovsky, and Ilenia Battiato. "Dispersion controlled by permeable surfaces: surface properties and scaling." Journal of Fluid Mechanics 801 (July 19, 2016): 13–42. http://dx.doi.org/10.1017/jfm.2016.431.

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Permeable and porous surfaces are common in natural and engineered systems. Flow and transport above such surfaces are significantly affected by the surface properties, e.g. matrix porosity and permeability. However, the relationship between such properties and macroscopic solute transport is largely unknown. In this work, we focus on mass transport in a two-dimensional channel with permeable porous walls under fully developed laminar flow conditions. By means of perturbation theory and asymptotic analysis, we derive the set of upscaled equations describing mass transport in the coupled channe

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Lund, Patricia, and David Wiggins. "The matrix water space of mitochondria in situ in isolated hepatocytes." Bioscience Reports 7, no. 1 (1987): 59–66. http://dx.doi.org/10.1007/bf01122728.

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The intracellular and mitochondrial matrix water-permeable spaces were measured in intact, respiring hepatocytes from normal fed, 48 h starved, and protein fed rats. The mitochondrial matrix constitutes 15–20 % of the total intracellular water, a proportion greater than has generally been assumed.

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Zhao, Qianqian, Jingwei Hou, Jiangnan Shen, Jindun Liu, and Yatao Zhang. "Long-lasting antibacterial behavior of a novel mixed matrix water purification membrane." Journal of Materials Chemistry A 3, no. 36 (2015): 18696–705. http://dx.doi.org/10.1039/c5ta06013c.

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Matthäi, Stephan K., and Mandefro Belayneh. "Fluid flow partitioning between fractures and a permeable rock matrix." Geophysical Research Letters 31, no. 7 (2004): n/a. http://dx.doi.org/10.1029/2003gl019027.

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Abedini, Reza, Mohammadreza Omidkhah, and Fatereh Dorosti. "Highly permeable poly(4-methyl-1-pentyne)/NH2-MIL 53 (Al) mixed matrix membrane for CO2/CH4 separation." RSC Adv. 4, no. 69 (2014): 36522–37. http://dx.doi.org/10.1039/c4ra07030e.

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Kryuchkov, Yu N. "Structural analysis of permeable powder materials with random and matrix structures." Powder Metallurgy and Metal Ceramics 33, no. 3-4 (1995): 177–80. http://dx.doi.org/10.1007/bf00559780.

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Zhong, Zhen, Yun Jin Hu, Xin Hai Zhang, and Guo Long Chen. "Laboratory Study of Unsaturated Flow in a Single Fracture-Matrix System: A Conceptual Model." Applied Mechanics and Materials 212-213 (October 2012): 377–82. http://dx.doi.org/10.4028/www.scientific.net/amm.212-213.377.

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A conceptual laboratory model for studying unsaturated flow in a single fracture-matrix system is developed in this paper. The model is capable of simulating the fracture and matrix with different samples, and three groups of contrastive experiments are conducted under a constant rainfall. The results show that fracture-matrix interactions have a great effect on the hydraulic properties of the fracture and matrix. The more distinctive the sample used to simulate the fracture and matrix is, the greater the influence is. Furthermore, the wetting front along the matrix runs ahead of that along th

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Shukla, Arun Kumar, Javed Alam, Fekri Abdulraqeb Ahmed Ali, and Mansour Alhoshan. "A highly permeable zinc-based MOF/polyphenylsulfone composite membrane with elevated antifouling properties." Chemical Communications 56, no. 39 (2020): 5231–34. http://dx.doi.org/10.1039/d0cc01499k.

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In this study, for the first time, a highly permeable composite membrane was constructed by incorporating a zinc-based metal–organic framework (Zn-MOF) in a polyphenylsulfone matrix for the elevation of antifouling properties.

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Li, Xu, Chonggen Pan, Dong Li, et al. "Design of CNS-Li2SiO3 Permeable Protective Coatings and Effects on Mortar Matrix." Materials 13, no. 7 (2020): 1733. http://dx.doi.org/10.3390/ma13071733.

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In this paper, we prepared permeable protective coatings composed of lithium silicate (Li2SiO3), where the coating was modified by colloidal nano-silica (CNS). Three levels of lithium silicate (i.e., 30 wt. %; 40 wt. %; 50 wt. %), sodium silicate (i.e., 5 wt. %; 10 wt. %; 15 wt. %), and surfactant (i.e., 0.05 wt. %; 0.1 wt. %; 0.15 wt. %) were involved in this study. An orthogonal experiment design selected the optimal proportion basedon thestrength and water absorption requirements of mortar. The effects of CNS-Li2SiO3 coating on the resistance to permeability of chloride ions and carbonation

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Kim, Young Jun, Seung Jae Moon, and Jong Hak Kim. "Highly-permeable SBS/UiO-66 Mixed Matrix Membranes for CO2/N2 Separation." Membrane Journal 30, no. 5 (2020): 319–25. http://dx.doi.org/10.14579/membrane_journal.2020.30.5.319.

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Qiao, Zhihua, Song Zhao, Jixiao Wang, Shichang Wang, Zhi Wang, and Michael D. Guiver. "A Highly Permeable Aligned Montmorillonite Mixed‐Matrix Membrane for CO 2 Separation." Angewandte Chemie 128, no. 32 (2016): 9467–71. http://dx.doi.org/10.1002/ange.201603211.

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Qiao, Zhihua, Song Zhao, Jixiao Wang, Shichang Wang, Zhi Wang, and Michael D. Guiver. "A Highly Permeable Aligned Montmorillonite Mixed‐Matrix Membrane for CO 2 Separation." Angewandte Chemie International Edition 55, no. 32 (2016): 9321–25. http://dx.doi.org/10.1002/anie.201603211.

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Gao, Jinfang, and Huiling Xing. "LBM simulation of fluid flow in fractured porous media with permeable matrix." Theoretical and Applied Mechanics Letters 2, no. 3 (2012): 032001. http://dx.doi.org/10.1063/2.1203201.

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Hosseinabadi, Navid. "The alkaline-earth metal alanate embedded selective gas permeable PMMA matrix-nanocomposite." International Journal of Hydrogen Energy 46, no. 2 (2021): 2362–75. http://dx.doi.org/10.1016/j.ijhydene.2020.10.125.

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Kisil, A., and L. J. Ayton. "Aerodynamic noise from rigid trailing edges with finite porous extensions." Journal of Fluid Mechanics 836 (December 11, 2017): 117–44. http://dx.doi.org/10.1017/jfm.2017.782.

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This paper investigates the effects of finite flat porous extensions to semi-infinite impermeable flat plates in an attempt to control trailing-edge noise through bio-inspired adaptations. Specifically the problem of sound generated by a gust convecting in uniform mean steady flow scattering off the trailing edge and the permeable–impermeable junction is considered. This set-up supposes that any realistic trailing-edge adaptation to a blade would be sufficiently small so that the turbulent boundary layer encapsulates both the porous edge and the permeable–impermeable junction, and therefore th

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