Separation of DMMP/Water Vapor with PDMS/Silica Membranes for the Sample Inlet of Ion Mobility Spectrometers

2014 ◽  
Vol 1049-1050 ◽  
pp. 142-147
Author(s):  
Mo Lin Qin ◽  
Cheng Hai Guo ◽  
Liu Yang ◽  
Jian Jun Zhao
Keyword(s):  
Water Vapor ◽  
Ion Mobility ◽  
Silicone Rubber ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
Dimethyl Methylphosphonate ◽  
Silica Membranes ◽  
The Matrix ◽  
Different Thickness ◽  
Maximum Separation

In order to obtain an ideal sample inlet membrane for ion mobility spectrometers (IMS), fumed silica was modified using hexamethyldisilazane and was incorporated into the matrix of polydimethylsiloxane (PDMS) silicone rubber to fabricate PDMS/silica mixed matrix membranes with different thickness. Dimethyl methylphosphonate (DMMP) permeability of thin silicone rubber membranes (SRM) with the least thickness of approximate 5μm was studied. DMMP concentration interior to the SRM showed the linear correlation to that external to the SRM. Thickness and temperature of SRM were two important factors influencing the permeation proportion of DMMP. Most water vapor was prevented to transfer through the SRM. In addition, the SRM had a good selectivity of DMMP/water vapor and the maximum separation factor was 4.82 when the temperature of membranes reached 80 °C.

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

Membranes ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 75 ◽  
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.

scholarly journals Magnetically Aligned and Enriched Pathways of Zeolitic Imidazolate Framework 8 in Matrimid Mixed Matrix Membranes for Enhanced CO2 Permeability

Membranes ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 155 ◽  
Author(s):  
Machiel van Essen ◽  
Esther Montrée ◽  
Menno Houben ◽  
Zandrie Borneman ◽  
Kitty Nijmeijer
Keyword(s):  
Design Parameters ◽  
Mixed Matrix Membranes ◽  
Co2 Uptake ◽  
Mixed Matrix ◽  
Zeolitic Imidazolate Framework ◽  
Weight Content ◽  
The Matrix ◽  
Metal Organic ◽  
Magnetically Aligned ◽  
Matrix Membranes

Metal-organic frameworks (MOFs) as additives in mixed matrix membranes (MMMs) for gas separation have gained significant attention over the past decades. Many design parameters have been investigated for MOF based MMMs, but the spatial distribution of the MOF throughout MMMs lacks investigation. Therefore, magnetically aligned and enriched pathways of zeolitic imidazolate framework 8 (ZIF−8) in Matrimid MMMs were synthesized and investigated by means of their N2 and CO2 permeability. Magnetic ZIF−8 (m–ZIF−8) was synthesized by incorporating Fe3O4 in the ZIF−8 structure. The presence of Fe3O4 in m–ZIF−8 showed a decrease in surface area and N2 and CO2 uptake, with respect to pure ZIF−8. Alignment of m–ZIF−8 in Matrimid showed the presence of enriched pathways of m–ZIF−8 through the MMMs. At 10 wt.% m–ZIF−8 incorporation, no effect of alignment was observed for the N2 and CO2 permeability, which was ascribed anon-ideal tortuous alignment. However, alignment of 20 wt.% m–ZIF−8 in Matrimid showed to increase the CO2 diffusivity and permeability (19%) at 7 bar, while no loss in ideal selectivity was observed, with respect to homogeneously dispersed m–ZIF−8 membranes. Thus, the alignment of MOF particles throughout the matrix was shown to enhance the CO2 permeability at a certain weight content of MOF.

scholarly journals Transparent Metal–Organic Framework/Polymer Mixed Matrix Membranes as Water Vapor Barriers

2016 ◽  
Vol 8 (16) ◽  
pp. 10098-10103 ◽  
Author(s):  
Youn Jue Bae ◽  
Eun Seon Cho ◽  
Fen Qiu ◽  
Daniel T. Sun ◽  
Teresa E. Williams ◽  
...  
Keyword(s):  
Water Vapor ◽  
Metal Organic Framework ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
Metal Organic ◽  
Organic Framework ◽  
Matrix Membranes

Gas Permeation Models in Mixed Matrix Membranes for Gas Separation

2014 ◽  
Vol 917 ◽  
pp. 317-324 ◽  
Author(s):  
Sikander Rafiq ◽  
Adulhalim Shah Maulud ◽  
Zakaria Man ◽  
Nawshad Muhammad
Keyword(s):  
Maxwell Model ◽  
Theoretical Models ◽  
Gas Permeation ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
Cross Sectional ◽  
Feed Pressure ◽  
Bruggeman Model ◽  
The Matrix ◽  
Matrix Membranes

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-sectional image indicated that the silica particles were prolate ellipsoids that were dispersed in the matrix. To investigate the prolate effect, the Maxwell-Wagner-Sillar (MWS) model was employed. The evaluation from cross-sectional image of the membrane structure indicated that the shape factor along z-direction gave a minimum deviation of 17.52%-20.10% at 2-10 bar feed pressure respectively.

scholarly journals Polybenzimidazole-based mixed membranes with exceptionally high water vapor permeability and selectivity

2017 ◽  
Vol 5 (41) ◽  
pp. 21807-21819 ◽  
Author(s):  
F. H. Akhtar ◽  
M. Kumar ◽  
L. F. Villalobos ◽  
H. Vovusha ◽  
R. Shevate ◽  
...  
Keyword(s):  
Water Vapor ◽  
Gas Separation ◽  
Water Vapor Permeability ◽  
High Water ◽  
Mixed Matrix Membranes ◽  
Vapor Permeability ◽  
Mixed Matrix ◽  
Matrix Membranes

Mixed matrix membranes containing polybenzimidazole and titania-based fillers with different morphologies are fabricated and tested for efficient water vapor/gas separation applications.

scholarly journals Antiviral Nanomaterials for Designing Mixed Matrix Membranes

Membranes ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 458
Author(s):  
Abayomi Babatunde Alayande ◽  
Yesol Kang ◽  
Jaewon Jang ◽  
Hobin Jee ◽  
Yong-Gu Lee ◽  
...  
Keyword(s):  
Composite Structures ◽  
Recent Progress ◽  
Membrane Filter ◽  
Mixed Matrix Membranes ◽  
Pathogenic Microorganisms ◽  
Mixed Matrix ◽  
Membrane Filters ◽  
The Matrix ◽  
Pathogenic Viruses ◽  
Antibacterial Nanoparticles

Membranes are helpful tools to prevent airborne and waterborne pathogenic microorganisms, including viruses and bacteria. A membrane filter can physically separate pathogens from air or water. Moreover, incorporating antiviral and antibacterial nanoparticles into the matrix of membrane filters can render composite structures capable of killing pathogenic viruses and bacteria. Such membranes incorporated with antiviral and antibacterial nanoparticles have a great potential for being applied in various application scenarios. Therefore, in this perspective article, we attempt to explore the fundamental mechanisms and recent progress of designing antiviral membrane filters, challenges to be addressed, and outlook.

scholarly journals Effect of Graphene Oxide Synthesis Method on Properties and Performance of Polysulfone-Graphene Oxide Mixed Matrix Membranes

Nanomaterials ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 769 ◽  
Author(s):  
Safae Sali ◽  
Hamish R. Mackey ◽  
Ahmed A. Abdala
Keyword(s):  
Graphene Oxide ◽  
Water Flux ◽  
Synthesis Method ◽  
Composite Membranes ◽  
Mixed Matrix Membranes ◽  
Great Promise ◽  
Mixed Matrix ◽  
Water Emulsion ◽  
The Matrix ◽  
And Performance

Graphene oxide (GO) has shown great promise as a nanofiller to enhance the performance of mixed matrix composite membranes (MMMs) for water treatment applications. However, GO can be prepared by various synthesis routes, leading to different concentrations of the attached oxygen functional groups. In this research, GO produced by the Hummers’, Tour, and Staudenmaier methods were characterized and embedded at various fractions into the matrix of polysulfone (PSf) and used to prepare microfiltration membranes via the phase inversion process. The effects of the GO preparation method and loading on the membrane characteristics, as well as performance for oil removal from an oil-water emulsion, are analyzed. Our results reveal that GO prepared by the Staudenmaier method has a higher concentration of the more polar carbonyl group, increasing the membrane hydrophilicity and porosity compared to GO prepared by the Hummers’ and Tour methods. On the other hand, the Hummers’ and Tour methods produce GO with larger sheet size, and are more effective in enhancing the mechanical properties of the PSf membrane. Finally, all MMMs exhibited improved water flux (up to 2.7 times) and oil rejection, than those for the control PSf sample, with the optimum GO loading ranged between 0.1–0.2 wt%.

scholarly journals Functionalized KIT-6/Polysulfone Mixed Matrix Membranes for Enhanced CO2/CH4 Gas Separation

Polymers ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2312
Author(s):  
Thiam Leng Chew ◽  
Sie Hao Ding ◽  
Pei Ching Oh ◽  
Abdul Latif Ahmad ◽  
Chii-Dong Ho
Keyword(s):  
Gas Separation ◽  
Gas Permeation ◽  
Mixed Matrix Membranes ◽  
Separation Performance ◽  
X Ray Diffraction ◽  
Mixed Matrix ◽  
X Ray ◽  
The Matrix ◽  
Adsorption Desorption ◽  
Matrix Membranes

The development of mixed matrix membranes (MMMs) for effective gas separation has been gaining popularity in recent years. The current study aimed at the fabrication of MMMs incorporated with various loadings (0–4 wt%) of functionalized KIT-6 (NH2KIT-6) [KIT: Korea Advanced Institute of Science and Technology] for enhanced gas permeation and separation performance. NH2KIT-6 was characterized by field emission scanning electron microscope (FESEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR), and N2 adsorption–desorption analysis. The fabricated membranes were subjected to FESEM and FTIR analyses. The effect of NH2KIT-6 loading on the CO2 permeability and ideal CO2/CH4 selectivity of the fabricated membranes were investigated in gas permeation and separation studies. The successfulness of (3-Aminopropyl) triethoxysilane (APTES) functionalization on KIT-6 was confirmed by FTIR analysis. As observed from FESEM images, MMMs with no voids in the matrix were successfully fabricated at a low NH2KIT-6 loading of 0 to 2 wt%. The CO2 permeability and ideal CO2/CH4 selectivity increased when NH2KIT-6 loading was increased from 0 to 2 wt%. However, a further increase in NH2KIT-6 loading beyond 2 wt% led to a drop in ideal CO2/CH4 selectivity. In the current study, a significant increase of about 47% in ideal CO2/CH4 selectivity was achieved by incorporating optimum 2 wt% NH2KIT-6 into the MMMs.

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