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Showing 1 to 20 of 38 for “"Polymeric membranes"”.
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Microporous polymeric membranes via melt processing
Novel ultraporous and microporous membranes from immiscible polymer blends were produced via melt processing and post-extrusion treatments. Polystyrene (PS)/polypropylene (PP) and poly(ethylene terephthalate) (PET)/polypropylene (PP) blend systems with different rheological properties were studied. …
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Characterization of polymeric membranes: sulfonated polysulfones
… membrane. In this work, an extensive of dense membranes made from sulfonated polysulfone having 0.2, 0.4, 0.5, 0.6, 0.8, and 1.0 degree of sulfonation is described. The degree of sulfonation (D.S.) was maintained during the membrane fabrication process as evidenced by IR analysis. The effect of …
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Mixed Gas Transport Study Through Polymeric Membranes: A Novel Technique
… effective during mixed gas permeation through membranes have been restricted due to experimental limitations. Also, the absence of rigorous theoretical models hinders the complete understanding of the transport phenomena. The current research involved design and development of an experimental …
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Application Of Composite Polymeric Membranes For Efficient Regeneration Of Physical Solvents
… of this work is to evaluate the use of composite polymeric membranes for the recovery of CO2 from CO2-rich solvent streams. To achieve this purpose, an experimental bench-scale setup was built to investigate and quantify CO2 removal capacity from the rich solvent across different types of …
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Advanced Polymeric Membranes and Multi-Layered Films for Gas Separation and Capacitors
… increase performance with focus on materials for polymeric capacitors and gas separation membranes. There is a need for polymeric capacitors with improved energy storage density and thermal stability. In this work, the affect of polymer molecular structure and symmetry on Tg, breakdown strength, …
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Screening of Polymeric Membranes and Optimization of Operating Conditions for the Treatment of Produced Water
… upon application of an external pressure. Polymeric membranes have significant advantages such as low cost and ease of fabrication, but also major disadvantage such as fouling which directly affects the operating cost. Microfiltration (MF), ultrafiltration (UF), nanofiltration (NF) and …
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Use of polymeric membranes for the treatment of oily wastewater: Modification using inorganic nanoparticles and optimization of filtration parameters
Polymeric membranes have proven to be an effective method for the treatment of contaminated waters. Many factors influence their performances including the operating parameters, fabrication process and conditions, and modifications using different additives. Introduced as additives, nanoparticles …
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Melt Processable Poly(acrylonitrile)-based Precursors for Carbon Fiber Production and Advanced Polymeric Membranes for Gas Separation and Water Electrolysis Applications
… greater than 1 hour. The modification of membranes to improve gas separation properties is of considerable interest. Crosslinking is one route to modify membranes, but the resulting effects on thin membranes have yet to be investigated to understand the impact of such modification at …
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Porous Graded Materials Derived From Block Copolymer Self-Assembly For Water And Energy Applications
… It has been utilized to make ultrafiltration membranes for water treatment and selective separation. In the first part, further development on SNIPS polymeric membranes is discussed. In situ grazing incidence small-angle X-ray scattering (GISAXS) was employed to study the structure evolution …
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Comparison of conventional and super-glassy polymers
In the field of gas separation, polymeric membranes are favorable materials. Polymers are inexpensive compared to ceramics and metals, offer a good processability, and possess the ability to operate at large scale. The most important fact about polymeric membranes is their good selectivity. …
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ADVANCED POROUS MATERIALS IN MIXED MATRIX MEMBRANES FOR CARBON DIOXIDE CAPTURE
… and flue gas (CO2/N2 separation). Mixed matrix membranes (MMMs) offer new opportunities to achieve breakthroughs in fabricating high-performance membranes for CO2 capture. In this thesis, several advanced porous materials, including two dimensional metal-organic framework (MOF) nanosheets, …
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Scalable Synthesis and Separation Performance of Covalent Organic Framework and Contorted Polyamide Membranes
… pharmaceuticals and colorants using nanoporous membranes. Reverse osmosis (RO) separates smaller constituents like ions and sugars from solvents using non-porous dense polymeric membranes. Both NF and RO membranes are commonly thin film composites (TFC) made via interfacial polymerization. …
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Scalable Synthesis and Separation Performance of Covalent Organic Framework and Contorted Polyamide Membranes
… pharmaceuticals and colorants using nanoporous membranes. Reverse osmosis (RO) separates smaller constituents like ions and sugars from solvents using non-porous dense polymeric membranes. Both NF and RO membranes are commonly thin film composites (TFC) made via interfacial polymerization. …
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Evaluation wastewater treatment technologies at Ford Powertrain
… types of membrane technologies were tested: polymeric, ceramic, and sintered stainless steel. In regards to FOG, the membrane technologies and the clay media were able to reduce FOG levels below the EPA proposal of 17 mg/L. However, the clay media did not show a strong affinity for metal …
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Simulations of polymeric membrane formation in 2D and 3D
… precipitation process makes most commercial polymeric membranes, which enjoy widespread use in water filtration and purification. In this work, a ternary Cahn-Hilliard formulation incorporating a Flory-Huggins homogeneous free energy function is used to model both initial diffusion and the …
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High Permeability/High Diffusivity Mixed Matrix Membranes For Gas Separations
… commercial gas separation membrane systems are polymeric because of processing feasibility and cost. However, polymeric membranes designed for gas separations have been known to have a trade-off between permeability and selectivity as shown in Robeson's upper bound curves. The search for …
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Fatores críticos na emulsificação por membranas : caracterização e avaliação do processo
… involved in membrane emulsification (ME) using polymeric membranes was carried out. Two different techniques were applied (direct and premix ME with repetitive cycles) in order to obtain oil in water emulsions (O/W) using sunflower oil and lemon essential oil as a dispersed phase. Different flat …
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Simulation and optimization of hot syngas separation processes in integrated gasification combined cycle
… In particular, we evaluate the use of membranes and sorbents for CO2 separation and capture from hot syngas in IGCC, as a substitute to solutionbased absorption processes. We present a multi-stage model for CO2 separation from multi-component gas mixtures using polymeric membranes based …
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Caratterizzazione di membrane da nanofiltrazione
… and ultrafiltration. Commercially available polymeric membranes have been used in a wide range of applications, such as drinking, process industry and waste water treatment. For all the applications requiring high stability and harsh washing procedures inorganic membranes are preferred due to …
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