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Showing 1 to 20 of 20 for “"polyethersulfone"”.
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Surface characterization of plasma treated carbon fibers and adhesion to polyethersulfone
… carbon fibers. The adhesion of carbon fibers to polyethersulfone (PES) was measured by using the microbond pull-out test, and compared to the adhesion of the same fibers to an epoxy resin. The load required to debond the microdroplet was used as a measure of the bond strength. The data were also …
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Effects of Background Ions on Polyethersulfone (Pes) Membrane Fouling by Natural Organic Matter (Nom)
"Hence, NOM aggregation was experimentally evaluated by dynamic light scattering measurements with SRNOM. These tests showed that calcium caused formation of supramolecular NOM clusters. Large-scale MD simulations with multiple NOM molecules were then performed to probe possible formation of …
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The biogeochemistry of marine particulate trace metals
… that analyzed filtered particles on shared polyethersulfone filters. We use inter-lab and intra-lab total elemental recoveries of these particles to determine our state of our intercalibration (</= 21% one-sigma inter-lab uncertainty for most elements; 9% intra-lab) and to identify means of …
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Occurrence and fate of endocrine disrupting chemicals and other hydrophobic organic compounds in a tropical river in Kenya
… to risk assessment. Two passive samplers, namely polyethersulfone (PES) and silicone rubber (SR), were used to monitor some endocrine disruptors (EDCs) and hydrophobic organic chemicals (HOCs) in freshwater and sediments of a tropical river in Kenya. PES was applied for the first time for …
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The biogeochemistry of marine particulate trace metals
… present a new chemical method for dissolution of polyethersulfone filters and compare it to other total particle digestion procedures. I then present the marine particulate distributions of the lithogenic elements Al, Fe, and Ti in the North Atlantic GEOTRACES section. A one-dimensional multi-box …
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Fabrication of Zeolite MFI Membranes on Low Cost Polymer Supports
… then applied to MFI membranes supported on mesh-polyethersulfone (PES) supports and MFI membranes supported on mesh-polybenzimidazole supports. However, cracks formed after the treatments due to the damage of polymer layer by UV light and the mismatch of linear thermal expansion co-efficient, …
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The design of a microfabricated air electrode for liquid electrolyte fuel cells
… by polytetrafluoroethylene (PTFE) fibrils or by polyethersulfone (PES), which is a soluble polymer in common solvents. Experiments and modeling have indicated that these materials will allow the microfabricated catalyst layer to have an effective ionic conductivity that is 4 to 5 times greater …
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Role of metal alkoxides as primers in polymer/metal adhesion
… alkoxide solutions and then bonded with both polyethersulfone (thermoplastic) and FM 300U, a structural epoxy (thermoset). Bond durabilities were studied using wedge specimens. The two aluminum alkoxide primed steel surfaces generally showed slower crack propagation than titanium and silicon …
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Study on the gas performance of ceramic membrane from kaolin prepared by phase inversion technique
… N-methyl-2-pyrollidone (NMP) as solvent and polyethersulfone (PESf) as binder. Phase inversion tchnique conducted by casted the suspension on the glass plate with casting knife. In order to achieve the aims of this study, the development of ceramic membrane from kaolin were conducted into two …
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Study on the gas performance of ceramic membrane from kaolin prepared by phase inversion technique
… N-methyl-2-pyrollidone (NMP) as solvent and polyethersulfone (PESf) as binder. Phase inversion tchnique conducted by casted the suspension on the glass plate with casting knife. In order to achieve the aims of this study, the development of ceramic membrane from kaolin were conducted into two …
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Development of an automated plasmapheresis system for the treatment of sepsis
… able to separate the plasma from the blood. The polyethersulfone membrane that has higher effective pore size had higher filtration rate. By increasing the size of the rig, the filtration volume increased. Also, the methods used to increase the flux were able to improve the flux rate. The …
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Ageing under extreme ph conditions, modification and characterization of ultrafiltration and nanofiltration membranes
… experimental work is devoted to the ageing of polyethersulfone UF and polyamide NF membranes under long-term exposures to acidic and alkaline conditions. Six commercial UF membranes from Nadir, Koch and GE Osmonics manufacturers and two NF ones from Dow Filmtec were subjected to different …
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Layer by Layer, Nano-particle "Only" Surface Modification of Filtration Membranes
… including polycarbonate track etched (PCTE), polyethersulfone (PES) and sulfonated PES (SPEES) MF/UF membranes. Both spherical (cationic/anionic) and eccentric elongated (anionic) silica nanoparticles are deposited using conditions similar to those reported by Lee et al.1 Appropriate selection …
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Separation of liquid mixtures by membranes.
… modifying macromolecule (SMM) was added into a polyethersulfone (PES) membrane casting solution. Because of its lower surface energy, SMM is expected to move up to the top surface of the membrane. The resulting membrane is to have a layer of SMM at the top surface and a PES rich bulk substrate …
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Solvent resistant microporous/nanoporous polymeric hollow fiber and flat film membranes and their applications
… porous polymeric supports (Polypropylene (PP), Polyethersulfone (PES) and Nylon) suitable for the required solvent-stable applications were chosen first and then the supports were modified to satisfy the requirements for the applications. Membrane modification techniques employed were …
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Structure/Property/Processing Relationships in Poss-Modified High Temperature Thermoplastic Composites
<p>Cost effective and lightweight fiber-reinforced polymers provide promising alternatives to metal alloys in both the aerospace and automotive industry and have been used in such areas since the 1980s. The majority of these polymer composites are fabricated using thermosetting epoxides due to the …
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Development and physicochemical characterization of thin-film composite nanofiltration membranes with covalent organic framework active layers
… tris(4-aminophenyl)benzene monomers on top of a polyethersulfone (PES) ultrafiltration membrane support. Rutherford backscattering spectrometry and Fourier transform infrared spectroscopy analyses confirmed the presence of an imine-linked film that was reproducibly formed with a thickness of ~10 …
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Engineering nanostructured selective layers for reverse osmosis membranes
… (PSU) mats of varying fiber diameter and polyethersulfone (PES) ultrafiltration (UF) membranes with varying pore diameters were examined. Second, a range of materials were investigated for the spray-LbL deposition of clay composite films. Laponite clay platelets were incorporated into …
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Vertically-aligned carbon nanotube membranes for water desalination and ultrafiltration
… LMH was around 30 times higher than traditional Polyethersulfone (PES) membrane. The salt rejection was initially 99% but later on it was reduced and stabilized at 96% due to concentration polarization in used setup of modified dead-end filtration cell. Experimental results confirmed that the …
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Using Polar Organic Chemical Integrated Sampler (POCIS) to monitor pesticide fluxes in Alpine streams
… sheets, like an Oasis HLB phase and by two polyethersulfone (PES) membranes as used in the present work. The sampler adsorbs pesticides flowing in the stream during its deployment period of time in stream water, which are then extracted with a solvent and analysed by gas chromatography …