Permeation properties
Web8. feb 2011 · Silica and cobalt-doped silica membranes that showed a high permeance of 1.8 × 10 −7 mol m −2 s −1 Pa −1 and a H 2 /N 2 permeance ratio of ∼730, with excellent hydrothermal stability under steam pressure of 300 kPa, were successfully prepared. The permeation mechanism of gas molecules, focusing particularly on hydrogen and water … Web服务热线： 4008-161-200 800-990-8900. 国家科技图书文献中心. © Copyright(C)2024 NSTL.All Rights Reserved 版权所有
Permeation properties
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Web21. apr 2015 · A series of new organic polyimides were synthesized from 4-fluoro-4'4"-diaminotriphenylmethane and four different aromatic dianhydrides through a one-step, … Web4. máj 2024 · The relationship between activation energy and He/H 2 permeance ratio for SiO 2 and organosilica membranes suggested that the molecular sieving can dominate …
Web5. mar 2009 · The cubic phase stabilization by partial Zr substitution has been shown for 31 and perovskite oxides. 32 Detailed investigation has also been carried out on the oxygen permeation properties of in terms of the amount of oxygen deficiency, microstructure, and membrane thickness. Experimental WebPermeability Properties of Plastics and Elastomers, Fourth Edition provides a comprehensive collection of graphical multipoint and tabular data covering the …
Web8. máj 2024 · Permeability, Physiology, Polymers, Selectivity Abstract Hundreds of polymers have been evaluated as membrane materials for gas separations, but fewer than 10 have made it into current commercial applications, mainly … WebPermeation properties of concrete has attracted much increased attention due to their vital importance to fundamental understanding of deterioration mechanisms in structural …
Web19. okt 2024 · The aim of the study was to determine the antioxidant activity and assess the lipophilicity and skin penetration of eugenyl chloroacetate (EChA), eugenyl dichloroacetate (EDChA), and eugenyl trichloroacetate (ETChA). Identification of the obtained products was based on gas chromatography (GC), infrared spectroscopy (FTIR/ATR), gas …
The process of permeation involves the diffusion of molecules, called the permeant, through a membrane or interface. Permeation works through diffusion; the permeant will move from high concentration to low concentration across the interface. A material can be semipermeable, with the presence of a … Zobraziť viac In physics and engineering, permeation (also called imbuing) is the penetration of a permeate (a fluid such as a liquid, gas, or vapor) through a solid. It is directly related to the concentration gradient of the permeate, a … Zobraziť viac Abbé Jean-Antoine Nollet (physicist, 1700–1770) Nollet tried to seal wine containers with a pig's bladder and stored them under water. After a while the … Zobraziť viac • Moisture vapor transmission rate – Measure of the passage of water vapor through a substance • Oxygen transmission rate – measure of packaging permeability Zobraziť viac • Yam, K. L., Encyclopedia of Packaging Technology, John Wiley & Sons, 2009, ISBN 978-0-470-08704-6 • Massey, L K, Permeability Properties of Plastics and Elastomers, 2003, Andrew Publishing, ISBN 978-1-884207-97-6 Zobraziť viac • Permeant: The substance or species, ion, molecules permeating through the solid. • Semipermeability: Property of a material to be permeable only for some substances and not for others. Zobraziť viac • Packaging: The permeability of the package (materials, seals, closures, etc.) needs to be matched with the sensitivity of the package … Zobraziť viac The permeation of films and membranes can be measured with any gas or liquid. One method uses a central module which is separated by the test film: the testing gas is fed on the one side of the cell and the permeated gas is carried to the detector by a … Zobraziť viac decofurn corner couchesWeb28. aug 2024 · The highest oxygen semi-permeation flux was obtained through the LSF37 membrane with 1.7 × 10 −3 mol/m 2 s at 900 °C. However, the LSF37 or LSF membranes with x > 0.7 show too low mechanical properties for oxygen semi-permeation measurements or for the eventual industrial applications as oxygen transport … federal celsiusmurray theblockWeb18. jan 2024 · Permeation fluxes were measured at transmembrane pressure values of 10, 20, 30, 40 and 50 bars, at a stirrer rotation speed of 60 rpm corresponding to a Reynolds number around 6,300 under 298 K. federal cell phone privacy laws