Permeation properties
WebAbstract A series of hydroxyl-group containing polyimides (HPIs) were prepared in order to investigate the structure-gas permeation property relationship. Each polymer membrane had structural characteristics that varied according to the dianhydride monomers. Web5. júl 2010 · Abstract. In this work, a new polydimethylsiloxane (PDMS) membrane was synthesized and its sorption, diffusion, and permeation properties were investigated using H2, N2, O2, CH4, CO2, and C3H8 as ...
Permeation properties
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WebAbstract. Modification of the gas permeation properties of ZIF-8 membranes using electron beam irradiation is reported. 3.8 and 3.2 fold enhancements in ideal selectivity for CO 2 /N … WebBarrier and permeation properties or transmission rate measurement for coatings, polymer and plastic materials in industrial or packaging applications. Measurement of barrier or permeation properties of polymers and plastics is essential across a wide range of industries including packaging, medical, cosmetics or food where manufacturers and ...
Web15. mar 2024 · CO 2 permeation properties and stability of ceramic-carbonate dual-phase membranes at high pressures/temperatures are critical to their CO 2 separation and … 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
Web12. mar 2024 · The porous structures of fired gels characterized by N 2 adsorption and PAL measurement showed that the AR = 10 −2 fired gel consisted of a larger number of small pores that had formed during the firing process. Single-gas permeation experiments showed high H 2 permeance (5–9 × 10 −7 mol/ (m 2 Pa s)) and H 2 /CF 4 selectivity (700–20,000). 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, …
WebPermeability Properties of Plastics and Elastomers, Fourth Edition provides a comprehensive collection of graphical multipoint and tabular data covering the …
Web5. máj 2024 · It was found that these HPEIs showed excellent thermal and mechanical properties. All the HPEI precursors underwent thermal conversion in a N 2 atmosphere … topre thailandWeb4. 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 … topre0700wdWeb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 topred mediaWebCommercial metathesis polynorbornene is used for the fabrication of high-damping coatings and bulk materials that dissipate vibration and impact energies. Functionalization of this non-polar polymer can improve its adhesive, gas barrier, and other properties, thereby potentially expanding its application area. With this aim, the post-modification of … topre vs cherryWeb28. feb 2024 · Permeation is the penetration process of a permeant such as a liquid, gas, or vapor through the material membrane of a solid. Permeation comprises three processes: … topre vs cherry brownWebThe breakthrough times and permeation rates of 1,4-dichloro-2-butene, benzene, carbon tetrachloride, and 2-chloro-1,3-butadiene for eleven commercially available gloves were determined. Four methods of determining the breakthrough time and permeation rate were evaluated. A wide variation in the glove material thickness and protection time was found … topread666WebCorneal permeation properties of a charged lipid nanoparticle carrier containing dexamethasone Junfeng Ban, Yan Zhang, Xin Huang, Guanghan Deng, Dongzhi Hou, … topreality kosice