Gas Filtration Particle Filtration The dramatic rise in the use of all types of high-purity gases has been driven by the process requirements for advanced device manufacturing. In order to achieve and maintain the high purities required of these gases, the selection of
Search results for ptfe sterile filters at Sigma-Aldrich SAMP2LCRB This 33 mm syringe filter with a Hydrophilic PTFE membrane, for non-sterile filtration on the Samplicity G2 system, has a 0.45 µm pore size used in preparation of aqueous & organic solutions prior
The permeability and solubility of gases and liquids in a polymer can be very different for different polymers and permeants. In general, permeability and solubility at a given temperature depend on the degree of crystallinity (morphology), the molecular weight, the
2019/10/4 · A fuel cell is an electrochemical device that converts hydrogen to electricity (and heat energy) by means of interaction with a catalyst and oxygen. Water is the only by-product, making fuel cells not only efficient, but environmentally friendly as well.
Jagoda M. Urban-Klaehn, in Membrane Science and Technology, 2011 Permeability Gas Testing Pure gas permeability results were obtained using the pressure-rise time-lag method [17–20]. Membranes were exposed to individual gases, like H 2, CH 4, and CO
FEP polymers are fully fluorinated and melt processible. They have chemical resistance comparable to polytetrafluoroethylene (PTFE). Melt viscosity of FEP is over one million times lower than PTFE. Fluorinated ethylene propylene resins are in general copolymers of tetrafluoroethylene with hexafluoropropylene and possibly one or more other comonomers.
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Hydrophobic membrane filters are necessary for applications where the membrane is used to retain liquid water while allowing gases to pass through. Hydrophobic PCTE membranes typically have insufficient water entry pressures for these applications and will allow liquid water to pass at pressures lower than required.
microporous membrane was used to protect the gel layer in gas permeation experiment [1, 2, 10]. The high porosity hydrophobic polytetrafluoroethylene (PTFE) and polyvinylidene fluoride (PVDF) polymers were selected for the support of ILs [11].
