A hydrophobic membrane, such as polytetrafluoroethylene (PTFE) will resist any aqueous sample, creating back pressure. Although it is sometimes possible to overcome this back pressure with additional force, there is a risk of membrane rupture and incomplete filtration. Should there be no alternative, pre-wetting the membrane with an alcohol can
Dec 21, 2010 · In this study, a detailed modeling of the heat and mass transfer processes inside a plate-and-frame absorber with hydrophobic microporous membrane contactor at aqueous solution-water vapor interface as a part of a chiller model is developed. The absorber is a component of a 5 kW cooling capacity single effect lithium bromide-water absorption chiller with a hot water thermally driven generator
Hydrophobic membrane filters are typically used with compatible non-aqueous fluids. They are also commonly used as air, gas, or vent filters. Hydrophobic membrane filters are sometimes used with water or aqueous solutions; and, in these applications, they must first be prewet with a low surface tension, water miscible fluid prior to use.
While the insertion of a hydrophobic peptide or membrane protein segment into the bilayer can be spontaneous and driven mainly by the hydrophobic effect, anionic lipids, which comprise ca. 20% of
GH Polypro (GHP) Membrane Disc Filters All purpose, universal membrane with maximum chemical compatibility for both aqueous solutions and aggressive solvents Specifications Filter Media Hydrophilic polypropylene Pore Size 0.2 and 0.45 µm Typical Thickness 0.2 µm: 101 µm (4.0 mils) 0.45 µm: 114 µm (4.5 mils) Typical Water Flow Rate mL/min
Hydrophilic Filters Possess an affinity for water Can be pre-wet with virtually any liquid Are preferred for aqueous solutions Hydrophobic Filters Will not allow passage of water Will wet in low surface tension liquids such as organic solvents Hydrophilic FiltersPossess an affinity for water Can be pre-wet with virtually any liquid Are
Jan 01, 2020 · There are many available methods to hydrophilize the surfaces of hydrophobic membranes, such as UV, plasma, or ozone-induced grafting polymerization and chemical treatment [, , , , , , , ]. For example, PPMMs were hydrophilized by UV-induced grafting or oxidation with chromic acid solution and then they were used as substrates for NFMs [ 23
The second model, consisting of fixed negative sites in an aqueous channel surrounded by a medium of low dielectric constant, explains many properties of the cellulose acetate-nitrate hydrophobic membranes and was analyzed in some detail. Organic cations can enter the membranes through the hydrophobic phase as well as through the aqueous channels.
Membrane Type (PTFE, GHP, PVDF, Nylon) — Typically, the first step in selecting a suitable filter is to choose a membrane that is chemically compatible with the sample (see chart opposite). For aqueous samples, it is preferable to use a hydrophilic membrane (GHP, PVDF or Nylon) versus a hydrophobic membrane (PTFE).
Hydrophobic Membrane Filters | Products & Suppliers . Description: , Nylon) — Typically, the first step in selecting a suitable filter is to choose a membrane that is chemically compatible with the sample (see chart opposite). For aqueous samples, it is preferable to use a hydrophilic membrane (GHP, PVDF or Nylon) versus a hydrophobic.
Pall GH Polypro (GHP) Membrane Disc Filters, Pall Filters. All-purpose Pall Polypro Membrane Disc Filters, universal hydrophilic polypropylene membrane with maximum chemical compatibility when filtering both aqueous solutions and aggressive solvents. Pall Polypro Membrane Disc Filters low protein binding of GH Polypro membrane provides high
GH Polypro (GHP) Membrane Disc Filters, Pall® Life Sciences All-purpose, universal hydrophilic polypropylene membrane with maximum chemical compatibility when filtering both aqueous solutions and aggressive solvents.
Feb 22, 2022 · The GHP membrane used on Acrodisc, Minispike Syringe Filter, GHP is a hydrophilic propylene membrane suitable for aqueous, and is organic and has minimal protein building. GHP membranes also offer the widest range of chemical compatibility. The 13 mm Minispike filter has a pore size of 0.2 µm and a sample volume below 10 mL.
Nov 08, 2018 · While hydrophobic membrane filters are ideal for air and gas filtration, they are not suitable for filtering aqueous solutions. Hydrophilic membrane filters, on the other hand, are commonly used for clarification and sterilization of water-based fluids but are not typically used for venting applications.
Product description. "These syringe filters offer a choice of filter media: hydrophobic PTFE membrane for exceptional chemical and temperature compatibility -hydrophilic nylon membrane for excellent chemical compatibility with esters, bases, and alcohols, without prewetting -GHP (hydrophilic polypropylene) membrane for low protein binding -and hydrophilic PVDF (polyvinylidine fluoride) membrane for use in aqueous and nonaggressive, solvent-based mobile phases.