Microporous Membrane Filter, 0.1-75 µm (CAT#: STEM-BC-2832-ZJF)

This microporous membrane is a thin precision filtration material with a uniform network of through-pores. Its smooth and compact structure provides high porosity while limiting media shedding. Separation occurs by size exclusion as a pressure difference drives the feed liquid through the membrane. Larger particles, microorganisms, and selected bacteria are retained while solvents and smaller dissolved substances pass through. Available materials include polypropylene, polyethersulfone, polyvinylidene fluoride, polytetrafluoroethylene, nylon, and mixed cellulose-based media. Material selection allows the membrane to be matched to aqueous solutions, organic solvents, acids, alkalis, and low-protein-binding applications. The thin membrane structure provides low flow resistance and rapid filtration. It can be used in laboratories, food testing, chemical processing, nanomaterial preparation, water treatment, and environmental monitoring. Correct orientation, conditioning, and storage help maintain filtration performance during use.

Pore-size range: 0.1 to 75 µm
Membrane thickness: 120 to 150 µm
Structure: Uniform porous sponge-like membrane
Separation principle: Pressure-driven size exclusion
Available materials: Polypropylene, polyethersulfone, polyvinylidene fluoride, polytetrafluoroethylene, nylon, and mixed cellulose fiber
Polypropylene membrane properties: Hydrophilic, organic-solvent resistant, and low protein adsorption
Polyethersulfone membrane properties: Compatible with aqueous solutions and multiple organic solvents
Polyvinylidene fluoride membrane properties: Hydrophobic, low protein adsorption, and resistant to many organic solvents except specified halogenated hydrocarbons
Polytetrafluoroethylene membrane properties: Hydrophobic and resistant to solvents, acids, and alkalis
Nylon membrane properties: Suitable for aqueous and multiple organic solutions and capable of sterilization
Recommended preconditioning: Soaking in suitable water at approximately 70°C before use

Uniform pore-size distribution
High membrane porosity
Low filtration resistance
Rapid filtration rate
Minimal media shedding
Multiple membrane-material options
Size-exclusion separation
Broad laboratory and industrial applicability

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