As we all know, polyethersulfone filter membrane (PES membrane) is made of polyethersulfone microfiber hot-melt bonding. It is a membrane material for depth filtration and often for various tests. Here is a brief introduction:

What is the pes filter membrane:

PES filter membrane disc PES filter membrane

  • The hydrophilic PES filter membrane is made of unsupported pure polyethersulfone, which has good mechanical strength, thermal stability, and broad chemical compatibility.
  • It is suitable for sterile filtration of biological products such as pure water filtration, medium filtration, buffer filtration, fermentation broth filtration, etc.

Features of pes filter membranes:

  • A variety of apertures with low biosorption and high flow rates
  • It has excellent high-temperature resistance and broad chemical compatibility.
  • Low protein adsorption ensures maximum recovery of the active ingredient of interest.
  • And the membrane filter has a gradient pore structure and can be for as a pre-filter. The filter element has a large flow rate, small pressure difference, and long service life.
  • And with a high separation process, which is a passive transfer process. Fluid passes through the membrane under the action of a pressure gradient.
  • Actually, separated the particulate impurities quickly and often in fluids by the following four modes of action, namely sieving, bridging, adsorption, and ion attraction.
  • It has the characteristics of a high flow rate, low extractability, and good strength. Does not adsorb proteins, and does not extract and contaminate samples.
  • In addition, produced by a unique process, it has a super-asymmetric membrane pore structure and has a higher water flux than other membranes under the same pore size.
  • The low protein adsorption properties of PES membranes make them ideal for biological sample preparation.
  • And with high strength, high flow rate, low extractable, low protein adsorption


  • Low protein adsorption and high drug compatibility, specially designed for biochemical, testing, pharmaceutical, and sterile filtration equipment.
  • Used for routine filtration sterilization, filtration intravenous, biopharmaceutical bacteria isolation
  • For sterilization and filtration of enzymes and proteins
  • And for biological fluid blood sample extraction and tissue culture
  • Biological and clinical analysis of  drug filtration and sterilization
  • PES membrane has extremely low protein adsorption capacity and is widely for filtration and clarification in food, medicine, and other fields.

Some problems about using pes filter membrane:

Scanning Electron Microscope Picture of PES Membrane Filter

  1. Is the polyethersulfone filter membrane head organic or water-based?
  • The polyethersulfone filter membrane head is organic.
  • And polyethersulfone resin (PES) is a thermoplastic polymer material with excellent comprehensive properties developed in 1972. It is one of the few special engineering plastics at present.
  • With excellent heat resistance, high mechanical properties and insulation properties, etc.
  • And especially has outstanding advantages such as continuous use at high temperatures and stable performance in environments with rapid temperature changes, and has been widely used in many fields.
  • Polyethersulfone (PES) microporous membranes are naturally hydrophilic. Different from other membrane varieties, the PES membrane with excellent water wettability, so the PES membrane is good in higher water flux.
  1. Is the pes membrane an organic phase or an aqueous phase?
  • The aqueous phase, but can also tolerate some organic solvents, such as ethanol, etc.
  1. The purpose and use of the ion chromatography pes filter head?
  • It is placed at the tip of the syringe to allow the sample to pass through the filter membrane.
  • And the main function is to purify the sample and protect the chromatographic column and mainly to filter and protect the loss of the column to prevent pollution