Syringe filters are one of the most common biological consumables in laboratories. They are widely used in sample prefiltration, clarification, particle removal, and sterile filtration of liquids and gases. Using syringe filters is the preferred method for filtration of samples for HPLC and GC. Membrane Solutions provides syringe filters with different membrane materials to meet needs when filtering different samples and improve the efficiency of your experimental process. This article will take you to understand the syringe filter made of a popular membrane-- PVDF.
Is PVDF Hydrophobic Or Hydrophilic
Polyvinylidene fluoride (PVDF) membrane is available in both hydrophilic and hydrophobic forms. Precisely speaking, PVDF membrane is naturally hydrophobic, but we can make it hydrophilic by hydrophilic treatment to meet different filtration requirements.
Hydrophilic polyvinylidene fluoride (PVDF) membrane has the characteristics of extremely low protein adsorption and high flow rate compared with other membrane materials. It is ideal for chemical solutions filtration with a wide range of chemical compatibility. It is widely applied to sterile filtration of liquids such as protein solutions, tissue culture media, antibiotics and ethanol. Due to these features of hydrophilic PVDF membrane, this material is widely used in syringe filters.
Why Use PVDF Membrane For Syringe Filter
. Broad chemical compatibility
PVDF membrane can filter most chemicals with chemical stability, only a few chemicals such as oleum, strong bases, ketones, ethers can swell or partially dissolve it.
. Hydrophobic and hydrophilic available
PVDF membrane includes hydrophilic PVDF membrane and hydrophobic PVDF membrane. PVDF hydrophilic membrane is more suitable for laboratory sample filtration. Currently, hydrophilic PVDF membrane is mainly used for syringe filters.
. Low protein binding
The protein binding rate of PVDF syringe filter is far lower than that of nitrocellulose, polytetrafluoroethylene and other filter membranes. It is compatible with a variety of organic solvents and available in different applications. It is suitable for sample preparation and solvent filtration for HPLC, GC, etc.
Applications
. Hydrophobic polyvinylidene fluoride membrane is mainly used in gas and steam filtration, high-temperature liquid filtration.
. Hydrophilic polyvinylidene fluoride membrane is mainly used for sterile filtration of tissue culture medium, additives, etc.
. Purification and filtration of solvents and chemical raw materials, aseptic treatment of reagents, filtration of high-temperature liquids, etc.