The membrane filter is a filter made of a membrane having a certain pore size (a polymer is used as a material such as a cellulose acetate membrane and a nylon membrane). The pores on the surface are irregular shapes. The core component of the membrane filter is a membrane, a membrane that is filled with finer pores on a microporous support layer. There are many materials for making membranes, which are classified into organic membranes (such as polysulfone hollow fiber membranes) and inorganic membranes.
Membrane filters can be used to filter bacteria or collect microorganisms, sediments, and macromolecules from solvents. Because of the mild operating conditions, the membrane filter is preferred in industrial applications.
1.Nylon filter membrane
Features: Good temperature resistance, can withstand 121℃ saturated steam autoclaving for 30min, with a maximum working temperature of 60℃and good chemical stability, which can withstand a variety of organic and inorganic compounds such as dilute acids, bases, alcohols, esters, oils, hydrocarbons, halogenated hydrocarbons, and organic oxides.
Features: Good temperature resistance, can withstand 121℃ saturated steam autoclaving for 30min, with a maximum working temperature of 60℃and good chemical stability, which can withstand a variety of organic and inorganic compounds such as dilute acids, bases, alcohols, esters, oils, hydrocarbons, halogenated hydrocarbons, and organic oxides.
Uses: water filtration, tissue culture media filtration in electronics, microelectronics, semiconductor industry. Filtration of liquid chemicals, beverages, highly purified chemicals, aqueous solution, and organic mobile phase.
2.PVDF filter membrane
Features: high mechanical strength, high tensile strength, good heat resistance and chemical stability, and low protein adsorption rate; it has strong negative static and hydrophobic properties; it has both hydrophobic and hydrophilic forms. But it cannot tolerate acetone, DMSO, THF, DMF, dichloromethane, chloroform, etc.
Features: high mechanical strength, high tensile strength, good heat resistance and chemical stability, and low protein adsorption rate; it has strong negative static and hydrophobic properties; it has both hydrophobic and hydrophilic forms. But it cannot tolerate acetone, DMSO, THF, DMF, dichloromethane, chloroform, etc.
Uses: Hydrophobic ones are mainly used for air and steam filtration and high-temperature liquid filtration; hydrophilic ones are mainly used for the purification and filtration of sterilization filtration solvents and chemical raw materials such as tissue culture media and additives, aseptic treatment of reagents, and filtration of high-temperature liquids.
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