Characteristics Of Several Common Filter Membranes
The microporous filter membrane uses polymer chemical materials, and the pore-forming additives are coated on the support layer after special treatment. It is mainly made of refined nitrocellulose, adding an appropriate amount of cellulose acetate, acetone, n-butanol, ethanol, etc., which is hydrophilic, non-toxic and hygienic.
It is a porous membrane filter material with a relatively uniform pore size distribution, and pore sizes with microporosity up to 80 ‰. It is mainly used for filtration of aqueous solutions, so it is also called an aqueous membrane. Microporous membranes are easy to use and are widely used in many fields such as scientific research, food testing, chemical industry, nanotechnology, energy, and environmental protection.
Features: Good high-temperature resistance, which can withstand 121°saturated steam autoclaving for 30 minutes, the maximum working temperature of 60 degrees Celsius; Good chemical stability, which can withstand a variety of organic and inorganic compounds such as dilute acids, alcohols, esters, oils, hydrocarbons, halogenated hydrocarbons, and organic oxides.
Uses: electronics, microelectronics, semiconductor industry water filtration, tissue culture media filtration, drug filtration, beverage filtration, high-purity chemical product filtration, aqueous solution, and organic mobile phase filtration.
Features: uniform pore size, high porosity, no medium shedding, thin texture, small resistance, fast flow rate, low cost, but not resistant to organic solutions and strong acid and alkali solutions.
Uses: Sterilize heat-sensitive drugs; Analysis and determination of particulates and oil insoluble in solution, and determination of water pollution index; also used in scientific research departments such as somatic cell hybridization and mitochondrial complementary predictive hybridization.