This kind of membrane uses thermal neutrons in nuclear reactor to fission uranium -235, and the fragments produced by fission penetrate the organic polymer plastic film, leaving a narrow irradiation damage channel on the path where the fission fragments pass. After the channel is oxidized, it can be etched with appropriate chemical reagents to make the channel on the film become cylindrical micropores. By controlling the irradiation and etching conditions of nuclear reactor, nuclear pore films with different pore densities and diameters can be obtained.
Except for the nuclear pore membrane, the microporous structure of microporous membrane is a sponge maze structure, and the filtration mechanism is "deep filtration". Nuclear pore membrane has high mechanical strength and good flexibility, and can withstand repeated washing, so it can be reused many times.
Nuclear pore membrane is widely used in electronics, food, chemistry, pharmacy and other industries, biology, medicine, environmental science, analysis and testing. In the electronic industry, it can be used to prepare ultra-pure water, photoresist and purify process and environmental gas, which can obviously improve the quality and yield of electronic products. In pharmaceutical industry, it can be used to remove particles and bacteria in various injections. In food, yeast, bacteria and other residues in wine, beer, other low-alcohol wines and various beverages can be removed, the clarity can be improved, and cold disinfection can be carried out, so that it can be preserved for a long time without losing its flavor, and at the same time, the energy consumption in the production process can be reduced, and it can also be used to provide sterile gas for fermentation tanks. In chemical industry, it can be used to prepare ultra-pure reagents and recover valuable suspended solids and catalysts from solvents. In environmental engineering, it can be used to sample air and water, and determine the content, particle size distribution and composition of particles and microorganisms. In bioengineering, it can be used for the separation and purification of microorganisms and immune metabolism. In ultra-low temperature engineering, the sprayed metal core hole film can be used as ultra-low temperature thermal insulation material. In medicine, it can be used to detect cancer cells in blood, determine the deformability of red blood cells in blood and filter blood.
With the development of science and technology, nuclear pore membrane will be widely used, and its importance in national economy will become increasingly prominent.