Novel nuclear pore membrane

Abstract

The invention relates to a novel nuclear pore membrane (or nuclear track membrane), generally the nuclear track always has conicity after etching, the millipore of the nuclear pore membrane is single-cone or double-cone, the center aperture of the millipore of the double cone is less than the aperture on both surfaces of the membrane. Particles are blocked in the millipore easily when filtering, and the membrane is blocked easily. Meanwhile, the ions with lower mass number are utilized for irradiating the electrolyte membranes, for the nuclear track etching sensitivity is lower, conicity is larger, the nuclear pore membrane with small aperture is made hard. The center aperture of the millipore of the nuclear pore membrane made by the invention is larger than the diameters of both surfaces of the membrane or is of column form capillary tube shape. The shape of the millipore causes the particles larger than the membrane surface aperture to be trapped on the membrane surface, and the nuclear pore membrane is not blocked easily. Meanwhile, a new method is provided for making nuclear pore membranes by utilizing the ions with lower mass number.

Description

technical field [0001] The invention relates to a filter membrane, in particular to a nuclear pore membrane, or nuclear track membrane. Background technique [0002] In the 1950s, nuclear tracks were discovered. In the 1960s, the United States carried out a lot of research and reports. In the 1970s, the United States first used reactors for commercial production of nuclear pore membranes. Then Russia, Germany and France used heavy ion accelerators for production. The micropores of nuclear pore membranes are generally double cones, that is, in the micropores, the middle pore size is smaller than the pore size on both surfaces of the membrane, as shown in Figure 1, so that when filtering Particles are easily stuck in the micropores, and the filter membrane is easily blocked. [0003] At present, nuclear pore membranes are produced by irradiating electrolyte membranes with fission fragments produced by neutron bombardment of uranium or heavy ion beams with high mass numbers pr...

AI Technical Summary

Problems solved by technology

Then Russia, Germany and France used heavy ion accelerators for production. The micropores of nuclear pore membranes are generally double cones, that is, in the micropores, the middle pore size is smaller than the pore size on both surfaces of the membrane, as shown in Figure 1, so that when filtering Particles are easy to get stuck in the micropores, and the filter membrane is easy to clog

[0003] At present, nuclear pore membranes are produced by irradiating electrolyte membranes with fission fragments produced by neutron bombardment of uranium or heavy ion beams with high mass numbers produced by accelerators, while ion beams with low mass numbers have low sensitivity due to nuclear track etching. The cone angle of the micropore is relatively large, making it difficult to manufacture a nuclear pore membrane with a small pore size

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