Nanoscale double-cylindrical-bore filter membrane

Abstract

The present invention provides a nano-scale double cylindrical hole filter membrane, in which two connected cylindrical holes are opened on both sides of a layer of solid material, wherein the cylindrical hole with smaller pore diameter is a filter hole, and the length of the filter hole is 10, The value of l0 is determined according to the strength requirements of the filter hole. The diameter of the filter hole is 2R0, and the radius of the filter hole is R0. The length of the hole is l1, the value of l1 is determined according to the mechanical strength requirements of the filter membrane, the radius of the drag reduction hole is R1, where R1≥R0, and the radius R1 is determined according to the maximum permeability requirement of the filter membrane; the cylindrical hole is on the surface of the solid material Evenly distributed, the layer of solid material is the filter membrane; the filter membrane of the present invention can not only realize ultra-fine filtration, but also has excellent penetration ability, and can meet the mechanical strength requirements during filtration at the same time.

Description

technical field [0001] The invention relates to a nano-scale double cylindrical hole filter membrane. Background technique [0002] Membrane for filtration, referred to as filter membrane, has important applications in industry and daily life. It can be used to filter out solid particles and impurities, purify liquids, and also to filter out bacteria and macromolecules, or to realize the separation of two liquids. separate. In daily life, filter membranes can be used to purify drinking water and various beverages, and can also be used to filter out impurities and various ions in seawater to achieve seawater purification. The existing commonly used filtering methods and means are: [0003] 1. Activated carbon filtration [0004] Activated carbon is an industrial adsorbent with a wide range of uses. It uses charcoal, various fruit shells and high-quality coal as raw materials, and crushes, sieves, activates catalysts, rinses, dries and screens raw materials through physical...

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Problems solved by technology

[0016] The purpose of the present invention is to provide a nano-scale double-cylindrical pore filter membrane to solve the problems in the prior art that the filter pore diameter is too large to be used for filtering very small substances, or the filter pore diameter is too small, the permeability is poor, and the filtration efficiency Relatively low, and the mechanical strength of the filter membrane caused by too thin filter membrane is often challenged, not resistant to high pressure, high temperature and other problems

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