Novel filter membrane comprising tree-shaped nanoscale cylindrical holes with branch hole number of 24

Abstract

The invention relates to a novel filter membrane comprising tree-shaped nanoscale cylindrical holes with the branch hole number of 24. A plurality of uniformly distributed tree-shaped cylindrical through holes are formed in a thin solid material (1); each tree-shaped through hole comprises a main hole (2) and 24 smaller branch holes with the same diameters and lengths; the 24 branch holes are parallel to the main hole (2) and completely communicated with the main hole; the surface material of the main hole is the same as those of the 24 branch holes; the branch holes are filter holes, the diameters of which are nanoscale and the lengths of the branch holes are determined according to a requirement on the strength of the filter holes; the radius of the main hole (2) is proper when the permeability of the filter membrane is maximized, and the thickness of the solid material (1) is determined by a requirement on the mechanical strength; the solid material (1) is the filter membrane. The filter membrane has relatively good performance in the filtration capacity, the permeability and the mechanical strength, and has an important application value in ultrafine filtration of water, bloodand the like.

Description

technical field [0001] The invention relates to the field of filter membranes, in particular to a novel tree-shaped nanoscale cylindrical pore filter membrane with 24 branch holes. 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...

AI Technical Summary

Problems solved by technology

Disadvantages: Activated carbon has large pores, it is difficult to achieve fine filtration, and it cannot filter out micron and nanoscale substances, and is often used for coarse filtration

[0009] Disadvantages of microporous membrane filtration: Compared with nanoporous membranes, the diameter of the filtration holes on microporous membranes is still too large. Although it can meet many fine filtration requirements in daily industry and life, it cannot be used to filter extremely small substances. Such as blood purification, virus separation in protein, ion filtration in liquid, super purification of water, etc.

[0012] Similar to microporous membrane filtration, the disadvantage of filter bag filtration is that the diameter of the filter holes on the filter bag is still too large. Although it can meet many fine filtration requirements in daily industry and life, it cannot be used to filter extremely small substances such as blood. Purification, virus separation in protein, ion filtration in liquid, super purification of water, etc.

[0015] Although the filtration capacity of the nanoporous membrane is strong, due to the extremely small filter pores, the permeability of this membrane is poor, and its filtration efficiency is relatively low. Moreover, the membrane is very thin, and the mechanical strength of the membrane is often challenged. High pressure, high temperature

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