Novel tree-shaped nano-level cylindrical-hole filter membrane having 14 branch holes for liquid-liquid separation

Abstract

The invention relates to a novel tree-shaped nano-level cylindrical-hole filter membrane having 14 branch holes for liquid-liquid separation. Multiple uniformly distributed tree-shaped structural cylindrical through holes are manufactured in one layer of solid material; each through hole comprises a relatively large main hole and 14 relatively small branch holes; the 14 branch holes are all parallel to the corresponding main hole and completely communicate with the main hole; the surface material of the main hole is the same as the surface materials of the branch holes; each branch hole is a filter hole, and the length of each branch hole is determined according to a filter hole strength requirement; the main hole is used for reducing the flowing resistance of the filter membrane; one typeof liquid in a liquid mixture to be separated is low in physical adsorption to the surface of the main hole, and the rest of liquid in the liquid mixture is high in physical adsorption to the surfaceof the main hole; the radius of each branch hole is Rb, 1=(0.1-0.2)Rcr; Rcr is a critical cylindrical hole radius required to enable the liquid, which is low in physical adsorption to the surface ofthe main hole, in the liquid mixture to become continuous medium flowing; the layer of solid material is the filter membrane.

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 14 branch holes for liquid-liquid separation. 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 m...

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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.

The commonly used liquid-liquid separation methods described above are limited to two specific liquids with large differences in physical properties, such as large differences in density and mutual insolubility, or large differences in boiling points, or large differences in solubility of solutes in two solvents

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