A polyethersulfone ultrafiltration membrane and its application in the field of hemodialysis

A polyethersulfone ultrafiltration membrane, polyethersulfone membrane technology, applied in ultrafiltration, dialysis system, membrane technology and other directions, can solve the problems of poor compatibility, reduced membrane separation performance, easy to produce membrane defects, etc., to achieve good affinity Water ability, the effect of preventing agglomeration

Active Publication Date: 2021-07-09
青岛市中医医院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it is often mentioned in patents that nano-inorganic particles can be molecular sieves, especially NaA molecular sieves, molecular sieves are rarely used in practical applications.
The main reason is that the particle size of molecular sieves, especially NaA molecular sieves, is generally larger than 1 μm, which has poor compatibility with polyethersulfone polymers, which makes membrane defects more likely to occur, thereby reducing the separation performance of the membrane.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0042] (1) Mix in-situ synthesized NaA molecular sieves (average particle size of 1.5 μm) and ethanol at a mass ratio of 1:50, and send them into a zirconia ball mill tank for ball milling. Set the ball milling speed to 450rpm, and the ball milling time for 6h. After the ball milling, the sample was dried and tested to have a particle size of 120nm;

[0043] (2) Evaporate the ball-milled NaA molecular sieve particle suspension to remove part of the ethanol solvent to obtain the ball-milled NaA molecular sieve particle additive solution. At this time, the mass ratio of NaA molecular sieve to ethanol in the additive solution is 1:4;

[0044] (3) Mix 5wt% of the above ball-milled NaA molecular sieve particle addition solution, 40wt% polyethersulfone and 55% dimethylformamide, mechanically stir for 1 hour, and ultrasonically disperse for 2 hours to prepare a polyethersulfone casting solution;

[0045] (4) Coat the polyethersulfone casting liquid on the non-woven fabric carrier, s...

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PUM

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Abstract

The invention provides a high-flux polyethersulfone membrane, which mixes NaA molecular sieve after ball milling with traditional polyethersulfone casting solution to prepare polyethersulfone ultrafiltration membrane blended with hydrophilic molecular sieve, and The membrane is placed in the NaA molecular sieve synthesis solution for hydrothermal crystallization, so that the ball-milled NaA molecular sieve particles at the edge of the channel induce the synthesis of a complete NaA molecular sieve, which significantly improves the water flux of the membrane. The polyethersulfone membrane material prepared by the invention can be applied in the field of hemodialysis.

Description

technical field [0001] The application relates to an organic membrane, in particular to a polyethersulfone ultrafiltration membrane material with large flux and its application in the field of hemodialysis. Background technique [0002] Polyethersulfone is a polymer material with excellent comprehensive properties. It has good chemical stability, acid and alkali resistance, heat resistance and aging resistance. It is used in ultrafiltration, microfiltration, reverse osmosis, gas separation, alcohol It has been widely used in water separation, olefin / alkane separation, immobilized carrier, hemodialysis and so on. Especially in the field of hemodialysis, due to the strong hydrophobicity of the surface of the polyethersulfone membrane material, it is easy to generate adsorption and deposition on the membrane surface, which hinders the membrane pores, causes membrane pollution, reduces the performance of the membrane, and shortens the service life. In order to further improve t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/68B01D61/14B01D67/00A61M1/16
CPCA61M1/16B01D61/145B01D67/0079B01D71/68
Inventor 李永伟胡维华其他发明人请求不公开姓名
Owner 青岛市中医医院
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