Polysulfone ultrafiltration membrane and application thereof to fields of drinking water purification and sewage reuse

A technology of polysulfone ultrafiltration membrane and polysulfone membrane, which is applied in water/sewage treatment, water/sludge/sewage treatment, permeation/dialysis water/sewage treatment, etc. It can solve poor compatibility, reduce membrane separation performance, Easy to produce membrane defects and other problems, achieve good hydrophilicity and prevent agglomeration

Active Publication Date: 2019-02-19
成都硕特科技股份有限公司
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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 polysulfone polymers, which makes it easier to produce membrane defects, which reduces 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% polysulfone and 55% dimethylformamide, mechanically stir for 1 hour, and ultrasonically disperse for 2 hours to prepare a polysulfone casting solution;

[0045] (4) Coat the polysulfone casting liquid on the non-woven fabric carrier, scrape the film ...

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PUM

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Abstract

The invention provides a high-flux polysulfone membrane. NaA molecular sieves subjected to ball milling are mixed with traditional polysulfone casting solution to prepare a hydrophilic molecular sieveblended polysulfone ultrafiltration membrane, the membrane is subjected to hydrothermal crystallization in NaA molecular sieve synthetic solution to enable induction synthesis of intact NaA molecularsieves through ball milling NaA molecular sieve particles at the pore passage edge, and water flux of the membrane is remarkably increased. The polysulfone membrane material prepared according to themethod can be applied to the fields of drinking water purification, sewage reuse and the like.

Description

technical field [0001] The application relates to an organic membrane, in particular to a polysulfone ultrafiltration membrane material with large flux and its application in various fields. Background technique [0002] Polysulfone membrane material is a new type of membrane material developed in recent years. Compared with other types of membrane materials, polysulfone membrane material has the advantages of strong rigidity, chemical corrosion resistance, high temperature resistance and acid and alkali resistance, so its development is extremely Rapidly, it has become the most widely used organic membrane material in modern industry. However, polysulfone membrane materials are hydrophobic membrane materials in nature. In order to further improve the performance of polysulfone membrane materials, many researches on its modification have been carried out. Among them, adding hydrophilic nanoparticles to polysulfone membrane materials to improve the hydrophilicity of polysulf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/68B01D61/14B01D67/00C02F1/44
CPCB01D61/145B01D67/0079B01D71/68C02F1/444
Inventor 不公告发明人
Owner 成都硕特科技股份有限公司
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