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A heavy metal ion adsorption type PS hollow fiber ultrafiltration membrane and a preparing method thereof

A technology of heavy metal ions and ultrafiltration membranes, applied in the fields of alkali metal compounds, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve the problems of weak adsorption capacity of heavy metal ions, complex process, unsatisfactory effect, etc. Large membrane area and flux, simple preparation process and obvious effect

Active Publication Date: 2015-05-06
VONTRON TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a heavy metal ion adsorption type PS hollow fiber ultrafiltration membrane and its preparation method, to solve the problem that the PS hollow fiber ultrafiltration membrane in the prior art is not strong enough to absorb heavy metal ions, and the process is complicated when used for water treatment And the problem of unsatisfactory effect

Method used

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  • A heavy metal ion adsorption type PS hollow fiber ultrafiltration membrane and a preparing method thereof
  • A heavy metal ion adsorption type PS hollow fiber ultrafiltration membrane and a preparing method thereof

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Effect test

Embodiment 1

[0033] The mass percent formula of the spinning solution is designed as:

[0034] Polysulfone PS 10%;

[0035] Ion exchange resin (average particle size 10um) 15%;

[0036] N-Methylpyrrolidone 70%;

[0037] PEG1000 5%.

[0038] The spinning solution preparation process is as follows: add 15% ion exchange resin into a solvent containing 70% NMP, stir and disperse evenly, add PEG10005%, heat to 50°C and keep it warm for 3 hours to dissolve it, and finally add polysulfone PS gradually 10%, fully stirred and ultrasonically treated to obtain a uniformly dispersed spinning solution.

[0039] The preparation process of hollow fiber ultrafiltration is as follows: pour the spinning solution into the dry-wet machine reactor, control the temperature at 20°C, and vacuum defoam for 60 minutes. Then open the discharge valve, feed nitrogen into the kettle to pressurize to 0.2MPa, then open the spinning pump, control the speed at 15r / min, and control the speed of the core liquid NMP aqueo...

Embodiment 2

[0043] The mass percent formula of the spinning solution is designed as:

[0044] Polysulfone PS 25%;

[0045] Chitosan (average particle size 10um) 1%;

[0046] DMF 60%;

[0047] PEG2000 14%.

[0048]The preparation process of the spinning solution is as follows: add 1% chitosan into a solvent containing 60% DMF, stir and disperse evenly, add 14% PEG2000, heat to 60°C and keep it warm for 3 hours to dissolve it, and finally add 25% chitosan gradually Polysulfone PS, fully stirred and ultrasonically treated to obtain a uniformly dispersed spinning solution.

[0049] The preparation process of hollow fiber ultrafiltration is as follows: pour the spinning solution into the dry-wet machine reactor, control the temperature at 25°C, and vacuum defoam for 60 minutes. Then open the discharge valve, feed nitrogen into the kettle to pressurize to 0.2MPa, then open the spinning pump, control the rotating speed at 35r / min, and control the rotating speed of the core liquid DMF aqueous...

Embodiment 3

[0051] The mass percent formula of the spinning solution is designed as:

[0052] Polysulfone PS 15%;

[0053] Sepiolite (average particle size 10um) 20%;

[0054] DMAC 60%;

[0055] PEG10000 5%.

[0056] The spinning solution preparation process is as follows: add 20% sepiolite into a container containing 60% DMAC, stir and disperse evenly, add 15% PEG2000, heat to 80°C and keep it warm for 3 hours to dissolve it, and finally add 15% Polysulfone PS, fully stirred and ultrasonically treated to obtain a uniformly dispersed spinning solution.

[0057] The preparation process of hollow fiber ultrafiltration is as follows: pour the spinning solution into the dry-wet machine reactor, control the temperature at 35°C, and vacuum defoam for 60 minutes. Then open the discharge valve, feed nitrogen into the kettle to pressurize to 0.2MPa, then open the spinning pump, the speed is controlled at 30r / min, the core liquid DMAC aqueous solution speed is controlled at 20r / min, and the spi...

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Abstract

A heavy metal ion adsorption type PS hollow fiber ultrafiltration membrane and a preparing method thereof are disclosed. After a spinning solution is prepared, the hollow fiber ultrafiltration membrane is prepared by a dry-wet spinning method. The spinning solution comprises polysulfone, additives, a solvent and a pore forming agent. Compared with the prior art, the heavy metal ion adsorption type hollow fiber ultrafiltration membrane belongs to hollow fiber ultrafiltration membranes, has characteristics of a self-supporting property, large membrane area of an assembly, large flux, and the like, and is good in pressure resistance and high in adsorptive property for heavy metal ions. A preparing process of the membrane is simple, stable and prone to industrialization. The adsorption effects for heavy metal ions are obvious.

Description

technical field [0001] The invention relates to the field of membrane technology, in particular to a heavy metal ion adsorption type PS hollow fiber ultrafiltration membrane and a preparation method thereof. Background technique [0002] With the development of the metallurgical industry and the chemical industry, the pollution of wastewater containing heavy metal ions such as lead, copper, chromium, and mercury from electroplating baths and metal smelting processes is becoming more and more serious, which is related to people's health. At present, heavy metal pollution has become a serious environmental problem, and even rises to a problem that needs to be solved urgently for the harmonious development of society and ecology. In recent decades, membrane technology has developed rapidly and has been widely used in sewage treatment, seawater desalination, medical care, energy conservation and environmental protection, and the membrane industry has become an independent high-t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/68B01D67/00B01D69/08B01D69/02B01J20/28B01J20/26C02F1/28C02F1/44C02F1/62
Inventor 郭玉阳梁松苗吴宗策
Owner VONTRON TECH CO LTD
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