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Polysulfone amide separating membrane and its modifying method utilizing nanotitanium dioxide

A nano-titanium dioxide and polysulfone amide technology, applied in the field of polymer organic separation membrane modification, can solve problems such as microbial contamination of ultrafiltration membranes, and achieve the effects of simple membrane formation process, improved surface performance, and inhibition of membrane microbial contamination.

Active Publication Date: 2008-10-22
HARBIN INST OF TECH
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  • Summary
  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem of microbial contamination of ultrafiltration membranes, the invention provides a method for modifying polysulfone amide separation membranes by using nano-titanium dioxide

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0015] Embodiment 1: The polysulfoneamide separation membrane of this embodiment is made of 5% to 20% polysulfoneamide, 78% to 94% organic solvent, and 1% to 5% pore-forming agent in terms of weight percentage.

[0016] In this embodiment, the pore forming agent is calcium nitrate, lithium chloride, ammonium chloride, sodium sulfate or PEG.

[0017] In this embodiment, the organic solvent is N-N dimethylacetamide, dimethylacetamide, dimethylformamide or acetone.

[0018] In this embodiment, the polysulfoneamide has a molecular weight of 10,000-1,000,000 Daltons.

[0019] In this embodiment, the polysulfoneamide separation membrane is a flat plate membrane, a tubular membrane, a hollow cellulose membrane, a capillary membrane, a spiral wound membrane, a microfiltration membrane, a separation membrane, a reverse osmosis membrane or a nanofiltration membrane.

specific Embodiment approach 2

[0020] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the polysulfoneamide separation membrane of this embodiment is made of 18% polysulfoneamide, 80% organic solvent, and 2% pore-forming agent in weight percentage.

specific Embodiment approach 3

[0021] Embodiment 3: This embodiment is different from Embodiment 1 in that the polysulfoneamide separation membrane of this embodiment is made of 6% polysulfoneamide, 90% organic solvent, and 4% pore-forming agent according to weight percentage.

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PUM

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Abstract

The present invention relates to a polyphenylene sulfonamide separation membrane and its modification method by using nano titanium dioxide. Said polyphenylene sulfonamide separation membrane is made up by using (by wt%) 5%-20% of polyphenylene sulfonamide, 78%-94% of organic solvent and 1%-5% of pore-forming agent through a certain preparation process. Its modification method includes the following steps: a), soaking the polyphenylene sulfonamide separation membrane in concentrated sulfuric acid for 1-3hr, then cleaning said polyphenylene sulfonamide separation membrane by using deionized water; and b) soaking the polyphenylene sulfonamide separation membrane in the nano titanium dioxide sol for 5-15min, finally using deionized water to wash said polyphenylene sulfonamide separation membrane so as to obtain the invented nano titaminum dioxide modified polyphenyl sulfonamide separation membrane.

Description

technical field [0001] The invention relates to a method for modifying a polymer organic separation membrane, in particular to a method for modifying a polysulfone amide separation membrane by using nano titanium dioxide. Background technique [0002] Water is an important resource for human survival and development. my country's per capita water resources are 2200m 3 , which is only 1 / 4 of the world's average level, and belongs to the water-scarce countries. The quality of effluent from urban sewage plants cannot meet the "water quality standards for domestic miscellaneous water", and its direct discharge will also cause eutrophication of water bodies, which not only causes a great waste of water resources, but also brings serious environmental pollution. The urban sewage resource technology can not only open up the second water resource of the city, but also reduce the pollution of the water environment. It is one of the high-tech urgently needed for the sustainable deve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/66B01D71/56
Inventor 于水利赵晴吕慧
Owner HARBIN INST OF TECH
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