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Preparation method and application of strong-adsorption-type ultrafiltration membrane

An ultrafiltration membrane and strong adsorption technology, applied in chemical instruments and methods, adsorption water/sewage treatment, membranes, etc., can solve the problems of increasing raw material input costs, increasing filtration steps, time-consuming and labor-intensive, etc., and achieve good anti-pollution ability , prevent aggregation, simple preparation method

Active Publication Date: 2019-12-10
WUHAN AQUCELL MEMBRANE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the sewage treatment process, in order to deal with the solutes and particles that cannot be intercepted by the ultrafiltration membrane, pre-treatment is usually required. Usually, it is necessary to use an adsorbent to absorb th

Method used

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  • Preparation method and application of strong-adsorption-type ultrafiltration membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Add 5g of polysulfone to 80g of N-methylpyrrolidone, mix and stir for 10min at normal temperature, the polysulfone is completely dissolved, and the ultrafiltration membrane liquid of polysulfone is obtained. The thickness of the membrane is 200 μm, and it is dried under normal temperature and pressure for 10 minutes to obtain an ultrafiltration membrane;

[0028] Put 10g of fibrous polyimide into 80g of N,N-dimethylacetamide, mix and stir for 10min at room temperature, the fibrous polyimide is completely dissolved, and obtain N,N-dimethylacetamide of polyimide The casting solution of polyimide was defoamed for 30 minutes under vacuum, and the casting solution of polyimide was scraped by a flat film scraping machine. The thickness of the scraping film was 50 μm, and it was dried at room temperature for 10 minutes to obtain an adsorption film;

[0029] Use an electron beam with an energy of 0.5 MeV to irradiate the ultrafiltration membrane and the adsorption membrane vert...

Embodiment 2

[0032] Add 20g of polyethersulfone to 60g of N,N-dimethylformamide, mix and stir for 5min at room temperature, the polyethersulfone is completely dissolved, and the ultrafiltration membrane liquid of polyethersulfone is obtained. The filtrate is subjected to scraping treatment, the thickness of the scraped membrane is 400 μm, and it is dried at normal temperature and pressure for 5 minutes to obtain an ultrafiltration membrane;

[0033] Put 10g of fibrous polyimide into 120g of N,N-dimethylacetamide, mix and stir for 5min at room temperature, the fibrous polyimide is completely dissolved, and obtain N,N-dimethylacetamide of polyimide The casting solution of polyimide was defoamed for 60 minutes under vacuum, and the casting solution of polyimide was scraped by a flat film scraping machine. The thickness of the scraping film was 100 μm, and it was dried at room temperature for 5 minutes to obtain an adsorption film;

[0034] The ultrafiltration membrane and the adsorption membr...

Embodiment 3

[0037] Add 10g of polyvinylidene fluoride to 70g of N,N-dimethylacetamide, mix and stir for 10min at room temperature, the polyvinylidene fluoride is completely dissolved, and obtain the ultrafiltration membrane liquid of polyvinylidene fluoride, and use a flat scraper to remove the polyvinylidene fluoride The vinylidene fluoride ultrafiltration membrane solution is subjected to scraping treatment, the thickness of the scraped membrane is 300 μm, and it is dried at normal temperature and pressure for 10 minutes to obtain an ultrafiltration membrane;

[0038] Put 10g of fibrous polyimide into 100g of N,N-dimethylacetamide, mix and stir for 10min at room temperature, the fibrous polyimide is completely dissolved, and obtain N,N-dimethylacetamide of polyimide The casting solution of polyimide was defoamed for 40 minutes under vacuum, and the casting solution of polyimide was scraped by a flat film scraping machine. The thickness of the scraping film was 80 μm, and it was dried at ...

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Abstract

The invention provides a preparation method and application of a strong-adsorption-type ultrafiltration membrane. The preparation method comprises the steps that the ultrafiltration membrane and an adsorption membrane are prepared, electron beam irradiation modification is adopted to activate the ultrafiltration membrane and the adsorption membrane, a surface active agent is utilized for graft modification, thus the ultrafiltration membrane and the adsorption membrane can be combined, and thus the adsorption ability and hydrophilic performance of the strong-adsorption-type ultrafiltration membrane to heavy metal ions are improved. The strong-adsorption-type ultrafiltration membrane is applied to the field of treatment of sewage containing the heavy metal ions, part of heavy metal in the sewage can be effectively adsorbed, meanwhile, the good filtering performance on high-molecular organic pollutants is achieved, and application prospects are good.

Description

technical field [0001] The invention relates to the technical field of sewage treatment equipment, in particular to a preparation method and application of a strong adsorption ultrafiltration membrane. Background technique [0002] Ultrafiltration membrane is a tool for liquid phase sieve separation driven by the pressure difference between the two ends of the membrane. The ultrafiltration membrane can separate solutes and insoluble particles that are larger than the membrane pores. Small insoluble particles are usually not retained by ultrafiltration membranes. [0003] However, in the sewage treatment process, in order to deal with the solutes and particles that cannot be intercepted by the ultrafiltration membrane, pre-treatment is usually required. Usually, it is necessary to use an adsorbent to absorb the pre-filtered sewage and then filter it. In this way, It not only increases the steps of filtration treatment, but also increases the input cost of raw materials, is t...

Claims

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Application Information

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IPC IPC(8): B01D71/82B01D71/64B01D69/12B01D69/02B01D67/00C02F1/44C02F1/28C02F101/20
CPCB01D71/82B01D71/64B01D69/127B01D69/02C02F1/444C02F1/285B01D2325/12C02F2101/20
Inventor 陈泉学
Owner WUHAN AQUCELL MEMBRANE TECH
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