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Ultrafiltration membrane with photocatalytic activity and preparation method and application thereof

A technology of photocatalytic activity and ultrafiltration membrane, which is applied in the field of membrane separation, can solve the problems of ultrafiltration membrane catalytic performance decline, photocatalyst easy to fall off, etc., and achieve excellent photocatalytic performance and stability, excellent photocatalytic performance and stability , the effect of improving stability

Active Publication Date: 2022-05-27
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a photocatalytically active ultrafiltration membrane and its preparation method and application, to solve the problem that the photocatalyst in the prior art is easy to fall off and cause the catalytic performance of the ultrafiltration membrane to decline. question

Method used

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  • Ultrafiltration membrane with photocatalytic activity and preparation method and application thereof
  • Ultrafiltration membrane with photocatalytic activity and preparation method and application thereof
  • Ultrafiltration membrane with photocatalytic activity and preparation method and application thereof

Examples

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Embodiment 1

[0022] S1. Use a plasma machine with a power of 100 W to activate the expanded polytetrafluoroethylene film for 4 minutes, and then paste the plasma-treated ePTFE film into a glass mold. A 20% wt acrylic solution was added to a glass mold, and nitrogen gas was bubbled through the glass mold solution for 10 min to remove dissolved oxygen, which was heated at 70 °C for 6 h.

[0023] S2. In a vacuum glove box, place the pretreated expanded polytetrafluoroethylene film in a polytetrafluoroethylene liner filled with ethylene glycol (10 mL) and n-butyl titanate (0.1 mL). Stir in a vacuum glove box for 8 hours. Subsequently, 0.15 ml of concentrated sulfuric acid solution and 20 ml of acetone were added to the above solution, and the mixture was transferred to an autoclave and heated at 160° C. to 200° C. for 3 to 9 h. After the experiment, the membrane was repeatedly washed with 1:3 isopropanol and ammonia solution, that is, an ultrafiltration membrane with photocatalytic activity w...

Embodiment 2-4

[0025] The preparation method of the photocatalytic ultrafiltration membrane in Examples 2-4 is the same as that in Example 1, except that the concentration of acrylic acid is different.

Embodiment 5-6

[0027] The preparation method of the photocatalytic ultrafiltration membrane in Examples 5-6 is the same as that in Example 1, except that acrylic acid is replaced with methyl methacrylate and hydroxyethyl methacrylate. And after the grafting is completed, it is hydrolyzed with alkali and then acidified.

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Abstract

The invention discloses an ultrafiltration membrane with photocatalytic activity and a preparation method and application thereof, the ultrafiltration membrane comprises a polytetrafluoroethylene membrane and urchin-shaped titanium dioxide loaded on the surface of the polytetrafluoroethylene membrane, and the titanium dioxide is loaded on the surface of the polytetrafluoroethylene membrane through in-situ growth. According to the ultrafiltration membrane with the photocatalytic activity, the sea urchin-shaped titanium dioxide synthesized by a solvothermal method is adopted, so that the ultrafiltration membrane not only has excellent photocatalytic performance and stability, but also has a relatively high specific surface area, and can be used for adsorbing and synergistically catalyzing various organic pollutants; moreover, the photocatalyst titanium dioxide is loaded on the ultrafiltration membrane through in-situ growth, so that the photocatalyst titanium dioxide is not easy to fall off, the problem that the photocatalyst is easy to lose is well solved, and the photocatalytic performance of the ultrafiltration membrane has stability in long-time use.

Description

technical field [0001] The invention relates to the technical field of membrane separation, in particular to an ultrafiltration membrane with photocatalytic activity and a preparation method and application thereof. Background technique [0002] Ultrafiltration membrane is a common and effective water treatment technology, but ultrafiltration membrane water treatment still faces a series of problems. Due to the existence of organic pollutants, microorganisms and inorganic salts in the water body, the phenomenon of membrane fouling occurs. The phenomenon of membrane fouling will reduce the separation performance of the ultrafiltration membrane during filtration, and the service life of the membrane will be greatly reduced, and even eventually lead to the failure of the membrane function. Optimizing control factors to mitigate pollution does not fundamentally solve the problem. [0003] To this end, the prior art combines photocatalytic technology with ultrafiltration membra...

Claims

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Application Information

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IPC IPC(8): B01D61/14B01D71/36B01D67/00C02F1/44C02F1/30C02F101/30
CPCB01D61/145B01D71/36B01D67/0079C02F1/444C02F1/30C02F2305/10C02F2101/30C02F2101/308Y02W10/37
Inventor 郑汶江廖蓬杨帆邹伟颜杰杨虎
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING