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Preparation method of super-water-purification filtering membrane

A filtration membrane and ultra-clean water technology, applied in the field of environmental engineering, can solve the problems of wasting energy, weakening the adsorption of activated carbon, reducing the water purification capacity of activated carbon, etc., and achieving the effect of prolonging service life and good chemical stability

Active Publication Date: 2017-10-20
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process of the filter element uses a large amount of chemical reagents and is sintered, which wastes energy and weakens the adsorption of activated carbon itself during the sintering process, reducing the water purification capacity of activated carbon.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0029] A kind of preparation method of ultra-clean water filtration membrane, described preparation method is carried out according to the following steps:

[0030] a. Preparation of polymer material / activated carbon solution

[0031] Add one of these three polymer materials in polyurethane or polyacrylonitrile or polylactic acid to dimethyl sulfoxide or 1,4-dioxane, stir until completely dissolved, and mix with activated carbon and polymer materials. Add activated carbon with a specification of 800-900 mesh to the solution at a mass ratio of 1:1-2:1 and stir for 1-4 hours, then place it in an environment with a vacuum of 0.05-0.1 MPa for 2-5 hours to remove the bubbles in the solution, that is A polymer material / activated carbon solution with a mass fraction of 4-6% is obtained.

[0032] b. Preparation of polymer material / activated carbon body

[0033] Place a through-column mold made of polytetrafluoroethylene with a wall thickness of 3 to 10 mm above a metal conductor mad...

Embodiment 1

[0037] a. Preparation of Polyurethane / Activated Carbon Solution

[0038] Add 2g of polyurethane to 96g of dimethyl sulfoxide, stir until it is completely dissolved, add 2g of activated carbon with a specification of 800 mesh to the solution and stir for 1h, then place it in an environment with a vacuum of 0.05MPa for 2h to remove the Bubbles, that is, to obtain a polyurethane / activated carbon solution with a mass fraction of 4%.

[0039] b. Preparation of polyurethane / activated carbon body

[0040] Place a through-column mold made of polytetrafluoroethylene with a wall thickness of 3 mm above a metal conductor made of copper, aluminum or silver, soak the metal conductor in liquid nitrogen, and then place the metal conductor made by step a The polymer material / activated carbon solution is poured into the mold, and a solution layer with a height of 5mm is formed in the mold. Under the action of the low temperature of liquid nitrogen, the polyurethane / activated carbon solution i...

Embodiment 2

[0044] a. Preparation of Polyurethane / Activated Carbon Solution

[0045] Add 2g of polyurethane to 95g of 1,4-dioxane, stir until completely dissolved, add 3g of 850-mesh activated carbon to the solution and stir for 2.5h, then place it in an environment with a vacuum of 0.07MPa for 3h , Remove the air bubbles in the solution to obtain a polyurethane / activated carbon solution with a mass fraction of 5%.

[0046] b. Preparation of polyurethane / activated carbon body

[0047] Place a through-column mold made of polytetrafluoroethylene with a wall thickness of 7mm above the metal conductor made of copper, aluminum or silver, and the metal conductor is soaked in liquid nitrogen, and then the metal conductor prepared in step a The polymer material / activated carbon solution is poured into the mold, and a solution layer with a height of 7mm is formed in the mold. Under the action of the low temperature of liquid nitrogen, the polyurethane / activated carbon solution in the mold is slow...

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PUM

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Abstract

The invention relates to a preparation method of a super-water-purification filtering membrane and belongs to the field of environmental engineering. The preparation method has the advantages that a certain proportion of activated carbon particles is added into a high polymer material solution dissolved into an organic solvent, and the directional freezing technology is used to control the growth direction of ice crystals to form a regular structure; the frozen water-phase high polymer material solution is subjected to freeze drying under a vacuum low-temperature environment to form a hollow fiber array structure, and filtering efficiency is increased; the organic solvent used in the method is high in freezing point, freezing time is shortened greatly, and energy loss is avoided; in addition, the method is simple in process and low in cost; the super-water-purification filtering membrane prepared by combining the adsorption performance of activated carbon is even in pore diameter and widely applicable to fields such as chemical industry, petroleum, light industry and daily chemicals.

Description

technical field [0001] The invention relates to a preparation method of an ultra-clean water filtration membrane, which belongs to the field of environmental engineering. Background technique [0002] Activated carbon is a kind of black porous solid carbon, which is produced from coal by crushing, forming or carbonizing and activating with uniform coal particles. The specific surface area of ​​ordinary activated carbon is 500~1700m 2 / g has strong adsorption performance and is widely used in the field of water purification. It can effectively absorb chemical agents such as residual chlorine, odor, color, and pesticides in water; the sophisticated activated carbon filter element can effectively remove bacteria, toxins, and heavy metals in water. Wait. [0003] At present, the research on activated carbon in water purification has attracted the attention of scientific research work at home and abroad. For example, a moldable antibacterial foam activated carbon water purific...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/42B01D71/54B01D71/48B01D69/08B01D67/00C02F1/28C02F1/44
Inventor 杨红军张骞徐卫林肖杏芳庄燕翁雅雪
Owner WUHAN TEXTILE UNIV