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Preparation method and application of an inorganic-organic composite carbon-based conductive ultrafiltration membrane

A composite carbon and ultrafiltration membrane technology, which is applied in ultrafiltration, chemical instruments and methods, and membranes, can solve the problems of electrocatalytic membrane active material shedding, polymers without electrical conductivity, and poor antibiotic treatment effect, etc., to achieve Improved stability, inhibited membrane fouling, and excellent hydrophilicity

Active Publication Date: 2021-10-08
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The common polymer films in membrane separation have stable performance and good separation effect, but because the polymer itself often does not have electrical conductivity, it cannot be applied to the electrocatalytic process; in addition, the existing electrocatalytic membranes are electrochemically involved. The active material of the electrocatalytic membrane falls off, the cycle stability is poor, and the effect on antibiotic treatment is poor

Method used

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  • Preparation method and application of an inorganic-organic composite carbon-based conductive ultrafiltration membrane
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  • Preparation method and application of an inorganic-organic composite carbon-based conductive ultrafiltration membrane

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Embodiment 1

[0048] A method for preparing a silica-polyethersulfone composite carbon-based conductive ultrafiltration membrane, the steps are as follows:

[0049] (1) Pretreatment of the hydrophilic carbon fiber cloth: immerse the hydrophilic carbon fiber cloth in a mixed solution of acetone, deionized water and absolute ethanol for 30 minutes and then put it into a 60°C oven to dry it; in the mixed solution, The volume ratio of acetone, deionized water and absolute ethanol is 1:1:1.

[0050] (2) Preparation of silica sol: the mixed solution of concentrated hydrochloric acid and deionized water with a mass concentration of 36%-38% is mixed with the mixed solution of tetraethyl orthosilicate (TEOS) and dehydrated alcohol (normally The molar ratio of tetraethyl silicate, absolute ethanol, deionized water and concentrated hydrochloric acid is 1:3.8:6.4:0.085), heated and stirred in a water bath magnetic stirrer at 60°C for 3h, and dried in an oven at 80°C for 1h Stand at room temperature for ...

Embodiment 2

[0059] A preparation method of titanium dioxide-polyarylsulfone composite carbon-based conductive ultrafiltration membrane, the steps are as follows:

[0060] (1) Pretreatment of the hydrophilic carbon fiber cloth: immerse the hydrophilic carbon fiber cloth in a mixed solution of acetone, deionized water and absolute ethanol for 30 minutes and then put it into a 60°C oven to dry it; in the mixed solution, The volume ratio of acetone, deionized water and absolute ethanol is 1:1:1.

[0061] (2) Soak the pretreated hydrophilic carbon fiber cloth in a 2mmol / L titanium dioxide solution for 24 hours. This process is carried out in a shaker at 30°C to make the titanium dioxide evenly loaded;

[0062] (3) Preparation of polyarylsulfone (PSF) casting solution: Dissolve PSF powder in a mixed solvent (N, N-dimethylacetamide and N-methylpyrrolidone with a mass ratio of 1:1), mix and stir After 24 hours, let it stand for exhausting for one day to obtain a casting solution, and the concent...

Embodiment 3

[0065] A kind of MoS 2 -The preparation method of PVDF composite carbon-based conductive ultrafiltration membrane, the steps are as follows:

[0066] (1) Pretreatment of the hydrophilic carbon fiber cloth: immerse the hydrophilic carbon fiber cloth in a mixed solution of acetone, deionized water and absolute ethanol for 30 minutes and then put it into a 60°C oven to dry it; in the mixed solution, The volume ratio of acetone, deionized water and absolute ethanol is 1:1:1.

[0067] (2) Soak the pretreated hydrophilic carbon fiber cloth in a 2mmol / L molybdenum disulfide solution for 24h, and this process is carried out in a shaker at 30°C, so that the molybdenum disulfide can be evenly loaded;

[0068] (3) Preparation of polyvinylidene fluoride (PVDF) casting solution: Dissolve PVDF powder in a mixed solvent (N,N-dimethylacetamide and N-methylpyrrolidone with a mass ratio of 1:1), mix After stirring for 24 hours, let it stand for exhaust for one day to obtain a casting solution...

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Abstract

The invention relates to a preparation method of an inorganic-organic composite carbon-based conductive ultrafiltration membrane. In the method, inorganic nanomaterials are combined on the pretreated hydrophilic carbon fiber cloth (CF) by layer-by-layer scraping or soaking. The inorganic nanomaterial film is obtained on the hydrophilic carbon fiber cloth; then the organic material casting liquid is polymerized on the inorganic nanomaterial film by the phase inversion method to obtain the inorganic-organic composite carbon-based conductive ultrafiltration membrane. In the inorganic-organic composite carbon-based conductive ultrafiltration membrane of the present invention, the hydrophilic carbon fiber cloth plays the role of support and conduction, the inorganic nanomaterial and the hydrophilic carbon fiber cloth are firmly combined, and are not affected by electrochemistry. The role of water carbon fiber cloth improves the hydrophilicity of the conductive membrane. The inorganic nanomaterials use their hydrophilicity to make the organic membrane adhere firmly, which improves the stability of the inorganic-organic composite carbon-based conductive ultrafiltration membrane. After 8 cycles, the membrane The performance remains basically the same.

Description

technical field [0001] The invention relates to a preparation method and application of an inorganic-organic composite carbon-based conductive ultrafiltration membrane, belonging to the technical field of membranes. Background technique [0002] Antibiotics are among the most frequently encountered and used chemicals in daily life. Due to the serious abuse of antibiotics in our country, relatively high concentrations of antibiotic substances have been detected in natural water bodies and drinking water, and the refractory nature of antibiotics can remain in water for a long time, seriously endangering drinking water quality and bringing major Public health problems have caused huge environmental pollution, so the solution to antibiotic pollution in water is imminent. [0003] Membrane separation technology has the advantages of simple operation, small footprint, no phase change and no new pollutants during the treatment process, and good separation effect. It has been widel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/68B01D71/42B01D71/34B01D71/02B01D69/02B01D67/00B01D61/14C02F1/44C02F1/467C02F1/72C02F103/34
CPCB01D61/145B01D67/0079B01D69/02B01D71/02B01D71/021B01D71/024B01D71/027B01D71/34B01D71/42B01D71/68B01D2325/26C02F1/444C02F1/4672C02F1/725C02F2103/343
Inventor 孙雪菲刘琳娜王曙光
Owner SHANDONG UNIV