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Preparation method of graphene-based composite separation membrane device

A graphene-based, separation membrane technology, applied in chemical instruments and methods, semi-permeable membrane separation, membrane technology, etc., can solve problems such as unrealized, and achieve the effects of low cost, easy availability of raw materials, and low operating pressure

Inactive Publication Date: 2012-09-19
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Graphene has excellent characteristics such as high strength, high conductivity, and large specific surface area, making it widely used in the fields of reinforcement materials, supercapacitors, transistors, etc. The application of nanofiltration membrane process has not yet been realized

Method used

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  • Preparation method of graphene-based composite separation membrane device
  • Preparation method of graphene-based composite separation membrane device

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Experimental program
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preparation example Construction

[0019] The preparation method of graphene-based composite separation membrane device comprises the following steps:

[0020] 1) dissolving 1 part by weight of graphene oxide raw material in 100-5000 parts by weight of deionized water, and treating it in an ultrasonic bath of 1-50 Hz for 0.1-1 hour to obtain a graphene oxide solution;

[0021] 2) Mix 1 part by weight of graphene oxide solution with 0.0001 part by weight of alkali, stir for 0.1 to 5 hours at a temperature of 80 to 100 degrees Celsius, cool to room temperature, centrifuge, and wash with deionized water until pH = 6 to 12 , to obtain a reduced graphene oxide dispersion;

[0022] 3) Pour the graphene dispersion into a suction filter bottle lined with a filter membrane, filter for 0.1-10 hours, and dry in a vacuum oven to obtain a graphene thin layer with a thickness of 20-200nm and a filter pore size of 0.2-2μm. Graphene-based composite separation membrane made of laminated filter membrane;

[0023] 4) The graphe...

Embodiment 1

[0028] 1) Dissolving 1 part by weight of graphene oxide raw material in 100 parts by weight of deionized water, and treating it in a 1 Hz ultrasonic bath for 0.1 hour to obtain a graphene oxide solution;

[0029] 2) Mix 1 part by weight of graphene oxide solution with 0.0001 part by weight of NaOH, stir at 80 degrees Celsius for 0.1 hour, cool to room temperature, centrifuge, wash with deionized water to pH = 6, and obtain reduced graphite oxide olefin dispersion;

[0030] 3) Pour the graphene dispersion into a suction filter bottle lined with anodized aluminum, filter for 0.1 hour, and dry in a vacuum oven to obtain a graphene thin layer with a thickness of 200nm and a filter membrane with a filter pore size of 0.2μm. The graphene-based composite separation membrane formed;

[0031] 4) The graphene-based composite separation membrane is placed in a cross-flow filtration device to obtain a graphene-based composite separation membrane device.

[0032] After the above steps, t...

Embodiment 2

[0034] 1) Dissolving 1 part by weight of graphene oxide raw material in 5000 parts by weight of deionized water, and treating it in a 50 Hz ultrasonic bath for 1 hour to obtain a graphene oxide solution;

[0035] 2) Mix 1 part by weight of graphene oxide solution with 0.0001 part by weight of KOH, stir at 100 degrees Celsius for 5 hours, cool to room temperature, centrifuge, wash with deionized water until pH = 12, and obtain reduced graphite oxide olefin dispersion;

[0036] 3) Pour the graphene dispersion into a suction filter bottle filled with mixed cellulose esters, filter for 10 hours, and dry in a vacuum oven to obtain a graphene thin layer with a thickness of 20nm and a filter membrane with a filter pore size of 2 μm. The graphene-based composite separation membrane formed;

[0037] 4) Putting the graphene-based composite separation membrane in a dead-end filter device to obtain a graphene-based composite separation membrane device.

[0038] After the above steps, th...

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Abstract

The invention discloses a preparation method of a graphene-based composite separation membrane device. The preparation method comprises the following steps of (1) dissolving a graphene oxide raw material in deionized water to be processed in ultrasonic bath to obtain the graphene oxide solution; (2) mixing and blending the graphene oxide solution with alkali under a given temperature, and then washing the mixture with deionized water to obtain the reduced graphene oxide dispersion liquid; (3) pouring the graphene dispersion liquid into a suction filtering flask to be filtered, and drying the graphene dispersion liquid in a vacuum drying box to obtain a graphene-based composite separation membrane; and (4) placing the graphene-based composite separation membrane inside a filtering device to obtain the graphene-based composite separation membrane device. The preparation method is simple and convenient, low in cost and environment-friendly, is suitable for industrialized mass production, has high separation efficiency, large water flux and good flexibility, is resistant to acid, alkali and high temperature and can be used in the fields of water treatment, solvent separation, nano-particle screening and the like. The separation membrane device can realize high-efficient separation of nano particles, organic dye, biological hormenes and metal salt.

Description

technical field [0001] The invention relates to a preparation method of a separation membrane device, in particular to a preparation method of a graphene-based composite separation membrane device. Background technique [0002] Graphene is a layer of carbon atoms with sp 2 Two-dimensional materials formed by connecting hybrid phases. Since it was discovered by A. K. Geim (K. S. Novoselov, et al. Science, 2004, 306, 666-669) in the United Kingdom in 2004, it has attracted extensive attention from the scientific and industrial circles. Graphene is the thinnest two-dimensional material found so far, and it has extremely high strength and specific surface area. In addition to outstanding mechanical properties, graphene also has extremely high carrier mobility and thermal conductivity, and has broad application prospects in optoelectronics, materials and other fields. Using natural graphite as raw material, graphene can be mass-produced by chemical oxidation-reduction method. ...

Claims

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Application Information

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IPC IPC(8): B01D67/00B01D69/12B01D71/02B01D71/00C01B31/04C01B32/192
Inventor 高超韩燚
Owner ZHEJIANG UNIV
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