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In situ synthesis graphene oxide/porous ceramic composite membrane preparation method

A technology of porous ceramics and in-situ synthesis, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the difficulty of dispersion of graphene oxide membrane-making liquid, the binding force between the membrane layer and the support, and the repeated coating process Complicated and cumbersome problems, to avoid the complicated and cumbersome problems of repeated coating process, good binding force and simple process

Inactive Publication Date: 2015-08-26
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the film-making process, the graphene oxide is first dispersed to prepare the film-forming liquid, and then the support is repeatedly placed in the film-forming liquid to prepare the graphene oxide film. This process has the problem of complicated and cumbersome repeated coating processes. The difficulty of dispersing the membrane liquid and the binding force between the prepared membrane layer and the support

Method used

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  • In situ synthesis graphene oxide/porous ceramic composite membrane preparation method
  • In situ synthesis graphene oxide/porous ceramic composite membrane preparation method
  • In situ synthesis graphene oxide/porous ceramic composite membrane preparation method

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preparation example Construction

[0012] Such as image 3 Shown, the present invention is the preparation method of in-situ synthesis graphene oxide / porous ceramic composite membrane, and its steps are:

[0013] (1) Configuration of silanization modification solution: Add silane coupling agent to organic solvent to prepare silanization modification solution. The volume ratio of silane coupling agent to organic solvent is 2~5:30~50 ;

[0014] (2) Silanization modification of porous ceramic support body: Put the porous ceramic support body into the silanization modification solution, let it stand for 2-10 hours at a temperature of 30-85°C, and then take out the porous ceramic support body from the modification solution. The ceramic support body is dried at normal temperature to obtain a silane-modified porous ceramic support body;

[0015] (3) Preparation of graphene oxide / ceramic composite membrane: The silane-modified porous ceramic support was directly put into the reaction solution for preparing graphene o...

Embodiment 1

[0020] (1) Mix y-glycidyl etheroxypropyltrimethoxysilane and absolute ethanol at a volume ratio of 3:50 to prepare a silane modification solution;

[0021] (2) The flake Al with an average pore size of 350nm 2 o 3 After the support body is ultrasonicated, put it into the prepared silane modification solution, and let it stand at 70°C for 5 hours;

[0022] (3) The modified Al 2 o 3 The support body was put into the graphene oxide reaction solution prepared by the Hummers method, and the reaction time was 4 hours; (4) After the preparation was completed, the graphene oxide / porous ceramic composite membrane was taken out, washed with deionized water, and then dried at room temperature . A porous ceramic graphene oxide composite membrane prepared by in-situ oxidation was obtained. The film thickness of the graphene oxide / porous ceramic composite membrane was measured to be 80nm.

Embodiment 2

[0024] (1) Mix 3-(methacryloyloxy)propyltrimethoxysilane and toluene at a volume ratio of 3:40 to prepare a silane modification solution;

[0025] (2) Tubular Al with an average pore diameter of 80nm 2 o 3 / TiO 2 After the composite material support is polished with 1000-grit sandpaper, it is put into the prepared silane modification solution by ultrasonic, and it is left standing at 55°C for 8h;

[0026] (3) The modified Al 2 o 3 / TiO 2 The composite material support body was put into the graphene oxide reaction solution prepared by the Hummers method, and the reaction time was 4.5h;

[0027] (4) After the preparation, the graphene oxide / porous ceramic composite membrane was taken out, washed with deionized water, and left to dry at room temperature. A porous ceramic graphene oxide composite membrane prepared by in-situ oxidation was obtained. The film thickness of the graphene oxide / porous ceramic composite membrane was measured to be 120nm.

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Abstract

An in situ synthesis graphene oxide / porous ceramic composite membrane preparation method comprises the following steps: (1) a silane coupling agent is added into an organic solvent for the preparation of a silane modified solution, and the volume ratio of silane coupling agent to organic solvent is 2-5:30-50; (2) a porous ceramic support is put into the silane modified solution for standing for 2-10 hours, under the condition of the temperature of 30-85 DEG C, the porous ceramic support is taken out from the silane modified solution to obtain a silane modified porous ceramic support; (3) the silane modified porous ceramic support is put into a reaction liquid for Hummers method preparation of graphene oxide, a graphene oxide / porous ceramic composite membrane with the thickness value of 80-300 nm is prepared by controlling of the reaction temperature and reaction time, and the graphene oxide / porous ceramic composite membrane is taken out from the reaction liquid, and is died by standing at room temperature to obtain an in situ synthesis graphene oxide / porous ceramic composite membrane.

Description

technical field [0001] The invention relates to a method for preparing an in-situ synthesized graphene oxide / porous ceramic composite membrane. The prepared composite membrane can be used for the separation of organic water solvent mixed systems in industry and other fields. Background technique [0002] At present, for the treatment and purification of waste water in food processing, biopharmaceuticals, seawater desalination, and the environment, ultrafiltration separation membranes have become new materials in the field of heavy separation of organic water solvent mixtures, and have their unique properties and advantages. In the treatment of oily wastewater and the separation of organic solutions, the selection of membrane materials is very important. In recent years, although organic polymer separation membranes have achieved great success and development in the application of microfiltration, nanofiltration, and reverse osmosis separation, the process still has problems ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01D69/12B01D67/00
Inventor 张栋强李搏冉晶吴见洋
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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