A kind of preparation method of composite nanomaterial hybrid membrane and hybrid membrane prepared thereby

A technology of composite nanomaterials and hybrid membranes, which is applied in the field of preparation of hybrid membranes and composite nanomaterial hybrid membranes, to achieve the effects of improving production efficiency, enhancing mechanical properties, and simple and efficient post-processing processes

Active Publication Date: 2021-05-28
VONTRON TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] In order to solve as far as possible the problems in the preparation and performance of nanomaterial separation membranes, the present invention proposes a method for preparing a composite separation membrane hybridized with nanocellulose crystals and graphene oxide.

Method used

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  • A kind of preparation method of composite nanomaterial hybrid membrane and hybrid membrane prepared thereby
  • A kind of preparation method of composite nanomaterial hybrid membrane and hybrid membrane prepared thereby
  • A kind of preparation method of composite nanomaterial hybrid membrane and hybrid membrane prepared thereby

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preparation example Construction

[0049] Based on the above inventive concept, the present invention provides a method for preparing a composite nanomaterial hybrid film, which is characterized in that it comprises the following steps:

[0050] (1) dispersing the nanocellulose crystals in water to obtain a nanocellulose crystal dispersion;

[0051] (2) graphene oxide is dispersed in water to obtain graphene oxide dispersion;

[0052] (3) mixing the nanocellulose crystal dispersion liquid and the graphene oxide dispersion liquid to make a mixed dispersion liquid;

[0053] (4) Treat the basement membrane with a hydrophilic treatment solution;

[0054] (5) coating the mixed dispersion liquid on the above-mentioned treated base film to form a functional layer;

[0055] (6) After post-treatment and drying, a composite nanomaterial hybrid film is obtained.

[0056] It should be noted that, in the present invention, there is no sequence among the above steps (1), (2), and (4), and there is no sequence between step...

Embodiment 1

[0076] Preparation of graphene oxide (GO) dispersion: Disperse 0.025g single-layer graphene oxide (thickness is about 1nm, size 2-10μm) in 50g deionized water under 100W ultrasonic power, the ultrasonic process lasts 10min, disperse The concentration of graphene oxide in the solution was 0.05% by mass.

[0077]Preparation of nanocellulose crystal (CNC) dispersion: 0.025g of nanocellulose crystal powder (diameter 10nm, length 200nm) was dispersed in 50g of water, and the concentration of nanocellulose crystal in the dispersion was 0.05% by mass.

[0078] The above-mentioned GO dispersion liquid and CNC dispersion liquid were mixed according to the mass ratio of 98:2 to obtain a mixed dispersion liquid.

[0079] The polyethersulfone (PES) bacterial filter membrane is selected as the base membrane, the membrane pore size is 0.45 μm, and the membrane diameter is 9 mm. The base film was soaked in 0.1% by mass polyvinylpyrrolidone (PVP) aqueous solution for 1 min and then dried to ...

Embodiment 2

[0082] Preparation of graphene oxide (GO) dispersion: Disperse 0.025g single-layer graphene oxide (thickness is about 1nm, size 2-10μm) in 50g deionized water under 100W ultrasonic power, the ultrasonic process lasts 10min, disperse The concentration of graphene oxide in the solution was 0.05% by mass.

[0083] Preparation of nanocellulose crystal (CNC) dispersion: 0.025g of nanocellulose crystal powder (diameter 10nm, length 200nm) was dispersed in 50g of water, and the concentration of nanocellulose crystal in the dispersion was 0.05% by mass.

[0084] The above-mentioned GO dispersion liquid and CNC dispersion liquid were mixed according to the mass ratio of 95:5 to obtain a mixed dispersion liquid.

[0085] The polyethersulfone (PES) bacterial filter membrane is selected as the base membrane, the membrane pore size is 0.45 μm, and the membrane diameter is 9 mm. The base film was soaked in 0.1% by mass polyvinylpyrrolidone (PVP) aqueous solution for 1 min and then dried to...

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Abstract

The invention relates to a method for preparing a composite nanomaterial hybrid membrane and the hybrid membrane prepared thereby. The hybrid membrane can be applied to separation and concentration technologies in the fields of water treatment, dyestuff, biochemical industry, food, environmental protection and the like. The preparation method of the present invention achieves the following technical effects: the preparation process is highly efficient, and the process is suitable for industrial scale-up production; the size of the pores can be regulated to adapt to different application scenarios; the post-processing process is simple and efficient, and the preparation efficiency is further improved; the membrane material itself is enhanced Excellent mechanical properties, improve the stability of the diaphragm under strong cross-flow and long-term operation.

Description

technical field [0001] The invention relates to the technical field of filter membranes, in particular to a method for preparing a composite nanomaterial hybrid membrane and the hybrid membrane prepared thereby. The method realizes regulation and control of the pore size of the hybrid membrane, enhances the mechanical properties of the hybrid membrane, and improves the stability of the hybrid membrane under strong cross-flow and long-term operation. Background technique [0002] With the process of industrialization and urbanization, the scarcity of safe and reliable water resources has become one of the greatest challenges facing mankind. However, the domestic and industrial waste brought by human activities has caused serious pollution to water resources, which has exacerbated this problem. In order to solve the problems of water pollution and water scarcity, efficient, energy-saving and reliable water treatment solutions have become one of the most urgent needs of human ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D67/00B01D69/02B01D69/10B01D69/12B01D71/02
CPCB01D67/0079B01D69/02B01D69/105B01D69/12B01D71/024B01D2323/18B01D2325/24
Inventor 王祝愿梁松苗康燕彭伟金焱吴宗策胡利杰
Owner VONTRON TECH CO LTD
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