A kind of seawater desalination micro-nano membrane material, its preparation method and application

A membrane material, micro-nano technology, applied in the field of membrane material technology and seawater desalination, can solve problems such as restricting the development of seawater desalination membrane materials, secondary water pollution, and complicated preparation process, and achieve good large-scale preparation application prospects and low prices. , the effect of simple process

Active Publication Date: 2022-03-22
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Application Information

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Problems solved by technology

Compared with this technology, the preparation method is significantly different. In addition, its composition is complex, the preparation process is cumbersome, and the organic solvent used will still cause secondary water pollution, which restricts the development of seawater desalination membrane materials.
[0006] Yu Guihua and others from the University of Texas at Austin developed a gel with hierarchical nanostructures for seawater evaporation, and its evaporation efficiency can reach 3.2kg / m under one sun 2 / h, but its material strength is only 10 4 Pa, and the preparation process has to go through 10 times of freeze-drying, which is relatively complicated (Nature Nanotechnology, 2018, 13, 489–495)
[0007] The research group of Professor Zhu Jia of Nanjing University used the heat released by the steam generated during the evaporation of seawater to sterilize the bacteria in the collection container (Advanced Materials, DOI: 10.1002 / adma.201805159), but it has no effect on the bacteria in seawater. inhibition

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  • A kind of seawater desalination micro-nano membrane material, its preparation method and application
  • A kind of seawater desalination micro-nano membrane material, its preparation method and application
  • A kind of seawater desalination micro-nano membrane material, its preparation method and application

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preparation example Construction

[0058] As another aspect of the technical solution of the present invention, it also relates to a preparation method of seawater desalination micro-nano membrane material, which includes:

[0059] Dispersing the carbon-based material in the first liquid phase system to form a carbon-based material dispersion;

[0060] Transferring the carbon-based material dispersion to the liquid surface of the second liquid phase system, followed by capillary extrusion to form a carbon-based material film layer;

[0061] Transferring the carbon-based material thin film layer to a nanoparticle solution system, and performing evaporation deposition, so that a plurality of nanoparticles are deposited on the carbon-based material thin film layer to form a carbon-nanoparticle hybrid thin film layer;

[0062] And, using a top-down capillary force assisted interface transfer method to transfer the carbon-nanoparticle hybrid film layer to the surface of the support layer, so as to obtain the seawate...

Embodiment 1

[0079] 1. Aminated carbon nanotubes with a volume of 10ml and a mass ratio of 0.5:2 (amino ratio 1%, carbon nanotube length 100nm) and hydroxylated graphene oxide (hydroxyl ratio 1.5%, the size of graphene is 300nm ) into 100ml of ethanol solution, and ultrasonically disperse for 2h to obtain a uniformly dispersed carbon-based material dispersion of 0.1mg / ml;

[0080] 2. Transfer the carbon-based material dispersion obtained in step 1 to the water surface by spraying and subsequent peristaltic injection. In order to ensure the uniformity of the film material, the spraying rate is 25mL / min, and peristaltic injection is performed after 1min. The injection rate is 1mL / min, and finally pump out the excess ethanol as soon as possible, the pumping rate is 1mL / min;

[0081] 3. Extrude the loose film obtained in the solution step 2 by capillary extrusion to form a layer of uniform, dense, stable and orderly carbon-based material film. The size of the capillary force affects the compac...

Embodiment 2

[0087] 1. Carboxylated carbon nanotubes with a volume of 20ml and a mass ratio of 1:2 (carboxyl ratio 1.5%, carbon nanotube length 500nm) and carboxylated graphene oxide (hydroxyl ratio 1%, graphene size 1μm ) into 200ml of ethanol solution, and ultrasonically disperse for 2h to obtain a uniformly dispersed carbon-based material dispersion with a concentration of 0.5mg / ml;

[0088] 2. Transfer the carbon-based material dispersion obtained in step 1 to the water surface by spraying and subsequent peristaltic injection. In order to ensure the uniformity of the film material, the spraying rate is 35mL / min, and peristaltic injection is performed after 1min. The injection rate is 4mL / min, and finally pumped to get rid of excess ethanol as soon as possible, the pumping rate is 3mL / min;

[0089] 3. Extrude the loose film obtained in the solution step 2 by capillary extrusion to form a layer of uniform, dense, stable and orderly carbon-based material film. The size of the capillary fo...

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Abstract

The invention discloses a seawater desalination micro-nano membrane material, its preparation method and application. The seawater desalination micro-nano membrane material includes a support layer and a carbon-nanoparticle hybrid film layer arranged on the support layer. The preparation method includes: transferring the carbon-based material dispersion to the liquid surface of the second liquid phase system, and then performing capillary extrusion to form a carbon-based material film layer; and then transferring the carbon-based material film layer to the nanoparticle solution system , and carried out evaporation deposition, so that multiple nanoparticles are deposited on the carbon-based material film layer to form a carbon-nanoparticle hybrid film layer, which is then transferred to the surface of the support layer by capillary force-assisted interface transfer method to obtain seawater Dilute the micro-nano membrane material. The seawater desalination membrane material of the present invention has the advantages of high desalination rate, high retention rate, antibacterial, etc., and at the same time, the preparation process is simple, does not require expensive and complicated experimental equipment, and will not cause adverse effects on the surrounding environment, and can meet the needs of industrial production .

Description

technical field [0001] The invention relates to a film material, in particular to a seawater desalination micro-nano film material and its preparation method and application, belonging to the field of film material technology and seawater desalination. Background technique [0002] Water is the source of life and an essential resource to support economic and social development. With the rapid development of my country's economy and society and the continuous advancement of urbanization, the shortage of total water resources and the contradiction between time and space have become increasingly prominent. Especially in coastal areas and islands, the lack of water resources has become one of the bottlenecks restricting economic and social development. More than one billion people around the world lack fresh water. Relevant scholars estimate that by 2025, two-thirds of the world's population will face lack of fresh water. At the same time, seawater resources are very rich, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/10B01D67/00C02F1/44C02F103/08
CPCB01D69/10B01D69/105B01D67/0079C02F1/444C02F2103/08Y02A20/131
Inventor 陈涛肖鹏谷金翠张佳玮梁云
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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