A seawater evaporation desalination membrane material, its preparation method and application

Abstract

The invention discloses a seawater evaporation desalination membrane material, its preparation method and application. The seawater evaporation and desalination membrane material includes a support layer and a polymer-nanoparticle composite film layer arranged on the support layer, and the polymer-nanoparticle composite film layer includes a polymer film layer and a composite film layer with the polymer film. Composite nanoparticles. The preparation method comprises: contacting the support layer with an oxidant solution, a polymer material solution and a nanoparticle material solution in sequence to react to obtain a seawater evaporation desalination membrane material. The seawater evaporation and desalination membrane material of the present invention has the advantages of high desalination rate, high retention rate, antibacterial, high mechanical properties, etc., and its preparation process is simple, low in requirements on environmental factors, low in cost, does not require expensive and complicated experimental equipment, and does not require It will cause adverse effects on the surrounding environment and can meet the needs of industrial production.

Description

A kind of seawater evaporation and desalination membrane material, its preparation method and application technical field The present invention relates to a kind of film material, particularly relate to a kind of seawater evaporation desalination film material and preparation method thereof and The application belongs to the technical field of membrane materials. Background technique [0002] Water is the source of life and a necessary resource to support economic and social development. With the rapid development of my country's economy and society With the continuous advancement of development and urbanization, the shortage of total water resources and the contradiction between time and space matching 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 worldwide lack fresh water, related Scholars estimate ...

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Problems solved by technology

[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 more complicated

[0007] Wang Peng and others from King Abdullah University of Science and Technology have developed a 3D structure seawater evaporator by suction filtering the mixture of graphene oxide and carbon tubes, but its efficiency can only reach 100% under one sun. 1.59kg / m 2 / h

[0008] 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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