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Preparation method of electrostatically-spun seawater desalination membrane with self-floating structure

An electrospinning and self-floating technology, applied in electrospinning, chemical instruments and methods, seawater treatment, etc., to achieve the effect of reducing the difficulty of the production process, good desalination effect, and good thermal stability

Pending Publication Date: 2021-10-29
SHANGHAI UNIV OF ENG SCI
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Therefore, the present application has no report on nanofiber membranes with self-floating structure, electrospinning process, doped carbon materials and utilizing solar energy for seawater desalination

Method used

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Embodiment 1

[0031] A preparation method of an electrospun seawater desalination membrane with a self-floating structure, the thickness of the electrospun seawater desalination membrane with a self-floating structure is 0.5mm, and the thickness ratio of the polyacrylonitrile layer to the polystyrene layer is 1: 1.5, the amount of carbon material added is 0.75wt%, and the average desalination efficiency is 994g / (m 2 h), the surface temperature of the fiber membrane reaches 95° C. after two hours of photothermal evaporation.

[0032] Firstly, polystyrene spinning solution and carbon-doped polyacrylonitrile spinning solution were prepared; then, carbon-doped polyacrylonitrile nanofiber membrane was prepared by electrospinning process; finally, the polyacrylonitrile nanofiber membrane was continued Spinning, preparing a polystyrene nanofiber membrane, and drying it to finally obtain an electrospun seawater desalination membrane with a self-floating structure.

[0033]A method for preparing an...

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Abstract

The invention discloses a preparation method of an electrostatically-spun seawater desalination membrane with a self-floating structure. The preparation method comprises the following steps: preparing a polystyrene spinning solution; preparing a carbon material-doped polyacrylonitrile spinning solution; preparing a carbon material-doped polyacrylonitrile nanofiber membrane; and preparing a polystyrene nanofiber membrane. The electrostatically-spun seawater desalination membrane with the self-floating structure is prepared, and a carbon material and a solar seawater desalination technology are combined, so self-supporting of the membrane in a seawater desalination process is realized, and the effects that the seawater desalination membrane can be recycled and is convenient to transport are realized; and sunlight is converted into heat energy required by seawater desalination by utilizing high heat transfer performance and heat conductivity of the carbon material, so local high temperature is formed on the surface of the membrane, and the purpose of improving the seawater desalination efficiency is achieved. The prepared electrostatically-spun seawater desalination membrane with the self-floating structure has the advantages of self-supporting, light weight and high seawater desalination efficiency.

Description

technical field [0001] The invention belongs to the technical field of preparation of functional membranes, and in particular relates to a preparation method of an electrospun seawater desalination membrane with a self-floating structure. Background technique [0002] Fresh water is one of the basic materials for the survival and development of human society. Currently, the total amount of fresh water in the ocean accounts for 97% of the total amount of the earth. But seawater is not suitable for agricultural irrigation, nor can it be directly used as domestic and industrial water. Therefore, there is a need for suitable ways to desalinate seawater. The existing seawater desalination methods can be divided into direct method and indirect method. The commonly used seawater desalination methods mainly include multi-stage evaporation, multi-effect distillation, reverse osmosis membrane method, etc. A large amount of conventional energy will be lost in the process of these fres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D69/02B01D69/10B01D61/36C02F1/14C02F1/44D04H1/728D01D5/00C02F103/08
CPCB01D67/0079B01D69/02B01D69/10B01D61/364C02F1/14C02F1/447D04H1/728D01D5/003D01D5/0084C02F2103/08B01D2325/22Y02A20/212Y02A20/124Y02A20/131Y02A20/142
Inventor 宫婷唐焓桐江振林徐晨雪尤全天
Owner SHANGHAI UNIV OF ENG SCI
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