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Preparation method of seawater desalination material based on polyurethane foam

A technology of polyurethane foam and polyaniline, applied in chemical instruments and methods, seawater treatment, general water supply saving, etc., can solve the problems of low desalination efficiency of seawater desalination materials, etc. The effect of reducing tangential resistance

Active Publication Date: 2019-11-29
HARBIN INST OF TECH AT WEIHAI +1
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of low desalination efficiency of the seawater desalination material prepared by the existing method using photothermal conversion, and to provide a preparation method of the seawater desalination material based on polyurethane foam

Method used

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  • Preparation method of seawater desalination material based on polyurethane foam

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specific Embodiment approach 1

[0014] Embodiment 1: This embodiment is a preparation method of a polyurethane foam-based seawater desalination material, which is specifically prepared according to the following steps:

[0015] 1. Preparation of ammonium persulfate (A) and aniline (B) solutions: First, dissolve 10-15 g of ammonium persulfate in 300-500 ml of deionized water, and record it as solution A. Then, add 5-10 ml of aniline into 600-1000 ml of deionized water, and ultrasonically treat it for 90-120 minutes to dissolve it completely, and record it as solution B;

[0016] 2. Preparation of polyaniline powder: under stirring, add solution A and solution B in (1) into a beaker containing 3 L of 1.0-2.0M HCl in turn, react for 5 minutes and then filter. Then, wash with deionized water and filter 3 times to obtain polyaniline powder. Finally, put the obtained polyaniline powder into an oven at 50-70°C and dry for 48-96 h to obtain polyaniline powder;

[0017] 3. Preparation of polyaniline solution: Add 0...

specific Embodiment approach 2

[0025] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the polyaniline in step 3 has a mass of 0.5-1.5 g. . Others are the same as the first embodiment.

specific Embodiment approach 3

[0026] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the quality of the polyvinyl alcohol powder described in Step 4 is 25-35 g. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a preparation method of a material, specifically to a preparation method of a seawater desalination material based on polyurethane foam. The invention aims to solve the problem of low desalination efficiency of seawater desalination material prepared by utilizing conventional photothermal conversion methods. The preparation method comprises the following steps: 1, preparing an ammonium persulfate solution and an aniline solution; 2, preparing polyaniline powder; 3, preparing a polyaniline solution; 4, preparing a polyvinyl alcohol solution; 5, preparing a crude productof the seawater desalination material based on the polyurethane foam; and 6, carrying out optimization treatment to obtain the seawater desalination material based on the polyurethane foam. The prepared seawater desalination material can fully utilize the pore diameter structure of a polyurethane foam material and the nano-channel of a polyvinyl alcohol gel, effectively reduces latent heat of evaporation of water, and greatly improves sea water desalination efficiency. The seawater desalination material has a high seawater evaporation rate (2.0 kg / m<2> / h) and high desalination efficiency (99.9%), which is increased by 25% compared with traditional photothermal conversion seawater desalination materials.

Description

technical field [0001] The invention relates to a preparation method of seawater desalination material. Background technique [0002] Demand for freshwater resources is increasing due to rising population growth rates and improved living standards, as well as expansion of industrial and agricultural activities. Existing fresh water resources such as rivers and groundwater are limited. Facing the ever-increasing demand for fresh water, many cities are facing a water shortage crisis. However, the earth is rich in water resources, but the seawater has a high salt content, which is not suitable for human use, nor is it suitable for industrial and agricultural use. In order to realize the desalination of seawater to produce fresh water, over the years, a variety of desalination technologies have been developed on the basis of technologies such as multi-effect evaporation, membrane separation, freezing, and electrodialysis, among which the two most important technologies are base...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08L29/04C08L79/02C08J9/28C02F1/14C02F103/08
CPCC08J9/28C02F1/048C02F1/14C08J2375/04C08J2429/04C08J2479/02C02F2103/08Y02A20/142Y02A20/212Y02A20/124
Inventor 程喜全黄军辉王凯张瑛洁
Owner HARBIN INST OF TECH AT WEIHAI
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