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Nanofiber aerogel-based solar water evaporator and preparation method thereof

A nanofiber, water evaporator technology, applied in chemical instruments and methods, chemical characteristics of fibers, general water supply saving, etc., can solve the problems of complex preparation, poor thermal conductivity of solar water evaporators, etc. Light-to-heat conversion efficiency, light-weight effect

Active Publication Date: 2020-05-08
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a nanofiber airgel-based solar water evaporator and its preparation method to overcome the defects of poor thermal conductivity and complicated preparation of solar water evaporators in the prior art

Method used

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  • Nanofiber aerogel-based solar water evaporator and preparation method thereof
  • Nanofiber aerogel-based solar water evaporator and preparation method thereof
  • Nanofiber aerogel-based solar water evaporator and preparation method thereof

Examples

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Embodiment 1

[0045] The present embodiment provides a nanofiber aerogel-based solar water evaporator and a preparation method, and the specific steps are as follows:

[0046] Step 1): Preparation of polyamic acid nanofibers:

[0047]Dissolve 4.0048g of 4,4'-diaminodiphenyl ether in 50g of N,N-dimethylacetamide solvent, add 4.4278g of pyromellitic dianhydride, and react in an ice-water bath for 5h to obtain a polyamic acid spinning solution ; Add the prepared polyamic acid spinning solution into a syringe, carry out electrospinning, and electrospinning parameters: the voltage is 15kV, the bolus injection speed is 0.06mm / min, and the receiving speed is 100r / min to obtain polyamic acid nanofibers;

[0048] Step 2): Preparation of water-soluble polyamic acid:

[0049] Using N,N-dimethylacetamide as solvent, through condensation polymerization of 4,4'-diaminodiphenyl ether and terephthalic anhydride in an equimolar ratio in an ice-water bath to obtain a solid content of 15% of polyamic acid. ...

Embodiment 2

[0055] The difference between this example and Example 1 is that the amount of pyrrole monomer added dropwise in step 4) is 300 mg, and the rest are the same as in Example 1. That is, 300 mg of pyrrole monomer solution was added dropwise to the surface of the polyimide nanofiber aerogel with a surface size of 2cm×2cm and a height of 1cm to obtain a nanofiber aerogel-based solar water evaporator, denoted as PI-PPy-2 .

Embodiment 3

[0057] The difference between this example and Example 1 is that the amount of pyrrole monomer added dropwise in step 4) is 500 mg, and the rest are the same as in Example 1. That is, 500 mg of pyrrole monomer solution was added dropwise to the surface of the polyimide nanofiber aerogel with a surface size of 2cm×2cm and a height of 1cm to obtain a nanofiber aerogel-based solar water evaporator, denoted as PI-PPy-3 .

[0058] figure 1 The water loss weight-time relationship curve of the nanofiber aerogel-based solar water evaporator prepared for Examples 1-3, wherein the water weight loss of PI-PPy-3 is the largest, followed by PI-PPy-2, and the least is PI -PPy-1, indicating that PI-PPy-3 has the best evaporation effect. Because the more water loses weight, the more water vapor is produced during the evaporation process, and the higher the evaporation efficiency is. (Place the sample in a beaker with water, place it under a solar simulator, use an electronic balance to ca...

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Abstract

The invention relates to a nanofiber aerogel-based solar water evaporator and a preparation method thereof. The method comprises the following steps: mixing and dispersing polyamic acid nanofibers andwater-soluble polyamic acid, freezing the dispersion liquid, carrying out freeze-drying and thermal imidization on the obtained dispersion liquid, dipping the obtained polyimide nanofiber aerogel inan initiator solution, and dropwise adding a pyrrole monomer solution to the surface of the aerogel to carry out polymerization reaction. The method is simple in preparation process and low in cost; the prepared solar water evaporator has the advantages of light density, low heat conductivity, high photo-thermal conversion efficiency and the like, and is a good solar water evaporation device.

Description

technical field [0001] The invention belongs to the field of photothermal conversion materials and preparation thereof, and particularly relates to a nanofiber aerogel-based solar water evaporator and a preparation method thereof. Background technique [0002] With the increasingly serious problems of uneven distribution of water sources and water environment pollution, water shortage has become a global problem that needs to be solved urgently. In order to solve this problem, great efforts have been made to find a practical and effective solution. Solar water evaporation is considered as a green and renewable water purification technology, which can effectively alleviate the current severe situation of water shortage. It is the most common solar energy collection and conversion technology in the world. [0003] So far, two materials are commonly used to realize solar water evaporation devices. One is noble metal nanoparticles, such as gold nanoparticles, which absorb inci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/36C08J9/28C08L79/08C08G73/06C08G73/10D01F6/74C02F1/14
CPCC08J9/36C08J9/28C08G73/0611C08G73/1071C08G73/105D01F6/74C02F1/14C08J2379/08C08J2479/08C08J2479/04C08J2201/0484C08J2205/026Y02A20/212
Inventor 樊玮杨帆刘天西赵兴宇田婧
Owner DONGHUA UNIV
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