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Graphene nanosheet porous photo-thermal conversion material as well as preparation method and application thereof

A graphene nanosheet, photothermal conversion technology, applied in chemical instruments and methods, separation methods, heating water/sewage treatment, etc., can solve problems such as hindering practical application, difficulty in dispersion, high cost, etc. Evaporation efficiency, good recycling effect

Active Publication Date: 2021-04-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, nanoscale precious metals such as gold and silver have been widely reported, but their further practical applications are hindered by their shortcomings such as expensive, difficult to disperse, and easy to agglomerate.
Nano-carbon materials such as carbon nanotubes, graphene and other materials also have good photothermal conversion performance, but the expensive cost has also become a development bottleneck. It is the purpose of the present invention to find a low-cost and high-performance photothermal conversion material

Method used

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  • Graphene nanosheet porous photo-thermal conversion material as well as preparation method and application thereof
  • Graphene nanosheet porous photo-thermal conversion material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] a. Add 0.5g of graphite particles (325 mesh size) into 50g of methyl acrylate, and disperse by ultrasonic, the ultrasonic power is 300W, the ultrasonic time is 30min, and then 0.05g of azobisisobutylene is added Nitrile (initiator) and 0.1 g of divinylbenzene (DVB, cross-linking agent), stir well;

[0044] b. Immerse the melamine sponge in water after hot pressing, squeeze out excess water after taking out, and immerse in the solution obtained in the above a. The volume ratio of the immersion liquid and the melamine sponge is 3:1, and the time of the immersion treatment is 5min. The modified solution absorbed in the melamine sponge was extruded by manual extrusion until no liquid dripping was observed with the naked eye within 30s, the extrusion treatment was completed, and the process was repeated 3 times;

[0045] c. Put the sponge into the oven, raise it to 80°C for heating, curing and polymerization for 2h;

[0046] Photothermal conversion performance test: The obt...

Embodiment 2

[0050] a. Add 0.85 g of graphite particles (with a particle size of 325 mesh) into 50 g of methyl acrylate, and disperse them by ultrasonic. The ultrasonic power is 300 W, and the ultrasonic time is 30 min. Then add the azobisisobutyronitrile (initiator) of 0.05g and the divinylbenzene (DVB, crosslinking agent) of 0.1g, stir;

[0051] b. Hot-press the melamine sponge and immerse it in water, squeeze out the excess water after taking it out, and immerse it in the solution obtained in the above a. The volume ratio of the immersion liquid to the melamine sponge is 3:1, and the time for immersion treatment is 5 minutes. Squeeze out the modified solution absorbed in the melamine sponge by manual extrusion until the liquid dripping is not observed with the naked eye within 30s, and the extrusion process is completed, and the process is repeated 3 times;

[0052] c. Put the sponge into the oven, raise it to 80°C for heating, curing and polymerization for 2 hours;

[0053] Light-to-h...

Embodiment 3

[0055] a. Add 0.85g of graphite particles (325 mesh particle size) into the mixed monomer of 5g lauryl acrylate and 50g styrene, and disperse by ultrasonic, the ultrasonic power is 300W, the ultrasonic time is 90min, and then add 0.2g of lauroyl peroxide (initiator) and 0.17g of tetraethyloxysilane (TEOS, cross-linking agent) are stirred evenly;

[0056] b. Immerse the polyvinyl alcohol sponge in water, squeeze out the excess water after taking it out, and immerse it in the solution obtained in the above a. The volume ratio of the immersion liquid to the sponge is 3:1, and the immersion treatment time is 5 minutes. Squeeze out the modified solution absorbed in the sponge by manual extrusion until no dripping of the liquid is observed with the naked eye within 30s, complete the extrusion process, and repeat the process 3 times;

[0057] c. Place the sponge under a UV lamp for photocuring and polymerization for 1 hour;

[0058] Light-to-heat conversion performance test: place t...

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Abstract

The invention discloses a graphene nanosheet porous photo-thermal conversion material as well as a preparation method and application thereof. The preparation method comprises the following steps: immersing a hydrophilic porous material in water, immersing the hydrophilic porous material in a polymer monomer oil phase dispersed with graphite powder, coating the water-containing surface of the porous material with graphene nanosheets, and fixing the graphene nanosheets on the surface layer of the porous material by polymerization of the polymer monomer on the outer layer, thereby obtaining the graphene nanosheet photo-thermal conversion material. According to the material, sunlight is efficiently converted into heat by utilizing the pore structure of the porous material and the light absorption and heat conversion properties of the graphene nanosheets, so that rapid evaporation of a small amount of local water or an organic solvent is realized, and the overall evaporation efficiency is improved. The raw materials used in the method are low in price and easy to operate, and the method has the advantages of being capable of being recycled on a large scale and good in recycling stability and is expected to be applied to seawater evaporation, industrial and domestic sewage treatment, rapid solvent evaporation, heavy metal recovery and the like.

Description

technical field [0001] The invention relates to the technical field of environmental functional materials, in particular to a graphene nanosheet porous photothermal conversion material, a preparation method and an application thereof. Background technique [0002] In recent years, the environmental problems caused by the energy crisis and the traditional energy industry have become increasingly serious, and the development and utilization of new energy is the development direction of the industry. Among them, solar energy has received extensive attention as a clean and renewable energy. High-efficiency and low-cost solar energy conversion and utilization methods are the goals pursued by researchers. At present, the field of solar photothermal conversion is a research hotspot, and plasmonic metal nanoparticles, semiconductor materials, carbon materials, polymer materials and other light-absorbing and heat-converting materials have been developed for seawater desalination, ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/40C08F220/14C08F212/36C08F2/44C08K3/04C08K7/00C02F1/04B01D1/00C08L61/28C02F103/08
CPCC08J9/405C08F220/14C08F2/44C08K3/042C08K7/00C02F1/04B01D1/00C02F2103/08C08K2201/011C08J2361/28C08F212/36Y02A20/124
Inventor 陈婧王晓鹏张韬毅王霭廉计文希许宁
Owner CHINA PETROLEUM & CHEM CORP
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