Carbon-based photo-thermal converting thin film, preparation method and application thereof and photo-thermal converting device

A light-to-heat conversion and thin-film technology, which is applied in the field of composite materials, can solve the problems of complex material assembly process, easy agglomeration, and high price, and achieve the effect of high-efficiency light-to-heat conversion performance and broad application prospects

Active Publication Date: 2017-09-01
宁波智正伟盈信息科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the main photothermal steam conversion materials mainly include precious metal nanofluids such as gold and silver, and macroscopic materials assembled by these substances, but these materials have disadvantages such as high price, easy agglomeration, and complicated material assembly processes, which limit their practical applications.
[0004] In addition to noble metals, copper sulfide, carbon nanotubes, carbon black and other inorganic nanomaterials also have excellent photothermal conversion properties, but most of these materials are used as dispersion liquids in photothermal conversion devices. Bubbles of hot vapor need to travel through the entire solution to escape, causing most of the unnecessary heat loss
In addition, there are also some reports of macroscopic bodies assembled from inorganic nanoparticles, but these macroscopic bodies only rely on physical adsorption connections and do not have good reusability.

Method used

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  • Carbon-based photo-thermal converting thin film, preparation method and application thereof and photo-thermal converting device
  • Carbon-based photo-thermal converting thin film, preparation method and application thereof and photo-thermal converting device
  • Carbon-based photo-thermal converting thin film, preparation method and application thereof and photo-thermal converting device

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preparation example Construction

[0037] The invention provides a method for preparing a carbon-based light-to-heat conversion film, comprising the following steps:

[0038] After mixing carbon black and ferrous acetate, microwave treatment is carried out under airtight conditions to obtain expanded carbon black;

[0039] Dispersing the expanded carbon black and the crosslinking agent in water to obtain an expanded carbon black dispersion;

[0040] A mixed cellulose filter membrane is used to filter out the moisture in the swollen carbon black dispersion, and the swelled carbon black and the mixed cellulose undergo a cross-linking reaction to obtain a carbon-based light-to-heat conversion film; the mixed cellulose filter membrane has a surface band There are amino groups.

[0041] In the invention, after mixing carbon black and ferrous acetate, microwave treatment is carried out under airtight conditions to obtain expanded carbon black. In the present invention, the mass ratio of the carbon black to ferrous ...

Embodiment 1

[0062] Pour 0.1156g of carbon black and 0.1156g of ferrous acetate into the grinder for grinding, then place the mixture in a sealed environment and put it into a microwave reactor at 900W, 300°C for 10s to obtain expanded carbon black;

[0063] Add 0.525g of polyethyleneimine and 0.015g of expanded carbon black to 2ml of deionized water, and ultrasonically disperse the mixture in an ultrasonic cleaner for 1 hour to obtain a uniform dispersion; subsequently, filter the dispersion under reduced pressure to a pore size of 0.45um The mixed cellulose filter membrane (membrane area is 20cm 2 ) to obtain a carbon-based light-to-heat conversion film (ECB / MCE).

[0064] Use ultraviolet spectrometer to detect the carbon black before and after microwave treatment, the obtained results are as follows figure 1 shown; according to figure 1 It can be seen that the light transmittance of expanded carbon black to 200-1500nm is less than 3%, and the reflectivity of the entire sunlight is les...

Embodiment 2

[0069] Cellulose acetate paper (thickness 0.5mm) was used to wrap polystyrene foam (thickness 1.0cm), and the carbon-based light-to-heat conversion film prepared in Example 1 was placed on the upper surface of the cellulose acetate paper to obtain a light-to-heat conversion device (NES) .

[0070] The schematic diagram of the process for preparing the photothermal conversion device is as follows: Figure 5 shown;

[0071] Photothermal conversion performance test:

[0072] Experiment 1: Place the carbon-based light-to-heat conversion film (ECB / MCE) prepared in Example 1 and the light-to-heat conversion device (NES) prepared in this example on the water surface to conduct a light-to-heat conversion test, and control the light intensity to 1kW / m 2 , to detect the temperature and quality changes of water, the obtained results are as follows Image 6 as shown, Image 6 The quality and temperature change diagram of water when using carbon-based light-to-heat conversion film an...

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Abstract

The invention provides a carbon-based photo-thermal converting thin film, a preparation method and application thereof and a photo-thermal converting device. According to the preparation method, expanded carbon black is prepared through microwave treatment, so that photo-thermal converting performance of the expanded carbon black is improved; then a crosslinking agent is utilized to enable carboxy groups on the surface of the expanded carbon black and amino groups on the surface of mixed cellulose to generate crosslinking reaction to generate amido bonds, so that chemical bond connection between the expanded carbon black and a mixed cellulose filter membrane is achieved; thus, mechanical stability of the carbon-based photo-thermal converting thin film is improved, and the carbon-based photo-thermal converting thin film can be used repeatedly. When the carbon-based photo-thermal converting thin film disclosed by the invention is assembled into the photo-thermal converting device, a photo-thermal converting efficiency of the obtained photo-thermal converting device can reach 85% under 1kW/m<2> illumination condition, and the obtained photo-thermal converting device can still keep stable photo-thermal performance after 14 times of repeated tests.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a carbon-based light-to-heat conversion film, a preparation method and application thereof, and a light-to-heat conversion device. Background technique [0002] In modern society, due to the increasing energy crisis and environmental pollution, solar energy, as a renewable clean energy, has attracted more and more attention from the society. The surface plasmon resonance effect of nanoparticles can generate local heat, which can promote the efficient conversion of solar energy into steam energy, which is very different from the traditional steam generation by heating the whole liquid, and the generation of local heat energy can reduce heat Loss, to achieve high-efficiency conversion of solar energy and steam energy. This technology has broad application prospects, such as: seawater desalination, induced power generation, liquid fractionation, medical device disinfect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L1/02C08L1/12C08L79/02C08K7/24F24J2/46
CPCC08J5/18C08J2301/02C08J2301/12C08J2479/02C08L1/02C08L1/12C08L2203/16C08L79/02C08K7/24C08L33/26
Inventor 王贤保侯保飞朱祥崔振起刘行航王建颖梅涛李金华
Owner 宁波智正伟盈信息科技有限公司
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