Solar photo-thermal conversion composite film and preparation method thereof

A composite film and photothermal conversion technology, which is applied to the composite film with solar photothermal conversion performance and the field of preparation thereof, can solve the problems of easy decomposition and complicated preparation, and achieve the effects of easy availability of raw materials, simple operation and simple synthesis process.

Inactive Publication Date: 2020-02-04
HENAN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Organic compound photothermal conversion materials are often used to enhance the effect of laser photothermal therapy, mainly including organic dyes, conductive polymers and dopamine-melanin and other nanomaterials, but they are easy to decompose
Carbon-based nanomaterials are mainly divided into graphene-based nano-photothermal materials and carbon nanotube-based photothermal materials, and the preparation is relatively complicated.

Method used

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  • Solar photo-thermal conversion composite film and preparation method thereof
  • Solar photo-thermal conversion composite film and preparation method thereof
  • Solar photo-thermal conversion composite film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] In this embodiment, the light-to-heat conversion composite film is based on a white cellulose film, copper acetate is used as a copper source, and thiourea is used as a sulfur source, and the empty shell is vulcanized through adsorption of copper ions, vulcanization, self-assembly and Ostwald ripening. Copper nanoparticles grown on cellulose.

[0035] In this example, the light-to-heat conversion composite film is prepared according to the following method:

[0036]First, put the white cellulose film into hot water at 50°C for cleaning, then wash it with ultrapure water and absolute ethanol three times in sequence, and dry it under vacuum at 30°C for 12 hours before use. Prepare a 0.1M copper sulfate solution, immerse the cellulose film in the copper sulfate solution, and vibrate on a shaker for 24 hours. After the reaction, the cellulose film was taken out from the copper sulfate solution, washed several times with ultrapure water and absolute ethanol, and dried at 30...

Embodiment 2

[0041] The preparation method of this embodiment is the same as that of Example 1, except that the black cellulose film containing bamboo charcoal is selected as the substrate.

[0042] figure 1 The upper middle left (1) is an optical photo of a white cellulose-copper sulfide light-to-heat conversion composite film prepared on the basis of a black cellulose film. Figure 5 (4) is the thermogravimetric analysis diagram of the black cellulose-copper sulfide light-to-heat conversion composite film. It can be seen that the composite film has good thermal stability. Figure 6 Middle (1) is the time-temperature diagram of the black cellulose-copper sulfide light-to-heat conversion composite film under simulated solar irradiation, from Figure 6 can be obtained, at a power density of 1 kW m -2 Under the irradiation of simulated sunlight, the temperature of the black cellulose-copper sulfide composite film can be heated up to 70 °C.

Embodiment 3

[0044] The preparation method of this example is the same as that of Example 1, except that copper nitrate is used as the copper source and thioacetamide is used as the sulfur source to prepare a black cellulose-copper sulfide light-to-heat conversion composite film. The scanned picture is shown in Figure 7 Medium (1). After testing, the power density of the composite film is 1 kW m -2 Under the irradiation of simulated sunlight, the temperature can be warmed up to about 42 ℃.

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Abstract

The invention discloses a photo-thermal conversion composite film and a preparation method thereof, wherein the composite film is prepared by the steps of taking a cellulose film as a substrate, taking a semiconductor nano material with near-infrared absorption as a photo-thermal conversion material, and growing the photo-thermal conversion material on the surface of the cellulose film in situ through a solvothermal method. The solar photo-thermal conversion composite film has a rough porous surface, high absorption of incident light can be achieved through multiple scattering, meanwhile, semiconductor photo-thermal conversion nanoparticles are evenly dispersed on the surface of the cellulose film, and large-scale agglomeration is avoided; compared with a semiconductor block material, thephoto-thermal conversion composite film has efficient solar photo-thermal conversion performance. The used cellulose substrate film is wide in source, and the cost of the photo-thermal conversion nanoparticles is moderate; the preparation method of the composite film is simple, and the composite film can be prepared in general chemical laboratories and is easy to popularize; and the solar photo-thermal conversion composite film prepared through the method has wide application prospects in seawater desalination, sterilization and other aspects.

Description

technical field [0001] The invention relates to a film material and a preparation method thereof, in particular to a composite film with solar light-to-heat conversion performance and a preparation method thereof. Background technique [0002] In recent years, with the development of the economy, the demand for global energy has increased sharply, and the problem of energy shortage has become more and more serious. As an important support for the modern economy, energy is an important foundation for the survival and development of human society. play an important role in the process. Facing the prominent energy shortage problem, how to effectively use the inexhaustible and clean energy—solar energy is one of the effective means to solve energy problems, and at the same time, due to the environmental protection, cleanness and regeneration of solar energy, it avoids the pollution of the environment. Therefore, in the current increasingly stringent environmental protection si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/12C08L1/02C08K3/30
CPCC08J7/12C08J2301/02C08K2003/3009C08K2201/011
Inventor 尚蒙娅彭进邹文俊王仁杰
Owner HENAN UNIVERSITY OF TECHNOLOGY
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