A composite thin film with both light-to-heat conversion and thermal energy storage and release functions and its preparation method

A composite thin film and light-to-heat conversion technology, which is applied in the direction of heat exchange materials, chemical instruments and methods, can solve the problems of easy leakage, low light-to-heat conversion efficiency, high packaging requirements, etc., to prevent leakage and aging, light-to-heat conversion Effects of low efficiency and small temperature range

Active Publication Date: 2018-03-06
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of organic phase change materials such as low light-to-heat conversion efficiency, easy leakage, and high packaging requirements, and to provide a composite film with both light-to-heat conversion and thermal energy storage and release functions and its preparation method. The surface plasmon resonance effect of nano-gold and the heat storage and release characteristics of phase change materials enable the composite phase change film to have the functions of light-to-heat conversion and thermal energy storage and release, and at the same time realize the effective packaging of organic phase change materials. Obtained a composite film and preparation method with both light-to-heat conversion and thermal energy storage and release functions

Method used

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  • A composite thin film with both light-to-heat conversion and thermal energy storage and release functions and its preparation method
  • A composite thin film with both light-to-heat conversion and thermal energy storage and release functions and its preparation method
  • A composite thin film with both light-to-heat conversion and thermal energy storage and release functions and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0034] In this embodiment, the composite film with both photothermal conversion and thermal energy storage and release functions uses polyvinyl alcohol as the main material of the film, nano-gold particles as the photothermal conversion material, self-assembled and filled with organic phase change material and evaporated water. obtained from a solvent, wherein the solid content of the organic phase change material PEG2000 is 5%.

[0035] In this example, the composite film with the functions of light-to-heat conversion and thermal energy storage and release is prepared according to the following method:

[0036] a. Preparation of gold nanoparticles

[0037] Add 1.25mL of 0.1M chloroauric acid aqueous solution into 50mL of ultrapure water, stir and heat to boiling, then add 750μL of 10% trisodium citrate aqueous solution, continue to reflux at 95°C for 0.5 hours, stop Stir and cool to room temperature to obtain a gold nanoparticle solution, which is stored in a refrigerator at 4...

Embodiment 2

[0047] The preparation method of the composite film of this embodiment is the same as that of Example 1, the amount of the added nano-gold particle solution is 10mL, the difference is that the added organic phase change material is 3.33mL of PEG2000 aqueous solution with a mass fraction of 20%. The solid content of PEG2000 in the obtained film was 40%.

[0048] After testing, when PEG2000 is used as the organic phase change material in Examples 1 and 2, the phase transition temperature of the obtained composite film is about 51-55°C.

[0049] Figure 4 It is an optical photo of the composite film prepared in this embodiment to prevent leakage. The upper figure is the original PEG2000 material, and the lower figure is the composite phase change energy storage material (PEG / PVA / Au) prepared in this embodiment. It can be seen from the figure , when the temperature of the hot stage gradually increased from 20°C to 80°C, the original PEG2000 material gradually melted and leaked, t...

Embodiment 3

[0053] The preparation method of this example is the same as that of Example 1, the amount of the added nano-gold particle solution is 10mL, the difference is that the organic phase change material is PEG1000, the added amount is 2.63mL of PEG1000 aqueous solution with a mass fraction of 2%, and the mass fraction is 5.55mL of 2% PEG1000 aqueous solution, 1.25mL of 20% PEG1000 aqueous solution by mass fraction, 3.33mL of 20% PEG1000 aqueous solution by mass fraction, the solid content of PEG1000 in the obtained composite phase change material is 5%, 10%, 20% respectively and 40%. After testing, when PEG1000 is used as the organic phase change material in this embodiment, the phase transition temperature of the obtained composite film is about 35-40°C.

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Abstract

The invention discloses a composite film with photothermal conversion and heat energy storage / release functions and a preparation method thereof. The composite film is prepared by carrying out self-assembly on a main body material polyvinyl alcohol by using a trace amount of gold nanoparticles as a photothermal conversion material and adding an organic phase-change material. According to the composite film with photothermal conversion and heat energy storage / release functions, by utilizing the surface plasma resonance effect of the filled nano gold and the heat storage / heat release characteristics of the phase-change material, the composite phase-change film has the functions of photothermal conversion and heat energy storage / release, and effectively solves the problem of leakage in the organic phase-change material. The preparation method is simple to operate and accessible in raw materials, can be prepared in common chemical laboratories, and thus, can be easily popularized.

Description

1. Technical field [0001] The invention relates to a film material and a preparation method thereof, in particular to a composite film with functions of photothermal conversion and thermal energy storage and release, and a preparation method thereof. 2. Background technology [0002] In today's social production process, energy, as an important support for the modern economy, is an important basis for the survival and development of human society, and occupies an important position in the process of promoting economic and social development. Recently, the economic development level of countries and regions has been constrained by energy supply and security systems. How to achieve long-term and effective sustainable energy development has always been an important part of the country's future development planning strategy. However, with the massive use of energy resources, the total energy consumption has continued to grow, and the resulting environmental pollution and resulti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L29/04C08L71/08C08K3/08C08J5/18C09K5/06
CPCC08J5/18C08J2329/04C08J2471/08C08L29/04C08L2203/16C09K5/063C08L71/00C08K3/08
Inventor 张忠平张淑东王振洋尚蒙娅
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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