Vanadium dioxide-based thermochromic composite film and preparation method thereof

A vanadium dioxide-based thermal and vanadium dioxide-based technology, which is applied in the field of vanadium dioxide-based thermochromic composite films and their preparation, can solve the problem of unsightly brown-yellow films, lack of regulation in the visible light band, and poor product promotion and promotion. impact, etc.

Pending Publication Date: 2021-07-30
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, vanadium dioxide smart windows still have the following deficiencies: (1) It has a high ability to adjust the infrared band of sunlight, but has almost no adjustment effect on the visible light band, and the energy of the visible light band accounts for about 50% of the total energy of sunlight 44%, which makes it slightly insufficient in the adjustment ability of the entire solar light band; (2) Since the absorption of vanadium dioxide in the visible light band does not change significantly before and after the phase transition, it is impossible to use this adjustment to produce sufficient vision (color) (3) It has a strong absorption effect on short-wavelength visible light, resulting in an unattractive brown-yellow film.
So far, there is no mature technology to fundamentally solve the above-mentioned problems

Method used

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  • Vanadium dioxide-based thermochromic composite film and preparation method thereof
  • Vanadium dioxide-based thermochromic composite film and preparation method thereof
  • Vanadium dioxide-based thermochromic composite film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Weigh 0.05g of vanadium dioxide nanoparticles (33nm in particle size) and ultrasonically disperse them in 8g of ethanol to form a dispersion, then add 0.6g of polyvinyl butyral resin therein, form a uniform slurry by magnetic stirring, and use a roller The method of coating is to apply it on the substrate (glass, etc.), and place it at room temperature for 1 hour until it is cured (it can also be heated in an oven to accelerate its curing), and a vanadium dioxide-based thermally induced phase change film is obtained, which is brownish yellow. The thickness is 4 μm.

[0044] Add the monomer of polydiacetylene, a thermochromic polymer material, into chloroform solvent, and ultrasonically disperse for 2 hours to obtain a 2.5wt% transparent solution, which is then spin-coated (rotating speed is 2000r / min during spin-coating) onto On the pre-prepared vanadium dioxide-based thermochromic phase change film, after drying, induce polymerization by ultraviolet light with a wavele...

Embodiment 2

[0046] The vanadium dioxide-based thermally induced phase change film was prepared according to the method in Example 1, with a thickness of 4 μm.

[0047] Dissolve the monomer of the thermochromic polymer material polydiacetylene with chloroform, obtain a 1.5wt% transparent dispersion by ultrasonic, and spin-coat it (1000r / min during spin-coating) onto the pre-prepared On the vanadium dioxide-based thermochromic phase change film, after it is dried, it is induced to polymerize by ultraviolet light with a wavelength of 254nm for 30s to obtain a vanadium dioxide-based thermochromic composite film. After heating, the color development has the effect of changing from blue purple to red .

Embodiment 3

[0049] The vanadium dioxide-based thermally induced phase change film was prepared according to the method in Example 1, with a thickness of 4 μm.

[0050] Dissolve the monomer of the thermochromic polymer material polydiacetylene with chloroform, obtain a 2.5wt% transparent dispersion by ultrasonic, and spin-coat it (rotating speed is 500r / min during spin-coating) onto the pre-prepared On the vanadium dioxide-based thermochromic phase change film, after it is dried, it is irradiated with ultraviolet light with a wavelength of 254nm to induce polymerization for 5s to obtain a vanadium dioxide-based thermochromic composite film. After heating, the color development has the effect of changing from purple to red.

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Abstract

The invention provides a vanadium dioxide-based thermochromic composite film and a preparation method thereof, and belongs to the technical field of building energy conservation. The preparation method of the vanadium dioxide-based thermochromic composite film provided by the invention comprises the following steps: 1) preparing vanadium dioxide-based thermochromic film slurry; (2) preparing thermochromic polymer slurry; and 3) preparing the composite membrane. The preparation scheme adopted by the invention is simple, is easy for mass production, can be used in the aspects of thermochromic intelligent energy-saving films, intelligent energy-saving windows and the like for buildings and vehicles, and can realize rapid popularization of the vanadium dioxide-based thermochromic energy-saving window application technology. The composite film provided by the invention has an obvious indication effect, the problem that the color of the vanadium dioxide-based thermochromic composite film is not attractive can be improved, and the material stability and the display effect of the composite film are improved.

Description

technical field [0001] The invention relates to the technical field of building energy conservation, in particular to a vanadium dioxide-based thermochromic composite film and a preparation method thereof. Background technique [0002] With the rapid development of the economy and society, the demand for energy has risen sharply, and the global energy shortage has become increasingly serious. According to statistics, building energy consumption accounts for 30% to 40% of the total energy consumption in society. Promoting building energy conservation is one of the key measures to achieve sustainable development. one. Building services such as air conditioning, heating and ventilation are the main components of building energy consumption, accounting for 50% of the total building energy consumption. However, only 50% of the energy used in air conditioning and heating is effectively used, and the rest is lost through heat exchange with the outside world. As the main channel f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/34C09D129/14C09D7/61C09D149/00C09D5/26
CPCC03C17/3405C09D129/14C09D7/61C09D149/00C09D5/26C09D7/67C08K2201/011C03C2217/445C03C2217/475C03C2217/70C03C2218/118C08K3/22
Inventor 蒋绪川杨帅军王彬彬聂永王程王驰元郭小丹李良
Owner UNIV OF JINAN
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