Intelligent window film with adjustable cold and warm tones and preparation method thereof

A technology for smart windows and films, applied in the field of smart windows, can solve problems such as the inability to realize the regulation of cool and warm colors, and achieve the effects of low production cost, short time required, and simple preparation process

Pending Publication Date: 2022-04-01
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

while the existing VO 2 Basic smart windows can only adjust the entry of solar radiation energy, and cannot realize the adjustment of warm and cold colors

Method used

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  • Intelligent window film with adjustable cold and warm tones and preparation method thereof
  • Intelligent window film with adjustable cold and warm tones and preparation method thereof
  • Intelligent window film with adjustable cold and warm tones and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A smart window film with adjustable warm and cold colors according to the present invention. The smart window film is located on the substrate PET, with a thickness of about 25 μm. Powder, monoclinic phase pure VO 2 It is prepared by mixing powder (phase transition temperature is 68°C), dispersant, binder and diluent, wherein the thermochromic powder is colorless and green, and the diluent has a volume ratio of 4: 1 xylene and butyl acetate mixture, the dispersant is DISPERBYK-110, and the binder is acrylic polyol resin.

[0038] The preparation method of the smart window film with adjustable warm and cold colors in this embodiment comprises the following steps:

[0039] (1) Preparation of slurry: 0.08g colorless and green thermosensitive color-changing powder (color change temperature is 45°C) and 0.8g VO 2 Mix the powder with 40g diluent (a mixture of xylene and butyl acetate with a volume ratio of 4:1) and ultrasonically disperse for 20min, then add 0.04g DISPERBYK...

Embodiment 2

[0045] A smart window film with adjustable warm and cold colors according to the present invention. The smart window film is located on the substrate PET, with a thickness of about 25 μm. powder, monoclinic phase VO 2 It is prepared by mixing powder (phase transition temperature is 68°C), dispersant, binder and diluent. Among them, the temperature-sensitive color-changing powder is a colorless and blue temperature-sensitive color-changing powder, and the diluent has a volume ratio of 4 : 1 xylene and butyl acetate mixture, the dispersant is DISPERBYK-110, the binder is acrylic polyol resin. VO used in this embodiment 2 The VO that powder and embodiment 1 adopt 2 The powder properties are the same.

[0046] The preparation method of the smart window film with adjustable warm and cold colors in this embodiment comprises the following steps:

[0047] (1) Preparation of slurry: 0.08g colorless and blue thermosensitive color-changing powder (color changing temperature is 45°C) ...

Embodiment 3

[0052] A smart window film with adjustable warm and cold colors according to the present invention. The smart window film is located on the substrate PET, with a thickness of about 100 μm. powder, monoclinic phase VO 2 It is prepared by mixing powder (phase transition temperature is 68°C), dispersant, binder and diluent. Among them, the temperature-sensitive color-changing powder is a colorless and blue temperature-sensitive color-changing powder, and the diluent has a volume ratio of 4 : 1 xylene and butyl acetate mixture, the dispersant is DISPERBYK-110, the binder is acrylic polyol resin.

[0053] The preparation method of the smart window film with adjustable warm and cold colors in this embodiment comprises the following steps:

[0054] (1) Preparation of slurry: 0.08g of colorless and blue thermosensitive color-changing powder (discoloration temperature is 30°C) and 0.4g of VO 2 Mix the powder with 12g diluent (a mixture of xylene and butyl acetate with a volume ratio ...

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Abstract

The invention relates to an intelligent window film with adjustable cold and warm tones, which is positioned on a substrate and is mainly prepared from VO2 powder, thermochromic powder, a diluent, an adhesive and a dispersing agent. The preparation method comprises the following steps: uniformly stirring and mixing the diluent, the adhesive, the dispersing agent, the VO2 powder and the thermochromic powder, and grinding and dispersing in a grinding machine to obtain slurry; and coating a substrate with the slurry by a blade coating, spraying or printing method, and drying to form the intelligent window film with adjustable cold and warm tones on the substrate. The VO2 nano powder and the thermochromic powder are compounded, dual adjustment is realized by utilizing the synergistic effect of high solar energy modulation capability of VO2 in a near-infrared band and the thermochromic powder in a visible light band, the energy-saving efficiency of the intelligent window film is greatly improved, the composite film can be reversibly converted among different colors at different temperatures, and the energy-saving effect of the intelligent window film is greatly improved. And the system has the performance of cold/warm tone conversion.

Description

technical field [0001] The invention belongs to the technical field of smart windows, and in particular relates to a smart window film with adjustable cool and warm tones and a preparation method thereof. Background technique [0002] With the rapid development of industrialization and urbanization, the global energy shortage problem is becoming more and more serious, and the environmental problems caused by excessive carbon emissions are getting worse. Energy saving and emission reduction have become the top priority of all countries in the world. It is estimated that building energy consumption accounts for about 30% of the total energy consumption of the society. Therefore, promoting building energy conservation and energy-saving renovation of existing buildings has become the focus of my country's energy-saving emission reduction and sustainable development. Windows are the main channel for heat exchange between buildings and the outside world. According to estimates, ab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04C08J5/18C09D133/00C09D127/12C09D7/61C09D5/26C08L67/02C03C17/00
CPCY02P20/10
Inventor 嵇海宁邹晓彤余希涛毛宇亮唐平华赵勇卢明应陶俊东
Owner XIANGTAN UNIV
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