A highly sensitive mechanically regulated smart window film and its preparation method

A smart window and mechanical technology, applied in the field of smart windows, can solve the problems of lack of multi-band control ability, low binding force, low optical adjustment sensitivity, etc.

Active Publication Date: 2021-07-06
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problems of mechanical regulation and control of smart window films that require large strain, low sensitivity of optical regulation, and lack of multi-band regulation capability. Nano-microspheres and elastic polymers based on matching refractive index and mismatching elastic modulus have stretch regulation. The mechanism of transparency is to introduce low-binding molecular materials between the nano-microspheres and elastic polymers, and use the low-binding properties of the low-binding molecular materials to allow the nano-microspheres and elastic polymers to quickly separate to form a cavity, thereby achieving Small strain, highly sensitive regulation of visible light; at the same time, using the principle that nanoparticles with a size of less than 100nm have almost no scattering of visible light, the elastic polymer is doped with particles with ultraviolet and / or infrared blocking capabilities, so as to achieve the effect of not affecting the transparency of visible light. Under the premise, the smart window film has both ultraviolet and infrared blocking capabilities

Method used

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  • A highly sensitive mechanically regulated smart window film and its preparation method
  • A highly sensitive mechanically regulated smart window film and its preparation method
  • A highly sensitive mechanically regulated smart window film and its preparation method

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Experimental program
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Embodiment 1

[0055] A method for preparing a highly sensitive mechanically regulated smart window film, the steps are as follows:

[0056] (1) Preparation of SiO 2 Nano microsphere dispersion liquid and dispersion blue E-4R low binding force molecular material solution;

[0057] SiO with an average particle size of 300 nm was added at a concentration of 10 mg / mL 2 The nanospheres were dispersed in isopropanol, and evenly dispersed SiO 2 Nano microsphere dispersion;

[0058] Dissolve the disperse blue E-4R low-binding molecular material in acetone at a concentration of 1 mg / mL, and after ultrasonication for 30 minutes, prepare the disperse blue E-4R low-binding molecular material solution;

[0059] (2) Two-step spraying;

[0060] SiO 2 The nano-microsphere dispersion is loaded into the Master spray gun (spray gun model G44) and sprayed 10 times on the substrate with a spraying pressure of 50KPa, a spraying distance of 5cm and a moving speed of 5cm / s, and then disperse blue E-4R low bin...

Embodiment 2

[0077] A method for preparing a highly sensitive mechanically regulated smart window film, the steps are as follows:

[0078] (1) Preparation of SiO 2 Nano microsphere dispersion and Sudan II low binding force molecular material solution;

[0079] SiO with an average particle size of 300 nm was added at a concentration of 10 mg / mL 2 The nanospheres were dispersed in isopropanol, and evenly dispersed SiO was prepared after strong ultrasonication for 45 minutes 2 Nano microsphere dispersion;

[0080] Dissolve the Sudan II low-binding molecular material in ethanol at a concentration of 1 mg / mL, and after strong ultrasonication for 45 minutes, prepare a Sudan II low-binding molecular material solution;

[0081] (2) Two-step spraying;

[0082] SiO 2 The nano-microsphere dispersion is loaded into the Master spray gun (spray gun model G44) and sprayed 10 times on the substrate with a spraying pressure of 50KPa, a spraying distance of 5cm and a moving speed of 5cm / s, and then the...

Embodiment 3

[0099] A method for preparing a highly sensitive mechanically regulated smart window film, the steps are as follows:

[0100] (1) Preparation of SiO 2 Nano microsphere dispersion liquid and dispersion blue E-4R low binding force molecular material solution;

[0101] SiO with an average particle size of 300 nm was added at a concentration of 10 mg / mL 2 The nanospheres were dispersed in isopropanol, and evenly dispersed SiO was prepared after strong ultrasonication for 40 minutes 2 Nano microsphere dispersion;

[0102] Dissolve the Disperse Blue E-4R low-binding molecular material in acetone at a concentration of 1 mg / mL, and after 40 minutes of strong ultrasonication, prepare the Disperse Blue E-4R low-binding molecular material solution;

[0103] (2) Two-step spraying;

[0104] SiO 2 The nano-microsphere dispersion is loaded into the Master spray gun (spray gun model G44) and sprayed 10 times on the substrate with a spraying pressure of 50KPa, a spraying distance of 5cm a...

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Abstract

The invention relates to a highly sensitive mechanically regulated intelligent window film and a preparation method thereof. The film is a double-layer composite structure, and one layer is a visible light transparency control layer, which is composed of an elastic polymer (transparency greater than or equal to 80%) and nano Microspheres (the surface of which is coated with low-binding molecular materials); the other layer is an ultraviolet and / or infrared blocking layer, which is composed of elastic polymers and ultraviolet light blocking particles and / or infrared light blocking particles uniformly dispersed therein (average The particle size is 10-100nm); the preparation method is: first spray the low-binding molecular material and nano-microsphere dispersion liquid on the substrate, and then pour the curing agent and the elastic material doped with ultraviolet light blocking particles and / or infrared light blocking particles. The mixture of polymer prepolymers is post-cured and finally stripped. The method of the invention is simple, and the prepared film not only has ultraviolet and / or infrared blocking ability, but also has highly sensitive mechanical stretching visible light transparency adjustment ability.

Description

technical field [0001] The invention belongs to the technical field of smart windows, and relates to a highly sensitive mechanically regulated smart window film and a preparation method thereof. Background technique [0002] Sunlight consists of a variety of different wavelengths of light, including 5% of ultraviolet light (150-380nm), 52% of visible light (380-760nm), and 43% of infrared light (760-4000nm). For smart windows, it is necessary to selectively transmit visible light, block harmful ultraviolet light and infrared light with a strong thermal effect, so as to achieve environmental protection and energy saving. In addition, smart windows also need to have the ability to adjust the transmittance and transparency of visible light, so as to have the ability to reduce indoor temperature and adjust privacy. It can be seen that the development of new smart window materials with rapid transparency control ability in the visible light band and ultraviolet and infrared bloc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/01G02B5/20C08J5/18B05D7/24B05D1/02B05D3/00
CPCB05D1/02B05D3/007B05D7/24C08J5/18C08J2383/04C08K2003/2241C08K2003/2272C08K2003/2296C08K2201/011G02B5/208G02F1/0128
Inventor 葛邓腾刘洋杨丽丽宋韶欣刘梦
Owner DONGHUA UNIV
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