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Reflective switchable glass based on electroresponse and preparation method thereof

A dimming glass, electrical response technology, applied in optics, nonlinear optics, instruments, etc., can solve problems such as slow response speed

Active Publication Date: 2016-11-16
SOUTH CHINA NORMAL UNIVERSITY +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One of the switchable glasses based on electrical response adjusts the direction of the liquid crystal through power on and off, and then adjusts the transmission, scattering or reflection of light. However, the current switchable glass based on electrical response relies on the alignment layer after power off. The effect makes the liquid crystal molecules rotate back to the original state, and there is a problem that the response speed is slow and it takes a long time to return to the initial state.

Method used

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  • Reflective switchable glass based on electroresponse and preparation method thereof
  • Reflective switchable glass based on electroresponse and preparation method thereof
  • Reflective switchable glass based on electroresponse and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Prepare two light-transmitting substrates, respectively coat a vertical alignment layer on one surface of the two light-transmitting substrates; arrange the surfaces of the two light-transmitting substrates coated with the alignment layer opposite to prepare a liquid crystal cell; take 3 mass parts of photopolymerizable liquid crystal monomers, 0.12 mass parts of dichroic dye molecules, 0.5 mass parts of photoinitiators and 96.38 mass parts of negative liquid crystals are mixed to obtain a liquid crystal mixture. Under yellow light, the The liquid crystal mixture is heated to 60°C to transform the liquid crystal into an isotropic liquid state, and then inject the mixed liquid crystal into the liquid crystal cell at this temperature. After the filling is completed, then keep it warm for 30 minutes to align the liquid crystal molecules; seal the liquid crystal cell; The liquid crystal cell is cured under 200W ultraviolet light for 5 minutes, so that the liquid crystal mole...

Embodiment 2

[0044] Prepare two light-transmitting substrates, respectively coat a vertical alignment layer on one surface of the two light-transmitting substrates; arrange the surfaces of the two light-transmitting substrates coated with the alignment layer opposite to prepare a liquid crystal cell; take 1.5 mass parts of photopolymerizable liquid crystal monomers, 0.06 mass parts of dichroic dye molecules, 0.25 mass parts of photoinitiators and 70 mass parts of negative liquid crystals are mixed to obtain liquid crystal mixtures. Under yellow light, the The liquid crystal mixture is heated to 60°C to transform the liquid crystal into an isotropic liquid state, and then inject the mixed liquid crystal into the liquid crystal cell at this temperature. After the filling is completed, then keep it warm for 30 minutes to align the liquid crystal molecules; seal the liquid crystal cell; The liquid crystal cell is cured under 200W ultraviolet light for 5 minutes, so that the liquid crystal molec...

Embodiment 3

[0046] Prepare two light-transmitting substrates, respectively coat a vertical alignment layer on one surface of the two light-transmitting substrates; arrange the surfaces of the two light-transmitting substrates coated with the alignment layer opposite to prepare a liquid crystal cell; take 5 mass parts of photopolymerizable liquid crystal monomers, 0.18 mass parts of dichroic dye molecules, 0.75 mass parts of photoinitiators and 100 mass parts of negative liquid crystals are mixed to obtain a liquid crystal mixture. Under yellow light, the The liquid crystal mixture is heated to 60°C to transform the liquid crystal into an isotropic liquid state, and then inject the mixed liquid crystal into the liquid crystal cell at this temperature. After the filling is completed, then keep it warm for 30 minutes to align the liquid crystal molecules; seal the liquid crystal cell; The liquid crystal cell is cured under 200W ultraviolet light for 5 minutes, so that the liquid crystal molec...

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Abstract

The invention discloses reflective switchable glass based on electroresponse and a preparation method thereof. The switchable glass comprises two opposite light-transmitting substrates, the space between the two light-transmitting substrates is packaged to form an adjusting area, the adjusting area is filled with a liquid crystal mixture, the liquid crystal mixture comprises liquid crystal monomers, a photoinitiator and negative liquid crystals, the liquid crystal monomers can be polymerized to form a polymer network, and the negative liquid crystals are distributed in the polymer network. When no voltage is applied, the negative liquid crystals are arranged perpendicular to the light-transmitting substrates in a single domain, and visible light is transmitted. When voltages are applied, the negative liquid crystals are arranged parallel to the light-transmitting substrates in many domains, light scattering is enhanced, and the switchable glass is switched into a light scattering state from a light transmitting state. A power-on state is switched into a power-off state, the reflective switchable glass drives the negative liquid crystals to turn by depending on the restoration function of the polymer network, and the response speed is higher than that of traditional switchable glass; the polymer network is formed in the adjusting area, so that the transmissivity of the switchable glass is lower.

Description

technical field [0001] The invention relates to the field of construction and household living materials, and in particular to a trans-switchable glass based on electrical response and a preparation method thereof. Background technique [0002] In the past, the light transmittance of the colored dimming glass made of colored glass or color film is greatly reduced after electrification, and the glass presents a very strong color, which affects the use effect and appearance of the dimming glass. [0003] In order to achieve the purpose of sunlight transmission and reflection on colored glass, the glass window is generally coated so that light of a certain wavelength in the light can be reflected or transmitted by the glass window. According to different reflective and light-transmitting requirements, films of different materials can be used. [0004] Existing car window glass has a coating layer on the glass surface, and the coating layer has a high blocking effect on visible...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13G02F1/1333
CPCG02F1/13G02F1/1313G02F1/1333
Inventor 胡小文鞠纯李楠周国富
Owner SOUTH CHINA NORMAL UNIVERSITY
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