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Tungsten oxide-graphene photochromic composite film and preparation and application methods thereof

A technology of graphene composite and composite film, which is applied in the direction of optics, optical components, instruments, etc., can solve the problems of poor performance, long photochromic fading time, etc., to improve uniformity and compactness, improve photochromic performance, Apply promising effects

Inactive Publication Date: 2019-04-23
JINLING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Purpose of the invention: The purpose of the present invention is to provide a tungsten oxide-graphene photochromic composite film and its preparation method to solve the problems of long fading time and poor performance of photochromism

Method used

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  • Tungsten oxide-graphene photochromic composite film and preparation and application methods thereof
  • Tungsten oxide-graphene photochromic composite film and preparation and application methods thereof
  • Tungsten oxide-graphene photochromic composite film and preparation and application methods thereof

Examples

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Effect test

Embodiment 1

[0030] The parameters of the tungsten oxide-graphene composite film prepared by dipping and pulling method are the same as those of the comparative example. Weigh 6.6g of sodium tungstate and dissolve it in 20mL of ultrapure water, and add concentrated hydrochloric acid dropwise during stirring to adjust the pH to 4 to obtain 0.4mol / L sodium tungstate solution A. Weigh 1.8g of oxalic acid and dissolve it in 20mL of ultrapure water, and ultrasonically shake at 50°C for 10min to prepare 0.7mol / L oxalic acid solution B. Weigh 1.26 g of citric acid and dissolve it in 10 mL of ultrapure water to prepare citric acid solution C with a concentration of 0.6 mol / L. Mix and stir solution A and solution B for 10 minutes, then add solution C, continue stirring for another 10 minutes, and age in air for 24 hours after stirring to obtain WO 3Precursor sol. in WO 3 Hydroxylated graphene quantum dots were added to the precursor sol at a concentration of 0.14g / L and ultrasonically oscillated...

Embodiment 2

[0033] Preparation of WO by spin coating method 3 -The parameters of the graphene composite film are the same as those of the comparative example. Weigh 8.63g of calcium tungstate, dissolve it in 20mL of ethanol, and add concentrated sulfuric acid dropwise during stirring to adjust the pH to 3 to prepare 1.5mol / L calcium tungstate solution A. Weigh 1.8 g of oxalic acid, dissolve it in 20 mL of ultrapure water, and oscillate ultrasonically at 50 °C for 10 min to prepare 0.7 mol / L oxalic acid solution B. Weigh 0.84 g of citric acid and dissolve it in 10 mL of ultrapure water to prepare 0.4 mol / L citric acid solution C. Mix and stir solution A and solution B for 10 minutes, then add solution C, continue stirring for 10 minutes, and age in air for 12 hours after stirring to obtain WO 3 Precursor sol. in WO 3 The carboxylated graphene quantum dots added in the precursor sol, the concentration is 0.06g / L, and the ultrasonic vibration is 30min, so that the graphene is evenly disp...

Embodiment 3

[0036] The parameters of the tungsten oxide-graphene composite film prepared by dipping and pulling method are the same as those of the comparative example. Weigh 9.9g of sodium tungstate, dissolve it in 20mL of ultrapure water, and add concentrated hydrochloric acid dropwise during stirring to adjust the pH to 3 to prepare 0.8mol / L sodium tungstate solution A. Take 0.96 g of acetic acid and dissolve it in 20 mL of ultrapure water to prepare acetic acid solution B with a concentration of 0.8 mol / L. Weigh 9.16 g of sodium hexametaphosphate and dissolve it in 10 mL of ultrapure water to obtain sodium hexametaphosphate solution C with a concentration of 1.5 mol / L. Mix and stir solution A and solution B for 10 minutes, then add solution C, continue stirring for 10 minutes, and age in air for 36 hours after stirring to obtain WO 3 Precursor sol. in WO 3 Add hydroxylated reduced graphene oxide to the precursor sol, the concentration is 0.18g / L, ultrasonic vibration for 30min, so ...

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Abstract

The invention discloses a tungsten oxide-graphene photochromic composite film and preparation and application methods thereof. The method comprises, according to the advantage of hydrophilia of hydroxylated or carboxylated graphene, dispersing the hydroxylated or carboxylated graphene into tungsten precursor sol to prepare the tungsten oxide-graphene photochromic composite film higher in photochromic performance than pure tungsten oxide films The preparation method of the tungsten oxide-graphene photochromic composite film is low in cost, saves expensive equipment and raw materials and achieves high process stability; by controlling the processes, the tungsten oxide-graphene composite film with excellent photochromic performance can be prepared. The preparation method of the tungsten oxide-graphene photochromic composite film can achieve preparation of the tungsten oxide-graphene composite film on resin lenses as well as application of the tungsten oxide-graphene photochromic compositefilm to spectacle lenses.

Description

technical field [0001] The invention relates to a photochromic film, a preparation method and an application, in particular to a tungsten oxide-graphene photochromic composite film, a preparation method and an application. Background technique [0002] With the development of science and technology, human society has entered the digital and intelligent information age. Digitalization and new technologies affect every field of people's future life. Smart materials have sensing, feedback, information identification and accumulation, Response and self-diagnosis, repair, adaptation and other intelligent functions and life characteristics have become the key research materials of scientists in recent years. Photoresponsive smart materials include photoresponsive hydrogels and photochromic materials, and photochromic materials can undergo reversible color changes under specific wavelengths of light, making them useful in color-changing glasses, optical information storage, photomo...

Claims

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Application Information

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IPC IPC(8): C03C17/22C03C17/00G02B1/00
CPCC03C17/006C03C17/22G02B1/00
Inventor 王威蒙爽郝凌云张小娟王江图
Owner JINLING INST OF TECH
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