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Preparation method of rapid-responding photochromic gel film material

A photochromic, fast-response technology, applied in the direction of color-changing fluorescent materials, chemical instruments and methods, etc., can solve the problems of complex and cumbersome preparation methods, poor uniformity and stability of hydrogel, etc., and achieve simple synthesis process, reversible High color efficiency and high chemical stability

Active Publication Date: 2018-12-18
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology allows for quicker and easier changes made on an opaque sheet that change its appearance when exposed to certain types of radiation such as ultraviolet (UV) rays. It also makes sure there won't damage any other things around them during production.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving the performance of photochemistry systems made from different types of molecule(s)-based material combinations during use without being limited by factors like fast respond speeds.

Method used

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  • Preparation method of rapid-responding photochromic gel film material
  • Preparation method of rapid-responding photochromic gel film material
  • Preparation method of rapid-responding photochromic gel film material

Examples

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Embodiment 1

[0036] A preparation method of a photochromic gel film material, the specific steps are as follows:

[0037] (1) Take 30 mg of SnO 2 Nanoparticles, dispersed in 2 mL of deionized water, added 30 μL of methylene blue (MB) aqueous solution (0.01 M) and 1 mL of ethylene glycol (EG);

[0038] (2) Add 6g of polyvinyl alcohol (PVA) powder with a molecular weight of 13w and 94mL of deionized water into a 100mL three-necked flask, stir magnetically and heat at 70°C for 3h;

[0039] (3) Add 3 mL of dissolved PVA aqueous solution to the well-mixed SnO 2 / MB / EG solution, ultrasonically shake; add 0.02-0.6g phosphoric acid and 0.1-10μL 0.0426mol / L glutaraldehyde solution to the system, and ultrasonically stir for 10min;

[0040] (4) drop the solution obtained in step (3) on 5*6cm 2 The photochromic gel film material was obtained by drying at 40° C. for 4 h on a glass substrate or a PET substrate.

Embodiment 2

[0042] A preparation method of a photochromic gel film material, the specific steps are as follows:

[0043] (1) Take 30 mg of SnO 2 Nanoparticles, dispersed in 2 mL of deionized water, added 30 μL of neutral red aqueous solution (0.01 M) and 1 mL of ethylene glycol;

[0044] (2) Add 1 g of polyethylene oxide (PEO) powder with a molecular weight of 50w and 99 mL of deionized water into a 100 mL three-necked flask, stir magnetically and heat at 70°C for 3 hours;

[0045] (3) Add 3 mL of dissolved PEO aqueous solution to the well-mixed SnO 2 / NR / EG solution, ultrasonic vibration;

[0046] (4) Add an appropriate amount of peroxide initiator and vinyl monomer to the solution obtained in step (3), and mix them well; drop the obtained solution on 5*6cm 2 The photochromic gel film material was obtained by drying at 40° C. for 4 h on a glass substrate or a PET substrate.

Embodiment 3

[0048] A preparation method of a photochromic gel film material, the specific steps are as follows:

[0049] (1) Take 30mg of MnO 3Nanoparticles, dispersed in 2mL of deionized water, added 30μL of neutral red aqueous solution (0.01M) and 1mL of polyethylene glycol 400;

[0050] (2) Add 2g of polyethylene oxide (PEO) powder with a molecular weight of 20w and 98mL of deionized water into a 100mL three-necked flask, stir magnetically and heat at 70°C for 3h;

[0051] (3) Add 3 mL of dissolved PEO aqueous solution to the homogeneously mixed MnO 2 / NR / PEG 400 solution, ultrasonic vibration;

[0052] (4) Add an appropriate amount of peroxide initiator and vinyl monomer to the solution obtained in step (3), and mix them well; drop the obtained solution on 5*6cm 2 The photochromic gel film material was obtained by drying at 40° C. for 4 h on a glass substrate or a PET substrate.

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Abstract

The invention relates to a preparation method of a rapid-responding photochromic gel film material. The preparation method includes: 1) uniformly mixing a catalyst water solution with a color developing unit water solution and adding an alcohol solvent to prepare a catalyst/color developing unit mixed solution; 2) dissolving a polymer material in water to form a mixed solution, heating the mixed solution to fully swell and dissolve the polymer material, thus preparing a polymer material solution; 3) adding the catalyst/color developing unit mixed solution to the polymer material solution and finally adding a crosslinker to obtain a drip-coating liquid; 4) coating a substrate with the drip-coating liquid in a drip-coating manner and drying the coating. The gel film is high in color change speed; under stimulation by ultraviolet light, the gel film is faded within 5-8 sec; the color can be recovered just in 15 min in a shade room at 25 DEG C, and if under stimulation by red light, the color can be recovered just in 140 s. The gel film material is low in cost and simple in preparation method, is high in reversible color change efficiency, is long in service life, and has great application value in the fields such as information storage, anti-faking technology and the like.

Description

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Claims

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Application Information

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Owner SHANDONG UNIV
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