Photochromic titanyl oxalate salt material and preparation method thereof

A titanyl oxalate, photochromic technology, applied in the direction of color-changing fluorescent materials, chemical instruments and methods, etc., can solve the problems of practical application limitations, inability to maintain photochromic properties, shortened life, etc. The effect of excellent reversible photochromic properties

Pending Publication Date: 2020-07-28
TIANJIN CHENGJIAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the defects of the material structure itself, traditional inorganic photochromic materials cannot maintain long-lasting photochromic properties while satisfying fatigue resistance, thus greatly shortening their lifespan, and the practical application is relatively limited.

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  • Photochromic titanyl oxalate salt material and preparation method thereof
  • Photochromic titanyl oxalate salt material and preparation method thereof
  • Photochromic titanyl oxalate salt material and preparation method thereof

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preparation example Construction

[0046] The invention provides a photochromic titanyl oxalate material and a preparation method thereof. The preparation method includes the following steps:

[0047] S1: Add a certain amount of potassium titanium oxalate (K 2 TiO·(C 2 O 4 ) 2 ), after stirring, a potassium titanium oxalate solution with a concentration of 0.05 to 0.35 M is obtained;

[0048] S2: adding hydrochloric acid with a concentration of 36 wt%-38 wt% to the potassium titanium oxalate solution obtained in step S1, and stirring uniformly to obtain a precursor solution, and subjecting the precursor solution to hydrothermal treatment to obtain a reaction product;

[0049] S3: Centrifugally separate the reaction product obtained in step S2, and dry it at 60-80° C. for 3-5 h after washing to prepare a photochromic titanium oxalate material.

[0050] In the following description, steps S1 to S3 will be described in detail.

[0051] In the present invention, step S1 is specifically: adding potassium titanium oxalate (K 2...

Embodiment 1

[0066] Add 0.53 g of potassium titanium oxalate to 30 mL of deionized water with pH=6, and heat and stir at 45°C for 10 minutes until the potassium titanium oxalate is completely dissolved to obtain a potassium titanium oxalate solution; stop stirring and wait until the potassium titanium oxalate solution is naturally cooled to After 25°C, quickly add 3.0 mL of hydrochloric acid to the potassium titanium oxalate solution, and stir at 25°C for 15 minutes until the hydrochloric acid and potassium titanium oxalate solution are evenly mixed as the precursor solution; transfer the precursor solution to an 80 mL reactor and seal it After that, it was placed in an oven and hydrothermally reacted at 110°C for 12 hours to obtain the reaction product; the reaction product was centrifuged, washed and dried at 60°C for 3 hours to obtain the photochromic titanium oxalate oxalate material with a particle size of 8μm .

[0067] See figure 1 with figure 2 Shown is an SEM image of the photochrom...

Embodiment 2

[0071] Add 2.12g of potassium titanium oxalate to 30mL of deionized water with pH=6, heat and stir at 45°C for 10 minutes, until potassium titanium oxalate is completely dissolved, and obtain potassium titanium oxalate solution; stop stirring and wait until the potassium titanium oxalate solution is naturally cooled to 25 After ℃, quickly add 3.0 mL of hydrochloric acid to the potassium titanium oxalate solution, stir at 25 ℃ for 15 minutes, until the hydrochloric acid and potassium titanium oxalate solution are evenly mixed, as the precursor solution; transfer the precursor solution to an 80 mL reactor, and airtight After that, it was placed in an oven and hydrothermally reacted at 100°C for 12 hours to obtain the reaction product; the reaction product was centrifuged, washed and dried at 60°C for 3 hours to obtain the photochromic oxalate titanyl oxalate material with a particle size of 10 μm .

[0072] See Figure 5 with Image 6 Shown is the photochromic titanium oxalate mate...

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Abstract

The invention provides a photochromic titanyl oxalate salt material and a preparation method thereof. The preparation method comprises the following steps: S1, adding a certain amount of titanium potassium oxalate into deionized water, and stirring to obtain a titanium potassium oxalate solution; S2, adding hydrochloric acid with a concentration of 36wt%-38wt% into the titanium potassium oxalate solution obtained in the step S1, uniformly stirring to obtain a precursor solution, and performing a hydrothermal treatment on the precursor solution to obtain a reaction product; and S3, carrying outcentrifugal separation on the reaction product obtained in the step S2, washing, and drying at 60-80 DEG C for 3-5 hours to obtain the photochromic titanyl oxalate material. The photochromic titanyloxalate material has a polyhedral morphology; under a solid state, white is changed into blue gray through 365nm ultraviolet irradiation, blue gray can be changed into white under the irradiation of a500W xenon lamp, and the reversible photochromic material has an excellent reversible photochromic property, light stability and fatigue resistance, can be used as a light reversible material, and isapplied to the fields such as anti-counterfeiting, reversible color development films, erasable 3D printing and the like.

Description

Technical field [0001] The invention provides a photochromic titanyl oxalate material and a preparation method thereof, belonging to the technical field of photochromism. Background technique [0002] Photochromic materials are widely used in the fields of information storage, color-changing glass, sensors, erasable 3D printing, anti-counterfeiting, molecular switches, and sustained drug release. There are three main types of photochromic compounds, namely, traditional inorganic photochromic compounds, organic photochromic compounds and the ever-developing inorganic-organic hybrid photochromic compounds. Compared with organic and inorganic-organic hybrids, inorganic photochromic compounds have good thermal stability and fatigue resistance, strong oxidation resistance, simple preparation process, long-lasting photochromic properties, etc., and can be used for preparation and synthesis Nanomaterials, glass, crystals and composite film materials. [0003] Common inorganic photochrom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K9/02
CPCC09K9/02C09K2211/10
Inventor 鄂磊胡康慨赵丹杨发松邢禹豪李天昊师蕾
Owner TIANJIN CHENGJIAN UNIV
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