Pure-organic long-afterglow composite material and preparation method thereof

A composite material and captain technology, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of toxicity in the preparation process, scarcity of preparation materials, complicated preparation process, etc., achieve simple preparation process, good biocompatibility, overcome the Effects of consumption of non-renewable resources

Inactive Publication Date: 2014-04-02
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of complex preparation process, potential toxicity in the preparation process and scarcity of...

Method used

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  • Pure-organic long-afterglow composite material and preparation method thereof
  • Pure-organic long-afterglow composite material and preparation method thereof
  • Pure-organic long-afterglow composite material and preparation method thereof

Examples

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preparation example Construction

[0020] The preparation method of pure organic long afterglow composite material includes the following steps:

[0021] (1) Under inert atmosphere, pyrolyze disodium edetate at 200-400°C for 2-4 hours to obtain a black fluffy solid;

[0022] (2) Dissolve the black fluffy solid ultrasonically, centrifuge at 3000-10000rpm, centrifuge for 10-20min, remove the black precipitate, take the upper layer of brown-yellow clear liquid, which is the aqueous solution of carbon nanodots, in which the surface of the carbon nanodots is partially oxidized , With abundant carbon-oxygen bonds;

[0023] (3) Fully mix the aqueous solution of carbon nanodots with the aqueous solution of polyvinyl alcohol to obtain a mixed solution. In the mixed solution, the mass ratio of carbon nanodots to polyvinyl alcohol is 1:50-1:500, and the mixed solution is 60-90 After drying at ℃, a pure organic long afterglow composite material is obtained.

[0024] In this embodiment, the concentration of the aqueous solution of...

Embodiment 1

[0028] Put a crucible containing 1.6 grams of ethylenediaminetetraacetic acid into a tube furnace, and keep it under a nitrogen atmosphere at 400°C for 4h. Disodium ethylenediaminetetraacetic acid is completely pyrolyzed to obtain a black fluffy solid; the black fluffy solid Dissolved in 80ml of water with the aid of ultrasound, and then centrifuged (9500rpm, 10min) to remove large particles to obtain a brownish-yellow aqueous solution, that is, an aqueous solution of carbon nanodots obtained by purification; a polyvinyl alcohol aqueous solution with a mass fraction of 10wt% was configured, and the concentration of 1ml was 2mg / ml carbon nano-dot water solution and 5ml polyvinyl alcohol aqueous solution are fully mixed to obtain a mixed solution, and the mixed solution is dried at 60°C to obtain a pure organic long-lasting composite material.

[0029] The composite material prepared in Example 1 was irradiated with an ultraviolet lamp (wavelength: 365nm), and it was observed that ...

Embodiment 2

[0032] Put a crucible containing 1.6 grams of ethylenediaminetetraacetic acid into a tube furnace, and keep it at 200°C for 2h in a nitrogen atmosphere. The disodium ethylenediaminetetraacetic acid is completely pyrolyzed to obtain a black fluffy solid; the black fluffy solid Dissolved in 80ml of water with the aid of ultrasound, and then centrifuged (3000rpm, 20min) to remove large particles to obtain a brown-yellow aqueous solution, that is, an aqueous solution of carbon nanodots obtained by purification; configure a polyvinyl alcohol aqueous solution with a mass fraction of 10wt%, and change the concentration of 1ml to 2mg / ml carbon nanodot aqueous solution and 1ml polyvinyl alcohol aqueous solution are fully mixed to obtain a mixed solution, and the mixed solution is dried at 90° C. to obtain a pure organic long-lasting composite material.

[0033] The composite material prepared in Example 2 was irradiated with an ultraviolet lamp (with a wavelength of 365 nm), and it was ob...

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Abstract

The invention discloses a pure-organic long-afterglow composite material and a preparation method thereof, belongs to the technical field of luminescent materials and is used for solving the problems that the preparation process of a long-afterglow luminescent material is complex, potential toxicity exists in the preparation process, and preparation raw materials are scarce in the prior art. The preparation method comprises the following steps of pyrolyzing ethylene diamine tetraacetic acid disodium for 2-4 hours at 200-400 DEG C in inert atmosphere so as to obtain black fluffy solids, carrying out ultrasonic dissolving on the black fluffy solids, carrying out centrifuging to remove black precipitates, taking an upper-layer tan clear solution as a water solution of carbon nanodots, finally adequately mixing the water solution of the carbon nanodots with a polyvinyl alcohol water solution, and drying to obtain the pure-organic long-afterglow composite material. The pure-organic long-afterglow composite material has the advantages that the afterglow decay time can reach multiple seconds, and the material is non-toxic, is good in biocompatibility and can be applied to the field of biological medicines.

Description

Technical field [0001] The invention belongs to the technical field of luminescent materials, and specifically relates to a pure organic long afterglow composite material and a preparation method thereof. Background technique [0002] Long afterglow luminescent materials refer to materials that can still emit light after the excitation light is stopped and have a long afterglow time. Existing long-lasting luminescent materials include radiation excitation type and sulfide type. The radiation-excited type uses the radiant energy emitted by the radioactive material incorporated in the material as the excitation source to excite the luminescent center to emit light. This type of material contains radioactive materials and is harmful to the environment and human health, and has been banned by most countries. Sulfide types include ZnS, CaS, etc., but these materials are prone to hydrolysis or photolysis under the action of moisture and ultraviolet rays, so the chemical properties are...

Claims

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Application Information

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IPC IPC(8): C09K11/06C09K11/65
Inventor 赵东旭邓业浩王飞申德振
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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