Amphiphilic graphene quantum dot material, preparation method thereof, fluorescent coding anti-counterfeiting ink based on the material and preparation method of the ink

A technology of graphene quantum dots and fluorescent encoding, which is applied in the nanometer field, can solve the problems that the product is difficult to dissolve in various solvents, the preparation process is cumbersome, and the application is limited, so as to achieve good controllability, simplify the preparation steps, and reduce the preparation cost. Effect

Active Publication Date: 2019-12-27
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to overcome the shortcoming of above-mentioned prior art, provide a kind of amphiphilic graphene quantum dot material and preparation method thereof, and fluorescent coding anti-counterfeit ink and preparation method based on it; To solve its preparation process is loaded down with trivial details, productive rate Low, the prepared product is difficult to dissolve in a variety of solvents, which limits the application of graphene quantum dot aggregates in fluorescent coding anti-counterfeiting technology

Method used

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  • Amphiphilic graphene quantum dot material, preparation method thereof, fluorescent coding anti-counterfeiting ink based on the material and preparation method of the ink
  • Amphiphilic graphene quantum dot material, preparation method thereof, fluorescent coding anti-counterfeiting ink based on the material and preparation method of the ink
  • Amphiphilic graphene quantum dot material, preparation method thereof, fluorescent coding anti-counterfeiting ink based on the material and preparation method of the ink

Examples

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Effect test

Embodiment 1

[0049] Weigh 1.60g of acetyl triethyl citrate, 0.75g of aminobutanol, (the molar ratio is 1:1.7), mix thoroughly, place in a 20mL glass microwave reaction tube, and control the reaction under 2.45GHz, 700W microwave irradiation conditions React at a temperature of 300°C for 3 minutes to obtain a crude product of amphiphilic graphene quantum dots. After cooling to room temperature, 4 mL of ethanol was added to the microwave reaction tube, and the product was completely dispersed by ultrasonic treatment. The ethanol dispersion of the prepared graphene quantum dots was transferred to a 50mL centrifuge tube, and 20mL of ethyl acetate was added therein to precipitate the graphene quantum dots from the ethanol-ethyl acetate mixed solution. The obtained product was centrifuged and precipitated, and the supernatant was removed by decanting, and 4 mL of ethanol was added to the precipitate, and the precipitate was dispersed in ethanol again by ultrasonic dispersion. The precipitate wa...

Embodiment 2

[0057] Weigh 1.60g of acetyl triethyl citrate, 2.24g of aminobutanol, (molar ratio is 1:5), mix thoroughly, place in a 20mL glass microwave reaction tube, and control the reaction under 2.45GHz, 700W microwave irradiation conditions React at a temperature of 300°C for 3 minutes to obtain a crude product of amphiphilic graphene quantum dots. After cooling to room temperature, 4 mL of ethanol was added to the microwave reaction tube, and the product was completely dispersed by ultrasonic treatment. The ethanol dispersion of the prepared graphene quantum dots was transferred to a 50mL centrifuge tube, and 20mL of ethyl acetate was added therein to precipitate the graphene quantum dots from the ethanol-ethyl acetate mixed solution. The obtained product was centrifuged and precipitated, and the supernatant was removed by decanting, and 4 mL of ethanol was added to the precipitate, and the precipitate was dispersed in ethanol again by ultrasonic dispersion. The precipitate was wash...

Embodiment 3

[0060] Weigh 1.60g of acetyl triethyl citrate, 0.75g of aminobutanol (molar ratio is 1:1.7), mix thoroughly, place in a 20mL glass microwave reaction tube, and control the reaction under 2.45GHz, 700W microwave irradiation conditions React at a temperature of 300°C for 3 minutes to obtain a crude product of amphiphilic graphene quantum dots. After cooling to room temperature, 4 mL of ethanol was added to the microwave reaction tube, and the product was completely dispersed by ultrasonic treatment. The ethanol dispersion of the prepared graphene quantum dots was transferred to a 50mL centrifuge tube, and 20mL of ethyl acetate was added therein to precipitate the graphene quantum dots from the ethanol-ethyl acetate mixed solution. The obtained product was centrifuged and precipitated, and the supernatant was removed by decanting, and 4 mL of ethanol was added to the precipitate, and the precipitate was dispersed in ethanol again by ultrasonic dispersion. The precipitate was was...

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Abstract

The invention discloses an amphiphilic graphene quantum dot material, a preparation method thereof, fluorescent coding anti-counterfeiting ink based on the amphiphilic graphene quantum dot material and a preparation method of the fluorescent coding anti-counterfeiting ink. Hydrophobic citrate is used as a carbon source, hydrophilic amino alcohol is used as a nitrogen doping agent, and the amphiphilic graphene quantum dot material with hydrophobic ester groups and hydrophilic alcoholic hydroxyl edge groups is prepared through carbonization treatment. The prepared amphiphilic graphene quantum dot material has a high fluorescence quantum yield and good light, heat and chemical stability, and can be dispersed in various polar and non-polar solvents. Under certain conditions, the amphiphilic graphene quantum dot material can form an aggregate on the surfaces of a solution and a solid, and fluorescence emission of the amphiphilic graphene quantum dot material is changed from a single peak tomultiple peaks. The aggregation degree and aggregation state of the amphiphilic graphene quantum dot material are regulated and controlled, so that the fluorescence emission intensities of the amphiphilic graphene quantum dot material at different wavelengths are correspondingly changed, and the fluorescence coding marking based on the fluorescence intensity ratio is realized.

Description

【Technical field】 [0001] The invention belongs to the field of nanotechnology, and in particular relates to an amphiphilic graphene quantum dot material and a preparation method thereof, and a fluorescent coding anti-counterfeiting ink based on the same and a preparation method thereof. 【Background technique】 [0002] Fluorescent anti-counterfeiting marking technology utilizes the fluorescent emission of fluorescent materials under ultraviolet irradiation to realize anti-counterfeiting markings. Compared with anti-counterfeiting technologies such as watermarks, lasers, and color-changing inks, fluorescent anti-counterfeiting markings are transparent under visible light and hardly affect the original appearance of the item. It shows bright fluorescence under ultraviolet light, has high readability, and can be combined with screen printing, inkjet printing and other technologies to realize the combination of fluorescent anti-counterfeiting and pattern, two-dimensional code and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/184B82Y20/00B82Y30/00C09D11/50C09K11/65
CPCB82Y20/00B82Y30/00C01B32/184C09D11/50C09K11/65
Inventor 吴宥伸和玲潘爱钊
Owner XI AN JIAOTONG UNIV
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