Non-metallic polymer carbon point with room temperature phosphorescent performance as well as preparation method and application thereof

A room temperature phosphorescence and polymer technology, applied in chemical instruments and methods, luminescent materials, nano-optics, etc., can solve the problems of complex synthesis, high price and limited types of metal-free room temperature phosphorescence materials, and achieve excellent room temperature phosphorescence properties and cost. Low cost and excellent product performance

Active Publication Date: 2018-06-22
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, metal room-temperature phosphorescent materials are expensive and highly toxic, while metal-free room-temperature phosphorescent materials are complicated to synthesize and have limited types.

Method used

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  • Non-metallic polymer carbon point with room temperature phosphorescent performance as well as preparation method and application thereof
  • Non-metallic polymer carbon point with room temperature phosphorescent performance as well as preparation method and application thereof
  • Non-metallic polymer carbon point with room temperature phosphorescent performance as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Preparation of polymer carbon dots 1

[0026] Weigh 72 mg of polyacrylic acid and dissolve it in 10 mL of deionized water; weigh 140 μL of ethylenediamine and add it to the above aqueous solution, and stir evenly with a glass rod. The above solution was transferred into a 20mL polytetrafluoroethylene-lined stainless steel reaction kettle, the lid of the kettle was tightened, and the reaction temperature was 200°C for 8 hours of hydrothermal reaction. Allow the reactor to cool down to room temperature naturally to obtain an aqueous solution of polymer carbon dots. Put the obtained polymer carbon dot aqueous solution into a dialysis bag with a molecular weight of 3500, and fully dialysis for 48 hours. Use a rotary evaporator to concentrate the collected dialyzed internal fluid and carry out vacuum freeze-drying (pressure 5Pa; temperature -25°C; drying time 24h) to obtain a solid powder of polymer carbon dots 1 with room temperature phosphorescence properties, and the pro...

Embodiment 2

[0029] Effect of Experimental Conditions on Properties of Polymer Carbon Dots 1

[0030] Raw material feeding ratio: Weigh 72 mg of polyacrylic acid and dissolve it in 10 mL of deionized water; measure different volumes of ethylenediamine (20, 40, 60, 80, 100, 120, 140, 160, 180, 200 μL) into the above aqueous solution, and use The glass rod was stirred evenly, and the subsequent preparation process was as in Example 1 to explore the influence of different feed ratios on the luminescent properties of polymer carbon dots under the same time and temperature conditions.

[0031] Reaction time: Weigh 72 mg of polyacrylic acid and dissolve it in 10 mL of deionized water; measure 140 μL of ethylenediamine and add it to the above aqueous solution, and stir evenly with a glass rod. The subsequent preparation process is as in Example 1. Under the condition of 200°C, hydrothermal treatment was performed for different times (2, 4, 6, 8, 10 h) to explore the effect of reaction time on the...

Embodiment 3

[0035] Study on the Stability of Polymer Carbon Dots 1

[0036] The preparation process was as in Example 1, and the obtained polymer carbon dot 1 was subjected to thermogravimetric analysis to determine its thermal stability. the result shows( Figure 10 ), the polymer carbon dots 1 hardly decomposes within 200 °C, indicating that it has good thermal stability.

[0037] The preparation process was as in Example 1. The obtained polymer carbon dots 1 were exposed to ultraviolet rays for 10 h, and the phosphorescence lifetime and luminous intensity within an hour were recorded, and the exposure time-lifetime / intensity curve was drawn. Such as Figure 11 As shown, after 10 h of UV exposure, the phosphorescence lifetime of polymer carbon dots 1 remained basically unchanged but the luminous intensity decreased slightly, indicating that polymer carbon dots had excellent anti-bleaching ability and stable luminescence performance.

[0038] The preparation process is as in Example 1...

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Abstract

The invention belongs to a non-metallic polymer carbon point with room temperature phosphorescent performance as well as a preparation method and application thereof to preparation of a polymer pointfilm material and anti-counterfeiting, and belongs to the technical field of luminous carbon nanometer material preparation. According to the method, polyacrylic acid or polyvinyl alcohol is weighed and is dissolved into deionized water; ethylenediamine, neovaricaine, propane diamine or butanediamine are weighed and are added into the polyacrylic acid solution; sufficient mixing and uniform stirring are performed; the obtained mixed solution is subjected to hydrothermal reaction for 2 to 10 hours under the condition of 150 to 250 DEG C; then, natural cooling is performed to room temperature; next, the water solution is subjected to dialysis, concentration, impurity and excessive raw material removal; finally, vacuum freeze drying is performed to prepare the polymer carbon point solid powder with the room temperature phosphorescent performance. The method provided by the invention effectively solves the problems of complicated synthesis, limited types, high price, high toxicity and thelike of the existing room temperature phosphorescent material, and can be used for simply and conveniently preparing the polymer carbon point with different room temperature phosphorescent characteristics in batches.

Description

technical field [0001] The invention belongs to the technical field of preparation of luminescent carbon nanometer materials, and in particular relates to a metal-free polymer carbon dot with room temperature phosphorescence properties, a preparation method and its application in the preparation of a polymer carbon dot film material and in anti-counterfeiting. Background technique [0002] Room-temperature phosphorescent materials have special light-emitting properties, and show wide application potential in the fields of imaging and information security. However, it is extremely difficult to observe phosphorescence at room temperature because the generation of phosphorescence involves forbidden transitions of electrons and is easily quenched by water and oxygen in the environment at room temperature. At present, the room-temperature phosphorescent materials that are easy to prepare can be mainly divided into two categories: organometallic complexes (containing metals, usual...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/65C09K11/02B82Y20/00B82Y30/00B82Y40/00G09F3/02
CPCB82Y20/00B82Y30/00B82Y40/00C09K11/025C09K11/65G09F3/02G09F2003/0213
Inventor 杨柏陶淞源卢思宇宋玉彬
Owner JILIN UNIV
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