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Water-sensitive fluorescence enhanced test paper as well as preparation method and application thereof

A technology of fluorescence enhancement and test paper, which is applied in the application field of fluorescent carbon nanomaterials, to achieve the effect of low cost, strong photobleaching resistance, and wide application

Active Publication Date: 2014-12-24
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the prior art, there is no technology based on carbon nanodot composite materials to realize water jet fluorescent printing, sweat pore fluorescence imaging or humidity monitoring

Method used

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  • Water-sensitive fluorescence enhanced test paper as well as preparation method and application thereof
  • Water-sensitive fluorescence enhanced test paper as well as preparation method and application thereof
  • Water-sensitive fluorescence enhanced test paper as well as preparation method and application thereof

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Experimental program
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preparation example Construction

[0042] The present invention also provides a method for preparing the above-mentioned amphiphilic carbon nano-dots: functionalize part of the hydrophilic groups on the surface of the water-soluble carbon nano-dots into lipophilic groups, generally functionalize 30-80% of the hydrophilic groups into lipophilic groups group.

[0043] The present invention provides a method for preparing amphiphilic carbon nano-dots, but is not limited thereto:

[0044] (1) Add water-soluble carbon nano-dots, lipophilic compounds containing substituents, catalysts and solvents into the reaction device, stir evenly, and heat to reflux, so that water-soluble carbon nano-dots and lipophilic compounds undergo condensation reactions or substitution reactions to obtain solution after reaction;

[0045] Among them, the mass ratio of water-soluble carbon nano-dots and lipophilic compounds containing substituents is 1: (5-30), the catalyst is added in corresponding proportions according to the prior art,...

Embodiment 1

[0066] combined with Figure 1-4 Illustrative Example 1

[0067] Preparation of amphiphilic fluorescent carbon nanodots:

[0068] (1) Weigh 3g citric acid (C 6 h 8 o 7 ·H 2 O) and 6g urea (CH4N2O) are blended in a clean beaker, add 20mL of deionized water and fully stir to make it dissolve; then transfer to a microwave oven and heat for 4min under 1000w power to obtain a black coke-like paste solid; then The beaker is placed in a blast drying oven for 1 hour to obtain water-soluble carbon nanodots;

[0069] (2) Weigh 0.6g water-soluble carbon nano-dots, 4g anhydrous potassium carbonate (Tianjin Guangfu Fine Chemical Research Institute), 0.4g potassium iodide (Tianjin Fengchuan Chemical Reagent Technology Co., Ltd.), 60mLN, N-dimethyl Formamide (Xilong Chemical Co., Ltd.), 2.4mL bromododecane (Tianjin Guangfu Fine Chemical Research Institute) were blended in a 250mL Erlenmeyer flask, and a 4cm cylindrical stirrer was stirred at 600 rpm at 180°C. Heating under reflux for ...

Embodiment 2

[0074] The hydrophilic groups of the amphiphilic carbon nano-dots are carboxyl groups and / or hydroxyl groups, and the lipophilic groups are propenyl groups;

[0075] The preparation method of the above-mentioned amphiphilic carbon nano-dots:

[0076] Weigh 0.6g of water-soluble carbon nanodots, 60mL of N, N-dimethylformamide (Xilong Chemical Co., Ltd.), 1.4mL of acrylamine (Tianjin Guangfu Fine Chemical Research Institute) and blend them in a 250mL Erlenmeyer flask. Add 2 mL of concentrated sulfuric acid, heat and reflux for 8 hours; after the reaction, filter the reacted solution twice with a suction filter, then distill under reduced pressure at 150°C until the solvent is completely evaporated to dryness; add the reaction product to 20 mL of n-hexane Dissolve in medium (lipophilic carbon nano-dots and amphiphilic carbon nano-dots are dissolved in n-hexane); centrifuge the n-hexane solution in which the carbon nano-dots are dissolved at high speed to obtain the desired amphip...

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Abstract

The invention discloses water-sensitive fluorescence enhanced test paper as well as a preparation method and an application thereof, and belongs to the field of the application of a fluorescent carbon nanomaterial. The application of carbon dots is further broadened. The fluorescence enhanced test paper is composited by nano particles and paper, wherein the nano particles are formed by gathering amphiphilic carbon dots dissolved in a non-polar solvent, and the amphiphilic carbon dots have hydrophilic groups and lipophilic groups on the surfaces. The water-sensitive fluorescence enhanced test paper is used for jetting fluorescent printing, so that ink-free jet printing can be realized; the water-sensitive fluorescence enhanced test paper is used for sweat pore fluorescent imaging, so that the sweat pore perspiration function can be monitored; the water-sensitive fluorescence enhanced test paper can further be used for detecting humidity, thus, the application of the carbon dots is further broadened; and besides, the water-sensitive fluorescence enhanced test paper has higher photobleaching resistance, is low in manufacturing cost, and can be widely applied to industrial production.

Description

technical field [0001] The invention relates to the application field of fluorescent carbon nanomaterials, in particular to a water-sensitive fluorescent enhanced test paper and its preparation method and application. Background technique [0002] Carbon nanodots (Carbon dots, CDs) are a kind of carbon nanomaterials that can emit light. Compared with semiconductor quantum dots and organic fuels, they have low molecular weight, small particle size, high fluorescence stability, no light flicker, wide excitation spectrum and Continuous, tunable emission wavelength, good biocompatibility, low toxicity, etc., have broad application prospects in the fields of biomolecular labeling, in vivo imaging, sensing, and optoelectronics. [0003] Waterjet printing is a green printing technology that uses water as printing ink to clearly print the required information, thereby avoiding a series of economic and environmental problems caused by the lack of fluorescent ink and the replacement o...

Claims

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Application Information

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IPC IPC(8): G01N21/64C09K11/65C09K11/02
Inventor 曲松楠娄庆
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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