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Water-sensitive fluorescent enhanced test paper and its preparation method and application

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

Active Publication Date: 2017-07-25
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 fluorescent enhanced test paper and its preparation method and application
  • Water-sensitive fluorescent enhanced test paper and its preparation method and application
  • Water-sensitive fluorescent enhanced test paper and its preparation method and application

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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 of citric acid (C 6 H 8 O 7 ·H 2 O) blended with 6g urea (CH4N2O) in a clean beaker, added 20mL deionized water and stirred to dissolve it; then transferred to a microwave oven, heated at 1000w power for 4min to obtain a black coke-like pasty solid; then The beaker was placed in a blast drying oven for 1 hour to obtain water-soluble carbon nanodots;

[0069] (2) Weigh 0.6g of water-soluble carbon nanodots, 4g of anhydrous potassium carbonate (Tianjin Guangfu Fine Chemical Research Institute), 0.4g of potassium iodide (Tianjin Fengchuan Chemical Reagent Technology Co., Ltd.), 60mL of N,N-dimethyl Formamide (Xilong Chemical Co., Ltd.), 2.4mL bromododecane (Tianjin Guangfu Fine Chemical Research Institute) were mixed in a 250mL conical flask, and a 4cm cylindrical stirrer was stirred at 600 rpm at 180°C. Heat under reflux for 12 h; ...

Embodiment 2

[0074] The hydrophilic group of the amphiphilic carbon nanodots is carboxyl group and / or hydroxyl group, and the lipophilic group is acryl group;

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

[0076] Weigh 0.6g of water-soluble carbon nanodots, 60mL of N,N-dimethylformamide (Xilong Chemical Co., Ltd.), and 1.4mL of acrylamine (Tianjin Guangfu Institute of Fine Chemicals) and blend them in a 250mL conical flask, Add 2 mL of concentrated sulfuric acid, and heat under reflux for 8 hours; after the reaction, the reacted solution was suction-filtered twice with a suction filtration device, and then distilled under reduced pressure at 150 °C until all the solvent was evaporated to dryness; the reaction product was added to 20 mL of n-hexane (The lipophilic carbon nanodots and the amphiphilic carbon nanodots are dissolved in n-hexane); the n-hexane solution dissolved with the carbon nanodots is centrifuged at high speed to obtain the desired amp...

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Abstract

The invention discloses a water-sensitive fluorescent enhanced test paper and a preparation method and application thereof, which belong to the application field of fluorescent carbon nanometer materials and further broaden the application of carbon nanometer dots. The fluorescence enhanced test paper is composed of nanoparticles and paper; wherein, the nanoparticles are formed by dissolving amphiphilic carbon nano-dots in a non-polar solvent and aggregated, and the surface of the amphiphilic carbon nano-dots has hydrophilic groups and lipophilic groups . The water-sensitive fluorescent enhanced test paper of the present invention is used for water-jet fluorescent printing, which can realize ink-free water-jet printing; used for sweat pore fluorescence imaging, can realize the monitoring of sweat wicking function of sweat pores; can also be used for humidity detection, further expanding The application of carbon nano-dots; and the water-sensitive fluorescent enhanced test paper of the present invention has strong photobleaching resistance, low cost, and can be widely used in 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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Patent Type & Authority Patents(China)
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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