Preparation method of carbon dot/chitosan in-situ composite material

An in-situ composite material, chitosan technology, applied in luminescent materials, chemical instruments and methods, electrolytic organic material coating and other directions, can solve the problems of increasing production costs, prolonging production cycle, increasing equipment and operation steps, etc. Short reaction time, simple and convenient operation, and the effect of simplifying the post-processing process

Inactive Publication Date: 2015-02-18
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the blending method is used to prepare carbon dots/chitosan composites, because the blending process req...

Method used

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  • Preparation method of carbon dot/chitosan in-situ composite material
  • Preparation method of carbon dot/chitosan in-situ composite material
  • Preparation method of carbon dot/chitosan in-situ composite material

Examples

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Embodiment 1

[0036] A kind of preparation method of carbon dot / chitosan in situ composite material, it comprises following specific steps:

[0037] 1) Preparation of chitosan solution: Add chitosan to distilled water to obtain a chitosan dispersion with a mass concentration of 2.5g / 100mL, then adjust its pH to 4.86 with 0.8M hydrochloric acid solution, 25 o Under magnetic stirring for 9 hours at C, the chitosan is fully dissolved, and its pH is adjusted to 5.60 with 0.8M sodium hydroxide solution to obtain a chitosan solution;

[0038] 2) Preparation of carbon dots / chitosan in situ composite: Take 12 mL of the chitosan solution obtained in step 1), add it to a beaker, and then put it into a household microwave oven with a power of 700W for microwave reaction; the microwave reaction time is 5 minutes , after the reaction is finished, take out the microwave reaction product after natural cooling, then add 24mL distilled water to the microwave reaction product, 25 o After 10 hours of magneti...

Embodiment 2

[0047] A kind of preparation method of carbon dot / chitosan in situ composite material, it comprises following specific steps:

[0048] 1) Preparation of chitosan solution: add chitosan to distilled water to obtain a chitosan dispersion with a mass concentration of 3.0g / 100mL, then adjust its pH to 5.00 with 1.0M hydrochloric acid solution, 30 o Under magnetic stirring for 10 hours at C, the chitosan was fully dissolved, and its pH was adjusted to 6.00 with 1.0M sodium hydroxide solution to obtain a chitosan solution;

[0049] 2) Preparation of carbon dots / chitosan in situ composite: Take 15 mL of the chitosan solution obtained in step 1), add it to a beaker, and then put it into a household microwave oven with a power of 700W for microwave reaction; the microwave reaction time is 6 minutes , after the reaction is finished, take out the microwave reaction product after natural cooling, then add 30mL distilled water to the microwave reaction product, 30 o After 12 hours of magn...

Embodiment 3

[0058] A kind of preparation method of carbon dot / chitosan in situ composite material, it comprises following specific steps:

[0059] 1) Preparation of chitosan solution: Add chitosan to distilled water to obtain a chitosan dispersion with a mass concentration of 2.0g / 100mL, then adjust its pH to 4.50 with 0.5M hydrochloric acid solution, 20 o Under magnetic stirring for 8 hours at C, the chitosan was fully dissolved, and its pH was adjusted to 5.50 with 0.5M sodium hydroxide solution to obtain a chitosan solution;

[0060] 2) Preparation of carbon dots / chitosan in situ composite: Take 10 mL of the chitosan solution obtained in step 1), add it to a beaker, and then put it into a household microwave oven with a power of 700W for microwave reaction; the microwave reaction time is 4 minutes , after the reaction is finished, take out the microwave reaction product after natural cooling, then add 20mL distilled water to the microwave reaction product, 20 o After 8 hours of magnet...

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Abstract

The invention provides a preparation method of a carbon dot/chitosan in-situ composite material. The carbon dot/chitosan in-situ composite material is prepared by an in-situ method. The method comprises the following steps: carrying out microwave treatment on a chitosan solution to obtain a carbon dot/chitosan in-situ complex, and preparing the carbon dot/chitosan in-situ complex into the carbon dot/chitosan in-situ composite material. According to the method, a carbon dot/chitosan in-situ composite film material is prepared by a casting and film-forming method, and a carbon dot/chitosan composite coating material is prepared by a controllable electro-deposition method. The preparation method of the carbon dot/chitosan in-situ composite material has the advantages of being simple, convenient to operate, mild in preparation conditions and easy to control; equipment used by the method is simple and convenient, has energy conservation and environment protection effects, and is low in cost; the carbon dot/chitosan composite film material has good application prospects in the fields of fluorescent biological film materials, optical film materials, biological detectors and fluorescent light-emitting materials. The carbon dot/chitosan composite coating material has good application prospects in the fields of surface decoration and surface patterning of metal biological materials, biological electrodes, biological chips and biological devices.

Description

technical field [0001] The invention belongs to the fields of biomedical materials, nanometer materials, polymer materials and electrochemistry, and in particular relates to a preparation method of carbon dot / chitosan in-situ composite material. Background technique [0002] Carbon dots are a new type of quantum dots, and their particle size is generally below 10nm. Compared with traditional quantum dots (such as cadmium sulfide quantum dots), its basic skeleton is carbon, which has the advantages of non-toxicity, high fluorescence stability and photobleaching resistance, adjustable fluorescence wavelength, good water dispersibility, easy functionalization, biophase Excellent properties such as good capacitance [Journal of Materials Chemistry, 2012, 22(46): 24230-24253]. Therefore, since their discovery in 2004, carbon dots have been widely used in many fields such as biomarkers, bioimaging, drug carriers, biosensors, luminescent materials, and photocatalysis. Chitosan is ...

Claims

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Application Information

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IPC IPC(8): C08L5/08C08K3/04C09K11/65C08J5/18C01B31/02C25D9/02C25D9/08
Inventor 王艺峰王霞耿增华郭雪成郭萌萌熊燕飞
Owner WUHAN UNIV OF TECH
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