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Preparation method and application of self-recognition damage type light detection self-healing hydrogel

A self-healing and hydrogel technology, applied in chemical instruments and methods, nano-optics, luminescent materials, etc., can solve the problems of large-scale synthesis with great difficulty, achieve improved self-healing performance, good fluorescence effect, and preparation The effect of simple method

Inactive Publication Date: 2020-12-15
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the introduction of luminescent molecular groups is required to produce optical properties in the matrix, but the large-scale synthesis of such chromophores is extremely difficult. Therefore, the development of easily synthesized luminescent hydrogels has applications in optical damage measurement, biomaterials, tissue engineering is of great significance

Method used

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  • Preparation method and application of self-recognition damage type light detection self-healing hydrogel
  • Preparation method and application of self-recognition damage type light detection self-healing hydrogel
  • Preparation method and application of self-recognition damage type light detection self-healing hydrogel

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Preparation of self-recognition damage-based self-healing hydrogel based on photodetection

[0038] S1: At room temperature, weigh 25mL of acrylic acid into a three-necked flask, and weigh 1.5g of FeCl respectively 3 ·6H 2 O, 0.45g of ammonium persulfate and 1.5g of acrylamide were dissolved in 50mL of 10% glycerol aqueous solution. After it is completely dissolved, add it to a three-necked flask, stir evenly, and in a nitrogen atmosphere, at room temperature, mechanically stir for 4 hours (stirring speed 600r / min), and place the solution in a mold for 2 hours to prepare a molded self-healing water gel.

[0039] S2: Dissolve 1.50g of citric acid in 30mL of formamide and 20mL of deionized water to obtain a colorless and transparent solution; then transfer the colorless and transparent uniform solution to a 100mL polytetrafluoroethylene reactor at 180°C React for 5 hours; wait for the reaction kettle to cool naturally to room temperature, centrifuge the dark red soluti...

Embodiment 2-9

[0042] S1-S2 steps are identical with embodiment 1, and the quality of fluorescent carbon quantum dot particle in S3 process, the volume of deionized water, and soaking time are shown in Table 1, and others are identical with embodiment 1.

[0043] S3 process parameter in the embodiment 1-9 of table 1

[0044] Example Mass of fluorescent carbon quantum dot particles / g Deionized water / mL Soaking time / h 1 1 100 4 2 2 100 4 3 3 100 4 4 4 100 4 5 5 100 4 6 3 100 2 7 3 100 6 8 3 100 8 9 3 100 10

Embodiment 10

[0048] The photodetection self-healing hydrogel obtained in Example 1 and the photodetection self-healing hydrogel obtained in Example 1 after external force damage and self-healing were subjected to a mechanical test. figure 1 The original tensile stress of the self-healing hydrogel detected by visible light is 1.19 MPa, and the tensile strain is 1650%. The tensile stress of the hydrogel at the initial stage of self-healing is 0.85MPa, and the tensile strain is 1450%. Restore its original mechanical properties within 15 minutes.

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Abstract

The invention discloses a preparation method and application of self-recognizable damage type optical detection self-healing hydrogel, and belongs to the technical field of polymer hydrogel. The preparation method comprises the following steps: soaking self-healing hydrogel into a solution of water-soluble fluorescent quantum dots to obtain the optical detection self-healing hydrogel, wherein theself-healing hydrogel is obtained by dissolving acrylic acid, ferric trichloride hexahydrate, acrylamide and potassium persulfate into a glycerol aqueous solution and reacting; and the water-soluble fluorescent quantum dots are luminescent materials combined with the self-healing hydrogel through hydrogen bonds. The photo-detection self-healing hydrogel not only has high mechanical strength and excellent self-healing performance, but also has adjustable and concealed fluorescence characteristics, and has great potential in the fields of tissue engineering coatings, sensing, self-recognition damage and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer hydrogels, and in particular relates to a preparation method and application of a self-identifying damage-type photodetection self-healing hydrogel. Background technique [0002] Self-healing hydrogels have a certain self-healing ability, but it is still challenging to prepare them using existing methods that can quickly self-heal at room temperature without external stimuli. In particular, compounding self-healing materials with optical response properties has extremely high application potential in many fields. However, the introduction of luminescent molecular groups is required to produce optical properties in the matrix, but the large-scale synthesis of such chromophores is extremely difficult. Therefore, the development of easily synthesized luminescent hydrogels has applications in optical damage measurement, biomaterials, Tissue engineering is of great significance. Contents of the inve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08L33/02C08K3/04C08K3/16C08F220/06C08F220/56G01N21/64G01B7/16C09K11/59C09K11/65C09K11/02B82Y20/00
CPCB82Y20/00C08F220/06C08J3/075C08J2333/02C08K3/04C08K3/16C09K11/025C09K11/59C09K11/65G01B7/16G01N21/64C08F220/56
Inventor 李孟宇陈昊解国新
Owner TSINGHUA UNIV
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