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Preparation method of hydrogel based on polyphenol-silver nano-enzyme with plasma effect

A plasma and silver nanotechnology, applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the difficulties of hydrogel polymerization, Poor mechanical properties, poor electrical conductivity, etc., to achieve stable and efficient catalytic activity, excellent mechanical properties, and good mechanical properties

Inactive Publication Date: 2020-07-03
SOUTHWEST JIAOTONG UNIV
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  • Application Information

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Problems solved by technology

It is widely used in the fields of medicine, chemical industry, food, agriculture and environment, but traditionally prepared nanozymes can only catalyze peroxide alone, with low efficiency and poor stability
[0004] Traditional hydrogels have the problems of difficult polymerization and complicated preparation conditions
And other defects in the preparation process make the hydrogel not well suited to the existing biological and engineering applications.
Such as poor mechanical properties, poor electrical conductivity, no adhesion and no antibacterial properties
Traditional nanozymes catalyze single substrate, low efficiency and poor stability

Method used

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  • Preparation method of hydrogel based on polyphenol-silver nano-enzyme with plasma effect
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  • Preparation method of hydrogel based on polyphenol-silver nano-enzyme with plasma effect

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preparation example Construction

[0025] A method for preparing hydrogel based on polyphenol-silver nanozyme with plasma effect, comprising the following steps:

[0026] Step 1: adding the phenolic hydroxyl compound into the silver ion aqueous solution to form a mixed solution A, the molar ratio of the silver ion and the phenolic hydroxyl compound in the mixed solution A is 87-118:1;

[0027] Wherein the concentration of the phenolic hydroxyl compound solution in the mixed solution A is 0.0017-0.019 mol / L, and the silver ion concentration is 0.1-1 mol / L. The phenolic hydroxyl compound is one of phenol, dopamine, resorcinol, catechol, tannic acid and lignin.

[0028] Step 2: Add a double bond compound solution with a mass concentration of 15% to 45% to the mixed solution A obtained in step 1, and stir well to form a mixed solution B; wherein the volume ratio of the acrylic acid solution to the mixed solution A is 15% to 45%. 30%: 1;

[0029] The double bond compound is one of acrylic acid, acrylamide, hydroxy...

Embodiment 1

[0033] Prepare the hydrogel preparation method based on the polyphenol-silver nanozyme with plasmonic effect according to the following steps:

[0034] Step 1: Add 0.002 g of tannic acid into 10 mL of aqueous solution containing 0.022 g of silver nitrate, and stir for 10 min to form a mixed solution A.

[0035] Step 2: Add 2.7 mL of acrylic acid to the mixed solution A obtained in step 1, and stir evenly to form mixed solution B.

[0036] Step 3: Add 0.07 g of ammonium persulfate to the mixed solution B, stir evenly and let stand to form a gel.

Embodiment 2

[0038] Prepare the hydrogel preparation method based on the polyphenol-silver nanozyme with plasmonic effect according to the following steps:

[0039] Step 1: Add 0.002 g of tannic acid into 10 mL of aqueous solution containing 0.018 g of silver nitrate, and stir for 10 min to form a mixed solution A.

[0040] Step 2: Add 2.7 mL of acrylic acid to the mixed solution A obtained in step 1, and stir evenly to form mixed solution B.

[0041] Step 3: Add 0.07 g of ammonium persulfate to the mixed solution B, stir evenly and let stand to form a gel.

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Abstract

The invention discloses a preparation method of hydrogel based on polyphenol-silver nano-enzyme with a plasma effect. The preparation method comprises the following steps: 1, adding a phenolic hydroxyl group-containing compound into an aqueous silver ion solution to form a mixed solution A, wherein the molar ratio of silver ions to the phenolic hydroxyl group-containing compound in the mixed solution A is (87-118):1; 2, adding a double-bond compound solution with the mass concentration of 15-45% into the mixed solution A obtained in step 1, and fully and uniformly stirring to form a mixed solution B, wherein the volume ratio of the acrylic acid solution to the mixed solution A is (15-30%):1; and 3, adding an initiator into the mixed solution B obtained in step 2, uniformly mixing, and carrying out self-polymerization to obtain the required hydrogel. Only the initiator, a monomer containing double bonds, specific metal ions and the organic matter containing the phenolic hydroxyl groupsare self-polymerized into the gel, and other auxiliary conditions are not needed; and the hydrogel has the advantages of short gelatinizing time, excellent mechanical properties, extremely strong adhesion property, good conductivity and certain antibacterial property.

Description

technical field [0001] The invention relates to the technical field of biomaterials, in particular to a method for preparing a polyphenol-silver nanozyme hydrogel based on plasma effects. Background technique [0002] Adhesive, conductive, and antibacterial hydrogels have a wide range of applications, from tissue repair to wound dressings and soft bioelectronics. One of the major challenges in this field is the preparation of functional hydrogels that rely on free radical polymerization, which involves a series of complex processes and requires external stimuli to induce gel formation, such as UV irradiation or triggered by temperature, which This process hinders practical clinical application. Therefore, in situ gelation via free radical polymerization without external assistance is a new strategy for preparing multifunctional self-curing hydrogels. [0003] Natural enzymes can catalyze free radical polymerization to form hydrogels. However, natural enzymes are unstable a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F120/06C08J3/075C08L33/02C08K3/08B01J23/50B01J31/06
CPCC08F120/06C08J3/075B01J23/50B01J31/06C08J2333/02C08K2003/0806C08K2201/011C08K2201/001B01J35/23B01J35/39
Inventor 鲁雄吕炫汉贾占荣谢超鸣
Owner SOUTHWEST JIAOTONG UNIV
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