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Multifunctional self-healing hydrogel and its preparation method and application in the detection of biogenic amines

A self-healing and hydrogel technology, which is applied in the direction of analyzing materials through chemical reactions and observing the impact on chemical indicators, etc., can solve problems such as poor mechanical properties, single function, and long self-healing time. problem, to achieve the effect of short time, expanding application range, and mild gelation conditions

Active Publication Date: 2020-07-28
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a self-healing hydrogel that can completely restore its original properties within 60 seconds at room temperature after destruction, and has a storage modulus of up to 10 4 Pa, the loss modulus is 10 3 Pa, a multifunctional self-healing hydrogel with both pH and ion responsiveness and its preparation method

Method used

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  • Multifunctional self-healing hydrogel and its preparation method and application in the detection of biogenic amines
  • Multifunctional self-healing hydrogel and its preparation method and application in the detection of biogenic amines
  • Multifunctional self-healing hydrogel and its preparation method and application in the detection of biogenic amines

Examples

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Embodiment 1

[0047] A method for preparing a multifunctional self-repairing hydrogel, comprising the steps of:

[0048] (1) Preparation of 5-chloromethyl-2-hydroxy-benzaldehyde (CHBA): Add 50mmol of polyoxymethylene and 100mmol of salicylaldehyde to the flask, place in ice bath, slowly add 84mL of concentrated hydrochloric acid (12mol / L) dropwise, Stir at room temperature for 48 h, wash with deionized water to pH = 7 after the reaction, recrystallize in n-hexane, and dry.

[0049] (2) Preparation of polyethylene glycol dimesylate (DE-PEG): Add 10 mmol polyethylene glycol 4000 and 40 mmol triethylamine to the dichloromethane solution in an ice bath, and slowly add 40 mmol methanesulfonate dropwise Acyl chloride, stirred at room temperature for 48h, removed dichloromethane after the reaction, washed with deionized water, precipitated with ether, and dried.

[0050] (3) Preparation of imidazole-terminated polyethylene glycol (Im-PEG): 10mmol polyethylene glycol dimesylate (DE-PEG), 40mmol im...

Embodiment 2

[0061] A method for preparing a multifunctional self-repairing hydrogel, comprising the steps of:

[0062] (1) Preparation of 5-chloromethyl-2-hydroxy-benzaldehyde (CHBA): Add 50mmol of polyoxymethylene and 100mmol of salicylaldehyde to the flask, place in ice bath, slowly add 42mL of concentrated hydrochloric acid (12mol / L) dropwise, Stir at room temperature for 24 h, wash with deionized water to pH=6 after the reaction, recrystallize in n-hexane, and dry.

[0063] (2) Preparation of polyethylene glycol dimesylate (DE-PEG): under ice bath conditions, 10 mmol polyethylene glycol 800 and 20 mmol triethylamine were added to the acetone solution, and 20 mmol methanesulfonyl chloride was slowly added dropwise, Stir at room temperature for 60 h, remove acetone after the reaction, wash with deionized water, precipitate with ether, and dry.

[0064] (3) Preparation of imidazole-terminated polyethylene glycol (Im-PEG): 10mmol polyethylene glycol dimesylate (DE-PEG), 20mmol imidazole ...

Embodiment 3

[0069] A method for preparing a multifunctional self-repairing hydrogel, comprising the steps of:

[0070](1) Preparation of 5-chloromethyl-2-hydroxy-benzaldehyde (CHBA): Add 50mmol of polyoxymethylene and 150mmol of salicylaldehyde to the flask, place in ice bath, slowly add 70mL of concentrated hydrochloric acid (12mol / L) dropwise, Stir at room temperature for 36 h, wash with deionized water to pH = 7 after the reaction, recrystallize in n-hexane, and dry.

[0071] (2) Preparation of polyethylene glycol dimesylate (DE-PEG): under ice bath conditions, add 10 mmol polyethylene glycol 10000 and 100 mmol triethylamine to the dimethyl sulfoxide solution, slowly drop 100 mmol Methanesulfonyl chloride was stirred at room temperature for 56 hours. After the reaction, dimethyl sulfoxide was removed, washed with deionized water, precipitated with ether, and dried.

[0072] (3) Preparation of imidazole-capped polyethylene glycol (Im-PEG): 2-butanone added to 10mmol polyethylene glycol...

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Abstract

The invention discloses multifunctional self-repairing hydrogel,a preparation method thereof and applicationof themultifunctional self-repairing hydrogelin detection of biogenic amine.The preparationmethod comprises the steps thatpolyethylene glycolendcapped bysalicylaldehydeis taken and dissolved in a buffer solution, fully shocking is conducted at the room temperature, polyethylene imine is added, evenly mixing is conducted, and the self-repairing hydrogel is obtained.After destroying,original performance of the self-repairing hydrogel recovers completely at the room temperature within 60s,a storage modulus reaches 104Pa, a loss modulus is 103Pa, and pH and ion responsiveness functions are achieved together. According to theprepared hydrogel, the excellent mechanical property is achieved, many functions such as rapid self-repair, ion response, pH response and biogenic amine detection are also achieved,the application range of a polyethylene glycol based self-repairing hydrogel material is widened, and the hydrogel is expected to be applied to food storage, self-repairing materials, fluorescent printing and other industries.

Description

technical field [0001] The invention relates to a self-repairing hydrogel, in particular to a multifunctional self-repairing hydrogel, a preparation method thereof and an application in biogenic amine detection. Background technique [0002] Hydrogel is a three-dimensional gel material formed by fixing water molecules in the polymer skeleton through surface tension and capillary force. In recent years, in order to reduce material loss and reduce environmental burden, the research on self-healing hydrogels has become a hot spot. However, most of the existing self-healing hydrogels have the problems of poor mechanical properties, single function, and long self-healing cycle. [0003] In order to solve the problem of poor mechanical properties, there are two commonly used methods; one is to construct a double gel network, and the other is to increase the crosslinking density of the hydrogel. The double-network hydrogel is an interpenetrating network formed by two polymers wit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/24C08J3/075C08L71/02C08L79/02G01N21/78
CPCC08J3/075C08J3/24C08J2371/02C08J2479/02G01N21/78
Inventor 瞿金清廖珊珊汤柳燕
Owner SOUTH CHINA UNIV OF TECH
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