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A kind of go@da/sodium alginate/p(aac-co-aam) multifunctional hydrogel and preparation method thereof

An aac-co-aam, sodium alginate technology, applied in the field of GO@DA/sodium alginate/P multifunctional hydrogel and its preparation, can solve the application complexity, skin surface inflammation, conductive hydrogel Unable to meet the actual needs of biosensors and other problems, to achieve the effect of simplifying the operation process

Active Publication Date: 2021-04-30
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the further development of research, single-functional conductive hydrogels have been unable to meet the actual needs of biosensors, etc.
For example, many conductive hydrogel materials using conductive polymers as conductive components, due to the influence of rigid molecular chains of conductive polymers (such as polyaniline, polypyrrole, etc.), their mechanical properties are greatly limited; The gel cannot directly adhere to the surface of the human body or the substrate, and needs to be fixed with adhesive tape, etc., which will complicate its application to a large extent, and easily cause inflammation on the skin surface; more importantly, the conductive hydrogel It must have excellent use stability, self-healing performance and biocompatibility to meet the requirements of actual use, and can also greatly extend the service life of the hydrogel and reduce the cost of use

Method used

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  • A kind of go@da/sodium alginate/p(aac-co-aam) multifunctional hydrogel and preparation method thereof
  • A kind of go@da/sodium alginate/p(aac-co-aam) multifunctional hydrogel and preparation method thereof
  • A kind of go@da/sodium alginate/p(aac-co-aam) multifunctional hydrogel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0028] 1) First use 0.02g GO and 10mg DA to make 20ml aqueous solution, self-polymerize under vigorous stirring to obtain GO@DA dispersion;

[0029] 2) Add 0.05g sodium alginate to the dispersion liquid in step 1), fully stir and dissolve, then add dropwise 6g AAc, 1gAAm, 0.105g MBAA and 0.05g Fe(NO 3 ) 3 9H 2 O mixed solution, vigorously stirred evenly;

[0030] 3) Add 0.225g of ammonium persulfate to the solution in step 2), stir evenly, cast in a mold, transfer to 60°C for reaction, and obtain GO@DA / sodium alginate / P(AAc-co-AAm) Multifunctional hydrogel.

[0031] 4) The tensile strength, elongation at break, electrical conductivity, and adhesion strength of the gel are 148 kPa, 1403%, 2.58 S / m, and 13.7 kPa, respectively, and it has self-healing ability.

example 2

[0033] 1) First use 0.02g GO and 40mg DA to make 20ml aqueous solution, self-polymerize under vigorous stirring to obtain GO@DA dispersion;

[0034] 2) Add 0.05g sodium alginate to the dispersion liquid in step 1), fully stir and dissolve, then add dropwise 6g AAc, 1gAAm, 0.105g MBAA and 0.05g Fe(NO 3 ) 3 9H 2 O mixed solution, vigorously stirred evenly;

[0035] 3) Add 0.360g of ammonium persulfate to the solution in step 2), stir evenly, cast in a mold, transfer to 60°C for reaction, and obtain GO@DA / sodium alginate / P(AAc-co-AAm) Multifunctional hydrogel.

[0036] 4) The tensile strength, elongation at break, electrical conductivity, and adhesion strength of the gel are 96 kPa, 1621%, 3.07 S / m, and 15.9 kPa, respectively, and it has self-healing ability. Compared with Example 1, as the amount of DA increases, the tensile strength of the gel decreases, while the electrical conductivity, elongation at break and adhesive strength increase.

example 3

[0038] 1) First use 0.02g GO and 40mg DA to make 20ml aqueous solution, self-polymerize under vigorous stirring to obtain GO@DA dispersion;

[0039] 2) Add 0.15g sodium alginate to the dispersion liquid in step 1), fully stir and dissolve, then add dropwise 6g AAc, 1gAAm, 0.105g MBAA and 0.05g Fe(NO 3 ) 3 9H 2 O mixed solution, vigorously stirred evenly;

[0040] 3) Add 0.360g of ammonium persulfate to the solution in step 2), stir evenly, cast in a mold, transfer to 60°C for reaction, and obtain GO@DA / sodium alginate / P(AAc-co-AAm) Multifunctional hydrogel.

[0041]4) The tensile strength, elongation at break, electrical conductivity, and adhesion strength of the gel are 347 kPa, 1181%, 2.26 S / m, and 32.5 kPa, respectively, and it has self-healing ability. Compared with Example 2, as the amount of sodium alginate increased, the tensile strength and adhesive strength of the gel were enhanced, but the electrical conductivity and elongation at break decreased.

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Abstract

The invention discloses a GO@DA / sodium alginate / P(AAc-co-AAm) multifunctional hydrogel and a preparation method thereof. The hydrogel is innovatively prepared by a one-pot method: firstly, a certain concentration of graphene oxide (GO) and dopamine hydrochloride (DA) solutions are prepared, so that DA can be obtained by in-situ self-polymerization in the limited space between GO sheets. GO@DA dispersion; after adding sodium alginate and stirring to dissolve, acrylic acid (AAc), acrylamide (AAm), N,N-methylenebisacrylamide (MBAA) and Fe were added dropwise 3+ Mix the solution; stir evenly at high speed, add initiator, quickly cast to form a film, and finally react at 40-80 °C for a certain period of time to obtain GO@DA / sodium alginate / P(AAc-co-AAm) multifunctional hydrogel glue material. The hydrogel material has excellent mechanical properties, self-adhesion properties, self-healing properties and force-sensing properties, and can be used as a conductive matrix material for devices such as biosensors.

Description

technical field [0001] The invention belongs to the field of multifunctional hydrogel preparation, and in particular relates to a GO@DA / sodium alginate / P(AAc-co-AAm) multifunctional hydrogel which can be used in biosensors and a preparation method thereof. Background technique [0002] Conductive hydrogels have attracted extensive attention from scientists due to their potential applications in electronic skin, human motion monitoring, and personal health diagnosis. However, with the further development of research, single-functional conductive hydrogels have been unable to meet the actual needs of biosensors and the like. For example, many conductive hydrogel materials using conductive polymers as conductive components, due to the influence of rigid molecular chains of conductive polymers (such as polyaniline, polypyrrole, etc.), their mechanical properties are greatly limited; The gel cannot directly adhere to the surface of the human body or the substrate, and needs to b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F251/00C08F283/00C08F220/06C08F220/56C08F222/38C08K3/04C08J3/24C08J3/075C08L33/02C08L5/08C08L79/04
CPCC08F251/00C08F283/00C08J3/075C08J3/246C08J2333/02C08J2405/08C08J2479/04C08K3/042C08F220/06
Inventor 金晓强姜慧虹张智铭鲍晓炯乔丰慧胡巧玲
Owner ZHEJIANG UNIV
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