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GO@DA/sodium alginate/P(AAc-co-AAm) multifunctional hydrogel and preparation method thereof

A technology of aac-co-aam and sodium alginate, which is applied in the field of GO@DA/sodium alginate/P multifunctional hydrogel and its preparation, can solve the complex application, mechanical performance limitation, and the inability of conductive hydrogel To meet the actual needs of biosensors and other issues, to achieve the effect of simplifying the operation process

Active Publication Date: 2020-07-17
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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  • GO@DA/sodium alginate/P(AAc-co-AAm) multifunctional hydrogel and preparation method thereof
  • GO@DA/sodium alginate/P(AAc-co-AAm) multifunctional hydrogel and preparation method thereof
  • 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 GO@DA / sodium alginate / P (AAc-co-AAm) multifunctional hydrogel and a preparation method thereof. The hydrogel is innovatively prepared by using a one-pot method which comprisesthe following steps: firstly, preparing a graphene oxide (GO) and dopamine hydrochloride (DA) solution with a certain concentration, performing in-situ self-polymerization on DA in a limited space between GO lamellas to obtain a GO@DA dispersion liquid, then adding sodium alginate, stirring and dissolving, dropwise adding a mixed solution of acrylic acid (AAc), acrylamide (AAm), N, N-methylene bisacrylamide (MBAA) and Fe<3+>, uniformly stirring at a high speed, adding an initiator, quickly casting to form a film, and finally reacting for a certain time in an environment of 40-80 DEG C to obtain the GO @DA / sodium alginate / P(AAc-co-AAm) multifunctional hydrogel material. The hydrogel material has excellent mechanical properties, self-adhesion properties, self-healing properties and force sensitivity, and can be used as a conductive matrix material of biosensors and other devices.

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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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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