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Nanocomposite conductive adhesive hydrogel and its preparation method and application

A conductive adhesion and nano-composite technology, applied in the field of flexible sensors, can solve the problems of non-spontaneous adhesion and poor deformation ability, and achieve the effects of improving stability, good tensile deformation performance, and expanding the application range

Active Publication Date: 2021-01-05
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] It can be seen that the above-mentioned flexible sensors have good sensitivity. However, an ideal wearable flexible sensor often needs to have high stretchability and adhesion to irregular surfaces, while the flexible sensors in the prior art Due to the constraints of the base material, its deformation ability is poor, and it cannot spontaneously produce adhesion and large-scale stretching, etc.

Method used

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  • Nanocomposite conductive adhesive hydrogel and its preparation method and application
  • Nanocomposite conductive adhesive hydrogel and its preparation method and application
  • Nanocomposite conductive adhesive hydrogel and its preparation method and application

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preparation example Construction

[0045] The embodiment of the present invention proposes a method for preparing a nanocomposite conductive adhesive hydrogel, comprising the following steps:

[0046] (a) mixing cationic monomers, photoinitiators, anionic components, sulfonated MXene nanoparticles, and water to obtain a precursor solution;

[0047] (b) degassing the above precursor solution;

[0048] (c) irradiating the precursor solution obtained in step (b) with ultraviolet light to initiate cationic monomer polymerization, and the produced cationic monomer polymer interacts with anionic components and nanoparticles to form a hydrogel;

[0049] Wherein, in step (a), the anion component includes glycosaminoglycan and its derivatives.

[0050] The embodiment of the present invention adds cationic monomers and their photoinitiators, anionic components, and sulfonated MXene nanoparticles. Under ultraviolet light triggering, cationic monomers polymerize to form long-chain cationic polymers, while anionic componen...

Embodiment 1

[0098] Example 1 Preparation of Conductive Adhesive Hydrogels

[0099] 1)Na + Preparation of intercalated MXene: Mix 10ml of 9mol / L hydrochloric acid solution with 0.5g of lithium fluoride powder, stir for 5 minutes to obtain an etching solution, add 0.5g of titanium aluminum carbide powder to the etching solution and seal the container, at 35°C Stir for 24 hours for etching; after the etching, centrifuge at 12000 rpm for 5 minutes, pour off the supernatant, then add deionized water to wash, repeat the above steps 8-10 times; after pouring the supernatant for the last time, pour the suspension Add a small amount of 5wt% dilute sodium hydroxide solution and stir for 2 hours, then wash the precipitated powder with a large amount of deionized water until the pH of the centrifuged solution is 7-8, and disperse the obtained slurry into a small amount of deionized water spare;

[0100] 2) Synthesis of sulfanilic acid diazonium salt: suspend 2.1g sulfanilic acid in 10ml deionized...

Embodiment 2

[0106] Example 2 Preparation of Conductive Adhesive Hydrogels

[0107] Same as Example 1, the difference is that in step 4), the concentration of nanoparticles is 0.2wt%.

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Abstract

The invention provides a nano composite conductive adhesive hydrogel, and a preparation method and application thereof, and relates to the field of flexible sensors. The hydrogel is prepared by the following steps: (a) mixing cationic monomers, a photoinitiator, anionic components, sulfonated MXene nanoparticles and water to obtain a precursor solution; (b) defoaming the precursor solution; and (c) irradiating the precursor solution obtained in the step (b) with ultraviolet light to initiate polymerization of the cationic monomers, wherein a generated cationic monomer polymer, the anionic components and the nanoparticles co-act to form the hydrogel. The hydrogel obtained by the invention not only can be well adhered to various complex surfaces and has high stretching performance, self-healing performance and the like, but also has conductive performance, photo-thermal conversion performance and the like, and can be applied to flexible sensors and other fields.

Description

technical field [0001] The invention relates to the field of flexible sensors, in particular to a nanocomposite conductive adhesive hydrogel and a preparation method and application thereof. Background technique [0002] With the development of flexible materials and electronic technology, wearable flexible sensors have attracted great attention of researchers because of their excellent characteristics and can be used to capture and monitor various human activities. [0003] There are two main types of sensitive materials for flexible strain sensors currently being studied: one is a sensor that uses conductive materials such as silver, carbon tubes, and graphene as strain-sensitive materials; the other is a sensor that uses semiconductor materials as strain-sensitive materials. Both have different degrees of development in the field of flexible sensors. [0004] Luo et al. (Luo C, Jia J, Gong Y, et al. Highly Sensitive, Durable, and Multifunctional Sensor Inspired by Spider...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/075C08F251/00C08F220/34C08K9/02C08K9/04C08K3/14G01B7/16G01N27/04
CPCC08F251/00C08J3/075C08J2351/02C08K3/14C08K9/02C08K9/04C08K2201/001C08K2201/011G01B7/18G01N27/041G01N27/048C08F220/34
Inventor 陈莉邓泽鹏何洋江鹏王彦杰
Owner TIANJIN POLYTECHNIC UNIV
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