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High-performance hydrogel-nanofiber-based wearable friction generator and preparation method thereof

A triboelectric generator and nanofiber technology, applied in the field of materials, can solve the problems of reduced accuracy and stability of biomechanical signals, limited power output performance of stretchable equipment, poor biocompatibility, etc., and achieves a simple and high-quality preparation method. Good stretchability and adhesion

Pending Publication Date: 2022-03-22
CHINA NANHU ACAD OF ELECTRONICS & INFORMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the power output performance of most existing stretchable devices is limited (typically below 100 V) due to the low surface roughness.
Furthermore, traditional stretchable electrode materials (conductive fillers / intrinsically elastic polymers), such as carbon black, silver nanowires, carbon nanotubes, graphene / polydimethylsiloxane composites, are poor in biocompatibility, Poor adhesion makes it difficult to fit the human skin perfectly, resulting in greatly reduced accuracy and stability of bio-electromechanical signals. Therefore, it is urgent to develop a high-performance stretchable triboelectric device that is easy to manufacture and has good biocompatibility.

Method used

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  • High-performance hydrogel-nanofiber-based wearable friction generator and preparation method thereof
  • High-performance hydrogel-nanofiber-based wearable friction generator and preparation method thereof
  • High-performance hydrogel-nanofiber-based wearable friction generator and preparation method thereof

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Embodiment 1

[0059] The preparation method of the high-performance hydrogel-nanofiber-based wearable triboelectric generator of the present invention comprises the following steps: preparing 5 mL of LiCl aqueous solution with a concentration of 8 mol / L, adding acrylamide powder so that the mass concentration of acrylamide is 14wt% ; Then add N, N'-methylenebisacrylamide, N, N, N', N'-tetramethylethylenediamine and potassium persulfate each 0.001g to obtain a mixed solution; the prepared mixed solution is transferred to 3D Print the mold and place it at room temperature for 24 hours to form a conductive hydrogel; refer to figure 1 , put ethanol in the Erlenmeyer flask, put the mouth of the balloon on the mouth of the Erlenmeyer bottle, adhere the conductive hydrogel to the surface of the balloon on the mouth of the Erlenmeyer bottle, heat the Erlenmeyer flask to volatilize the ethanol, and use the volatilized ethanol The expansion of the balloon drives the stretching of the conductive hydro...

Embodiment 2

[0063] The preparation method of the high-performance hydrogel-nanofiber-based wearable triboelectric generator of the present invention comprises the following steps: preparing 5 mL of KCl aqueous solution with a concentration of 8 mol / L, adding acrylamide powder so that the mass fraction of acrylamide is 14wt% ; Then add N, N'-methylenebisacrylamide, N, N, N', N'-tetramethylethylenediamine and potassium persulfate each 0.001g to obtain a mixed solution; the prepared mixed solution is transferred to 3D Print the mold and place it at room temperature for 24 hours to form a conductive hydrogel; refer to figure 1 , put ethanol in the Erlenmeyer flask, put the mouth of the balloon on the mouth of the Erlenmeyer bottle, adhere the conductive hydrogel to the surface of the balloon on the mouth of the Erlenmeyer bottle, heat the Erlenmeyer flask to volatilize the ethanol, and use the volatilized ethanol The expansion of the balloon drives the stretching of the conductive hydrogel; t...

Embodiment 3

[0065] A high-performance hydrogel-nanofiber-based wearable triboelectric generator proposed by the present invention includes a hydrogel-nanofiber composite film layer, an encapsulation unit and a copper electrode;

[0066] The hydrogel-nanofiber composite film layer is composed of a conductive hydrogel layer and a nanofiber layer formed on the conductive hydrogel layer; the conductive hydrogel layer is composed of an acrylamide ion-conductive hydrogel The conductive ionic salt is sodium chloride; the nanofiber layer is prepared from polylactic acid through electrospinning technology, and is wrinkled in a natural state;

[0067] refer to figure 2 , the encapsulation part comprises the top surface of the encapsulation part, the bottom surface of the encapsulation part and the side face of the encapsulation part, the top surface of the encapsulation part, the bottom surface of the encapsulation part and the side face of the encapsulation part form a cavity, and the hydrogel-na...

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Abstract

The invention discloses a high-performance hydrogel-nanofiber-based wearable friction generator. The high-performance hydrogel-nanofiber-based wearable friction generator comprises a hydrogel-nanofiber composite film layer, a packaging part and an electrode, the hydrogel-nanofiber composite film layer is composed of a conductive hydrogel layer and a nanofiber layer formed on the conductive hydrogel layer; the nanofiber layer is in a wrinkle shape in a natural state; the packaging part is internally provided with a cavity, the hydrogel-nanofiber composite film layer is arranged in the cavity of the packaging part, and a gap exists between a nanofiber layer on the hydrogel-nanofiber composite film layer and the packaging part; air holes are formed in the side surface of the packaging part; one end of the electrode is connected with the hydrogel-nanofiber composite film layer, and the other end of the electrode penetrates through the packaging part to be connected with an external circuit.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a preparation method of a high-performance hydrogel-nanofiber-based wearable triboelectric generator. Background technique [0002] In recent years, triboelectric nanogenerators (TENGs) have emerged as an efficient and promising power source for harvesting electrical energy from surrounding mechanical motion. Most human activities involve tensegrity joint motion, yet existing contact-separation TENGs are not suitable for harvesting such biomechanical energy. The development of stretchable TENGs may address this limitation and make them suitable for wearable electronics. Recently, numerous efforts to fabricate stretchable TENGs using various methods have been reported. For example, Wang et al. proposed an innovative multilayer elastomer TENG with closely-packed arched structures as basic functional units (Adv. Energy Mater. 7(2017) 201602832.). Sun et al. fabricated a transpa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N1/04C08J3/075C08L33/26D01F6/14D01F6/60D01F6/62D01F8/12
CPCH02N1/04C08J3/075D01F6/14D01F6/60D01F6/625D01F8/12C08J2333/26
Inventor 戚佳斌
Owner CHINA NANHU ACAD OF ELECTRONICS & INFORMATION TECH
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