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Flexible electronic skin capable of sensing pressure and preparation method thereof

An electronic skin and pressure-sensing technology, which is applied in the field of flexible sensors, can solve the problems of capacitive pressure sensor interference and lower sensitivity, and achieve the effects of avoiding shedding and loosening, simplifying the preparation process, and small diameter

Inactive Publication Date: 2019-02-05
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Flexibility Although there are many types of e-skins, highly flexible ones for contact pressure magnitude and position measurement are the most challenging of them all
Capacitive pressure sensors are susceptible to interference from external capacitance signals
And because the human body itself contains capacitance, it cannot be in direct contact with the human body.
In addition, among the sensors that have been disclosed about flexible electronic skin, for example, patent CN205175585U discloses a flexible electronic skin for measuring contact pressure and patent CN105326495A discloses a method of manufacturing and using a wearable flexible skin electrode, Both require additional bonding materials to combine additional electrode wire sensing units, which not only limits its use, but also reduces its sensitivity

Method used

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  • Flexible electronic skin capable of sensing pressure and preparation method thereof
  • Flexible electronic skin capable of sensing pressure and preparation method thereof
  • Flexible electronic skin capable of sensing pressure and preparation method thereof

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preparation example Construction

[0025] The embodiment of the present invention also provides a method for preparing a flexible electronic skin capable of sensing pressure, including the following steps:

[0026] S1, preparing the conductive fiber 11.

[0027] Further, the conductive fiber 11 may be a metal conductive wire, such as a conductive wire made of gold, silver, or copper, and such a conductive wire material is easy to obtain. Alternatively, the conductive fiber 11 may also be formed by coating the surface of the base fiber with a first conductive material. Wherein, the first conductive material is selected from one of metal nanoparticles, metal nanowires, carbon materials or conductive polymers. The material of the metal nano particles and the metal nano wire is one of gold, silver, copper or zinc. The conductive polymer is selected from one or more of polyaniline, polythiophene, polypyrrole, polyaniline derivative, polythiophene derivative and polypyrrole derivative.

[0028] Further, the matrix fiber ...

Embodiment 1

[0047] The flexible electronic skin capable of sensing pressure provided in this embodiment is manufactured according to the following steps:

[0048] (1) Preparation of conductive fibers: In this implementation, silver nanowires are used as the first conductive material, and silk protein is used as the matrix fiber to prepare conductive fibers. The specific steps are: reducing AgNO with triol 3 The silver nanowire solution is prepared by the method, and the silver nanowire solution is dripped on the surface of the silk fiber, dried at room temperature, and repeated three times to prepare a conductive fiber.

[0049] (2) Preparation of conductive elastomer material: In parts by weight, 3 parts of carbon black material and 30 parts of PDMS prepolymer are mixed at a stirring speed of 100 r / min for 20 minutes to obtain a first mixed solution. Then, 30 parts of the crosslinking agent was added to the first mixed solution and mixed for 3 minutes at a stirring speed of 120 r / min to obtai...

Embodiment 2

[0053] This embodiment provides a flexible electronic skin capable of sensing pressure, which is different from Embodiment 1 in:

[0054] Step (1) Preparation of conductive fibers: In this embodiment, graphene is used as the first conductive material, and silk protein is used as the matrix fiber to prepare conductive fibers. The graphene oxide solution was prepared by the Hummers method, and the solution was configured to be 10 mg / ml, and it was evenly dripped on the surface of the silk fiber, and then the graphene oxide on the surface of the silk fiber was reduced to graphene by hydrazine hydrate steam to obtain conductive fiber.

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Abstract

The invention provides a flexible electronic skin capable of sensing pressure and a preparation method thereof, relates to the technology field of flexible sensors. The flexible electronic skin is interwoven by a plurality of conductive yarns and forms a fabric structure. The conductive yarn comprises a conductive fiber as an inner core and a conductive elastomer material coated on the surface ofthe conductive fiber. The flexible electronic skin uses the conductive fiber as an electrode material and the conductive elastomer material layer as a sensitive material layer, and uses contact resistance change of warp and weft interlacing points of the conductive yarns as a signal for sensing pressure. The invention also provides a preparation method of the flexible electronic skin capable of sensing pressure. The prepared flexible electronic skin has good stability and high sensitivity, and does not need to introduce an external electrode, and can be directly woven into a textile, or used for mechanical sensing of the surface of a robot arm and a human prosthetic.

Description

Technical field [0001] The invention relates to the technical field of flexible sensors, and in particular to a flexible electronic skin capable of sensing pressure and a preparation method thereof. Background technique [0002] Electronic skin has become more and more widely used in wearable devices, robots, and prostheses, and has become a development trend in flexible electronic products. Flexibility Although there are many types of electronic skins, the high flexibility used to measure contact pressure and position is the most challenging. Capacitive pressure sensors are susceptible to interference from external capacitance signals. And since the human body itself contains electric capacity, it cannot be in direct contact with the human body. In addition, among the sensors that have been disclosed about flexible electronic skin, for example, the flexible electronic skin for measuring contact pressure disclosed in patent CN205175585U and the manufacturing and using method of...

Claims

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Application Information

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IPC IPC(8): G01L1/18D06M11/83D06M11/74D06M15/643D06M101/10
CPCD06M11/74D06M11/83D06M15/643D06M2101/10G01L1/18
Inventor 刘向阳吴荣辉马丽芸
Owner XIAMEN UNIV
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