Stretchable transient wire and preparation method thereof

A wire and transient technology, applied in the field of preparation of composite films based on silver microsheets and gelatin, can solve the problems of high processing cost and long dissolution time, and achieve a product that can withstand external stress, simple processing technology, and controllable dissolution speed Effect

Active Publication Date: 2020-06-19
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current production of transient metal wires usually uses complex processes such as electron beam evaporation, magnetron sputtering, and photolithography to obtain nanometer-sized graphics, which has high processing costs, and the dissolution time of metal wires made by this method is as long as several sky
On the other hand, transient devices suitable for in vivo implantation are often subjected to bending or stretching to a certain extent, while stretchable transient wires have not been reported.

Method used

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  • Stretchable transient wire and preparation method thereof
  • Stretchable transient wire and preparation method thereof
  • Stretchable transient wire and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0023] In this example, the polyvinylpyrrolidone solution with a mass fraction of 20% is blended with the silver microflake powder at a mass ratio of 5:1, and the other procedures are consistent with those in Example 1.

[0024] The transient wire prepared in this example was placed in an aqueous solution at 60°C as Figure 4 As shown, due to the higher temperature and the higher content of polyvinylpyrrolidone, the dissolution rate is accelerated, and the transient wire has been decomposed in about 2 minutes and the gelatin is completely dissolved in water.

Embodiment 3

[0026] In this example, the polyvinylpyrrolidone solution with a mass fraction of 20% was blended with the silver microflake powder at a mass ratio of 15:7, and the other procedures were consistent with those in Example 1.

[0027] The transient wire in this example is clamped on the clamp of the stretching rod, the stretching speed is set to 1.25mm / s, the maximum stretching strain is set to 20%, 30% and 50% respectively, and 100 cycles of stretching are carried out. Stretch / release, the change in resistance when the strain reaches 0% after each cycle is as Figure 5 shown. This embodiment has excellent electrical conductivity (R=4Ω), and after 100 cycles of stretching / releasing at 50% stress, the resistance only doubles, showing excellent stability under external stress.

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Abstract

The invention discloses a stretchable transient wire and a preparation method thereof. According to the invention, a micron silver sheet and hydrogel are respectively used as a conductive pattern anda substrate material to prepare the stretchable transient wire, and technical problems in manufacturing of a transient electronic device are solved. Furthermore, a composite material of the micron silver sheet and polyvinylpyrrolidone is used for manufacturing the conductive pattern, and the electrical property and the dissolution rate of the conductive pattern are regulated and controlled by adjusting a ratio of the micron silver sheet to polyvinylpyrrolidone. Meanwhile, reversible hydrogel gelatin is used as the stretchable substrate material, and an OH bond of the gelatin and a C=O bond inpolyvinylpyrrolidone act to obtain an interface with good binding force. The prepared transient wire is controllable in dissolving speed, can bear external stress, is simple in processing technology,and has wide prospects in solving the problem of electronic waste and application in organisms.

Description

technical field [0001] The invention relates to a stretchable transient wire and a manufacturing method. In particular, it relates to a preparation technology based on silver (Ag) microsheet and gelatin composite film. Background technique [0002] With the rapid development of the information society, the use and scrapping of various electronic products continue to increase. These electronic wastes are buried in the soil, and the long-term release of toxic substances pollutes the soil and groundwater, which has become an important problem threatening human society. Transient electronic technology is a new method of manufacturing electronic devices. Devices made by this method can spontaneously decompose or disappear in the environment under external triggers. There are potential applications in areas such as security. Metallic wires are crucial components in transient electronic devices, however, there are some problems with existing technologies. The current production ...

Claims

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Application Information

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IPC IPC(8): C08J7/044C08L89/00C08L39/06C08K7/00C08K3/08
CPCC08J2389/00C08J2439/06C08K7/00C08K2003/0806C08K2201/001
Inventor 丁苏江智
Owner HANGZHOU DIANZI UNIV
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