Flexible wire based on liquid metal and manufacturing method thereof

A liquid metal, flexible wire technology, applied in bendable conductors, manufacturing stretchable conductors/cables, conductors, etc., can solve the problems of low preparation efficiency, influence of electrical conductivity, complicated operation, etc., and achieve simple preparation methods and guaranteed The effect of electrical conductivity and wettability improvement

Active Publication Date: 2022-07-15
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, in the Chinese invention patent CN113096892A "A preparation method of liquid metal wire and liquid metal wire", the liquid metal is injected into the flow channel of the flexible silicone insulating layer, and the prepared liquid metal wire can be bent multiple times without Fatigue fracture occurs; however, the microchannel and liquid metal injection technology used in it is very complicated to operate and the production efficiency is low
The paper "All-Printed Flexible and Stretchable Electronics with Pressing or Freezing Activatable Liquid Metal-Silicone Inks" [Advanced Functional Materials, 2019, 30, 1906683] uses liquid metal-silicone inks to realize liquid metal-based flexible electronics using a multi-material 3D printing process Full printing of the device; however, the device prepared by this process needs to conduct electricity after mechanical activation (pressing or freezing), and the operation is complicated; at the same time, because of the addition of insulating silica gel, the conductivity is also greatly affected

Method used

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  • Flexible wire based on liquid metal and manufacturing method thereof
  • Flexible wire based on liquid metal and manufacturing method thereof
  • Flexible wire based on liquid metal and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] This embodiment provides a liquid metal-based flexible wire and a manufacturing method thereof. The flexible substrate 1 is a composite film of TPU and graphene oxide (GO), the liquid metal conductive pattern 2 is a prepared conductive path, and the encapsulation layer 3 is a TPU film prepared by electrostatic spraying.

[0045] The manufacturing method of this embodiment comprises the following steps:

[0046] S1. First, the graphene oxide (GO) powder is dissolved in dimethylacetamide (DMAC) by ultrasonic, and the GO / TPU precursor mixed solution is obtained by magnetic stirring for 3h after adding TPU. The mass ratio is 0.5%, and the mass ratio of TPU to DMAC is 45%; then the precursor mixed solution is prepared by a spin coating process to obtain a film with a thickness of 200um, thereby completing the preparation of the flexible substrate 1 .

[0047] S2. The gallium-based liquid metal alloy and the Cu nano-powder are mixed together by magnetic stirring (the mass ra...

Embodiment 2

[0052] This embodiment provides a liquid metal-based flexible wire and a manufacturing method thereof. The flexible substrate is a TPU / GO nanofiber film, the liquid metal conductive pattern 2 is a prepared conductive path, and the encapsulation layer 3 is a TPU nanofiber film.

[0053] The manufacturing method of this embodiment comprises the following steps:

[0054] S1. First, the graphene oxide (GO) powder is dissolved in DMAC by ultrasonic, and the GO / TPU precursor mixed solution is obtained by magnetic stirring for 3 hours after adding TPU, wherein the mass ratio of GO and TPU is 0.5%, TPU The mass ratio of DMAC was 45%; the precursor solution was loaded into a syringe, and a GO / TPU nanofiber membrane was prepared by an electrospinning process (12kv, 300ul / h, 15cm).

[0055] S2. The gallium-based liquid metal alloy and the Cu nano-powder are mixed together by magnetic stirring (the mass ratio is 10%) to improve the conductivity and printability of the liquid metal conduc...

Embodiment 3

[0060] This embodiment provides a liquid metal-based flexible wire and a manufacturing method thereof. The flexible substrate 1 is a composite film of PDMS and polyvinyl alcohol resin (PVA), the liquid metal conductive pattern 2 is a prepared conductive path, and the encapsulation layer 3 is a PDMS film prepared by electrostatic spraying.

[0061] The manufacturing method of this embodiment comprises the following steps:

[0062] S1. First, mix the components A and B of the PDMS prepolymer at a ratio of 10:1 to obtain a PDMS solution, and prepare a PDMS film through a spin coating process; dissolve the TPU powder in DMAC (mass ratio is 45%), and stir magnetically for 3h Obtain the TPU solution; through the electrospinning process (12kv, 300ul / h, 15cm), the TPU solution is spray-printed on the above-mentioned PDMS film by the electrospinning process according to the preset trajectory, and finally the PVA solution is directly written on the above-mentioned patterned nanometer. ...

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Abstract

The invention provides a flexible wire based on liquid metal and a manufacturing method thereof, and the method is characterized in that the method comprises the following steps: S1, preparing a flexible substrate through employing a coupling agent and a stretchable polymer; s2, preparing a liquid metal conductive pattern on the flexible substrate; and S3, preparing a packaging layer on the liquid metal conductive pattern. The lead has stretchability and conductivity, and is simple to manufacture.

Description

technical field [0001] The invention relates to a liquid metal-based flexible wire and a manufacturing method thereof, belonging to the technical field of preparation of flexible wires. Background technique [0002] Flexible electronics have great application potential in the fields of soft robotics, OLED, and human surface electronics due to their stretchability, and flexible stretchable wires / electrodes play a decisive role in the development of flexible electronics. At present, the preparation methods of stretchable wires mainly include: 1. The rigid metal materials are prepared into micro-nano sheets or serpentine structures, but this method requires complex preparation processes (photolithography, transfer printing, etc.), and the stretchable range limited (~60%); 2. Mixing nanomaterials (carbon nanotubes, silver nanowires, etc.) into stretchable polymers, but the flexible stretchable wires prepared by this method are highly insulating due to the presence of polymers. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B13/008H01B13/06H01B7/04H01B7/02H01B7/00H05K3/12H05K1/03H05K1/02
CPCH01B13/008H01B13/06H01B7/0027H01B7/04H01B7/02H05K3/1216H05K3/125H05K1/0283H05K1/0393
Inventor 吴德志吴益根许晋滨曾国龙周佳泓陈馨琦
Owner XIAMEN UNIV
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