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Conductive polymer composite material and its 3D printing forming method

A technology of conductive polymers and polymer materials, which is applied in the direction of conductive materials dispersed in non-conductive inorganic materials, additive processing, processing and manufacturing, etc., and can solve problems such as increasing the viscosity of polymer melts and 3D printing processing difficulties

Active Publication Date: 2022-07-12
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, a large amount of filler needs to be added during the preparation process to make the filler form a network structure in the polymer matrix and realize the function of the filler. However, a high concentration of filler will increase the viscosity of the polymer melt and cause difficulties in 3D printing processing.

Method used

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  • Conductive polymer composite material and its 3D printing forming method
  • Conductive polymer composite material and its 3D printing forming method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1) Using thermoplastic polyurethane (TPU) as the printing substrate, during the printing and forming process, every 2 layers of printing is coated with 1 layer of conductive silver paste, and the coating thickness of each layer of conductive silver paste is 1.2 wedge-shaped groove thickness, followed by A total of 8 layers are printed, and 3 layers of silver glue are applied;

[0020] 2) Finally, a cuboid spline with a length of 8cm, a width of 1cm and a thickness of 0.08cm is formed;

[0021] 3) Using Keithley 2450 touch-type digital source meter, the measured spline resistance in the length direction is 3.22Ω, the resistance in the width direction is 2.46Ω, and the resistance in the thickness direction is infinite, showing excellent two-dimensional orientation conductivity; connected to the circuit , can make the small light bulb glow, as attached figure 2 shown; the magnetic shielding effect in the X-band is 15dB;

[0022] 4) Using MU3001B tensile machine to test ...

Embodiment 2

[0024] 1) Using thermoplastic polyurethane (TPU) as the printing substrate, during the printing and forming process, every 4 layers are printed, and 1 layer of conductive silver paste is applied, and the coating thickness of each layer of conductive silver paste is 1.2 wedge-shaped groove thickness, in turn A total of 8 layers are printed, and 1 layer of silver glue is applied;

[0025] 2) Finally, a cuboid spline with a length of 8cm, a width of 1cm and a thickness of 0.08cm is formed;

[0026] 3) Using Keithley 2450 touch-type digital source meter, the resistance in the length direction of the sample is 4.97Ω, the resistance in the width direction is 3.82Ω, and the resistance in the thickness direction is infinite, showing excellent two-dimensional orientation conductivity; In the circuit, the light bulb can be made to emit light;

[0027] 4) Use MU3001B tensile machine to test the tensile properties of the splines: compared with the splines without the silver glue coating,...

Embodiment 3

[0029] 1) Using thermoplastic polyurethane (TPU) as the printing substrate, in the process of printing and forming, every 2 layers of printing is coated with a thin layer of carbon nanotube ink, and the coating thickness of each layer of carbon nanotube ink is 1.2 wedge-shaped grooves Thickness, print a total of 8 layers in turn, and apply 3 layers of carbon nanotube ink;

[0030] 2) Finally, a cuboid spline with a length of 8cm, a width of 1cm and a thickness of 0.08cm is formed;

[0031] 3) Using Keithley 2450 touch-type digital source meter, the resistance of the sample in the length direction is 3.49Ω, the resistance in the width direction is 2.5Ω, and the resistance in the thickness direction is infinite, showing two-dimensional orientation conductivity; When the direction is connected to the circuit, it can make the light bulb emit light; the magnetic shielding effect in the X-band is 32dB;

[0032] 6) Using MU3001B tensile machine to test the tensile properties of the ...

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Abstract

The invention discloses a new conductive polymer composite material and a 3D printing molding method thereof. Its main technical feature is the combination of 3D printing and physical coating. Specifically, using a polymer material that can be used for 3D printing as the base material, during the 3D printing molding process, a conductive filler is coated on the inner layer of the printed sample, so that the filler forms a network on the inner layer of the polymer substrate to obtain a conductive function. The polymer composite materials can be used in anti-static, electrical conductivity, electromagnetic shielding and other fields. The biggest advantage of this invention is that the maximum functionalization of the composite material can be achieved by using very few conductive fillers, which not only saves costs, but also improves the mechanical properties of the composite material on the original basis; in addition, because the filler is inside the substrate Forming a network, changes in the external environment do not affect the function and application of composite materials.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and relates to the technical field of conductive polymer composite materials and their preparation, in particular to the field of 3D printing of polymer materials, and the technical field of preparation of a conductive polymer composite material formed by 3D printing. Background technique [0002] With the rapid development of society and the rapid prototyping of new materials, 3D printing has emerged with the times, and its extremely innovative and experimental nature will surely become the core and main processing technology of future product design. However, at present, there are very few materials designed and formed using 3D printing technology (CN201711141801.X; CN201711345348.4; CN201510922362.0), which has seriously affected the development process of 3D printing technology. Therefore, using 3D printing technology to design new products is a The need for the development of 3D...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C64/10H01B1/22H01B1/24G01D21/02B33Y10/00
CPCB29C64/10H01B1/22H01B1/24G01D21/02B33Y10/00
Inventor 聂华荣贺爱华韩小龙
Owner QINGDAO UNIV OF SCI & TECH