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High-toughness polymer-based temperature-sensitive composite material, and preparation method and application thereof

A technology of polymer materials and composite materials, which is applied in the field of high-toughness and high-sensitivity polymer-based temperature-sensitive composite materials and its preparation, can solve the problems of limiting the application prospects of conductive polymer composite materials and slow temperature response time, and achieve good results. Toughness, increased temperature response speed, and low percolation value

Active Publication Date: 2020-12-01
SHAANXI SCI TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the current research on polymer-based conductive composites, the addition of graphene, multi-walled carbon nanotubes or metal powder often shows the PTC effect, and the temperature response time is slow, which greatly limits the application prospects of conductive polymer composites.

Method used

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  • High-toughness polymer-based temperature-sensitive composite material, and preparation method and application thereof
  • High-toughness polymer-based temperature-sensitive composite material, and preparation method and application thereof
  • High-toughness polymer-based temperature-sensitive composite material, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1) Dry the PLA particles in vacuum at 70°C for 24 hours; put 100 parts by weight of PLA into an internal mixer for blending, the blending time is 5 minutes, the speed is 50rpm, and the processing temperature is 180°C;

[0034] 2) In order to verify the processing modification, the polylactic acid was injected with HAAKE MiniJet Pro mini injection molding equipment: the injection pressure was 450bar, the melt temperature was 180°C, and the mold temperature was 100°C; the mechanical properties of the obtained samples were tested , and the results are shown in Table 1.

Embodiment 2

[0036] 1) Dry the PLA particles in vacuum at 70°C for 24 hours; put 100 parts by weight of PLA, 0.3 parts by weight of DCP and 0.2 parts by weight of PEGDA into an internal mixer for blending, the blending time is 5 minutes, and the speed is 50 rpm. The temperature is 180°C;

[0037] 2) In order to verify the processing modification, the polylactic acid was injected with HAAKE MiniJet Pro mini injection molding equipment: the injection pressure was 450bar, the melt temperature was 180°C, and the mold temperature was 100°C; the mechanical properties of the obtained samples were tested , and the results are shown in Table 1.

Embodiment 3

[0039] 1) Dry the PLA particles in vacuum at 70°C for 24 hours; put 100 parts by weight of PLA, 0.3 parts by weight of DCP and 0.4 parts by weight of PEGDA into an internal mixer for blending, the blending time is 5 minutes, and the speed is 50 rpm. The processing temperature is 180°C;

[0040]2) In order to verify the processing modification, the polylactic acid was injected with HAAKE MiniJet Pro mini injection molding equipment: the injection pressure was 450bar, the melt temperature was 180°C, and the mold temperature was 100°C; the mechanical properties of the obtained samples were tested , and the results are shown in Table 1.

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Abstract

The invention belongs to the technical field of polymer conductive composite materials, and particularly relates to a high-toughness high-sensitivity polymer-based temperature-sensitive composite material, and a preparation method and application thereof. The high-toughness polymer-based temperature-sensitive composite material in the invention comprises a polymer matrix and a conductive filler, wherein the conductive filler forms a conductive network in the polymer matrix, and the conductive network is a three-dimensional conductive network composed of a one-dimensional conductive filler anda two-dimensional conductive filler; the conductive filler accounts for 0.1 wt%-5w% of the mass of the high-toughness temperature-sensitive composite material; and a mass ratio of the one-dimensionalconductive filler to the two-dimensional conductive filler in the conductive filler is 1: 1. A flexible strain sensor prepared by using the method disclosed by the invention has high strength, high toughness and high sensitivity; and moreover, an experimental method provided by the invention is simple and special, the effective utilization rate of the monomer can be remarkably increased, industrial production is facilitated, and the application field of the flexible strain sensor is expanded.

Description

technical field [0001] The invention belongs to the technical field of polymer conductive composite materials, and specifically relates to a high-toughness and high-sensitivity polymer-based temperature-sensitive composite material and its preparation method and application. Background technique [0002] Temperature-sensitive sensors are mainly made of metal or metal oxide semiconductors. Although they have high sensitivity to temperature changes, they have poor stability, complex processing, and cannot withstand large strains, and are easily damaged under external impact. [0003] Prior art reports can use polymer-based conductive polymers (CPCs) as temperature-sensitive sensors. High-molecular-based conductive polymers (CPCs) are based on organic polymers, mixed with metal powder, graphite, CB, carbon nanotubes, etc. Conductive particles can improve their thermal performance to a certain extent; CPCs exhibit positive temperature coefficient characteristics (PTC) and negati...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L67/02C08K3/04C08G63/91H01C7/02H01C7/04
CPCC08K3/041C08K3/042C08G63/912H01C7/027H01C7/049C08K2201/001C08L2201/06C08L67/04
Inventor 赵中国艾桃桃张鑫陈立贵
Owner SHAANXI SCI TECH UNIV
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