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A kind of nylon 6/thermally expanded graphite conductive composite material and preparation method thereof

A technology of conductive composite materials and thermally expanded graphite, applied in the field of polymer composite materials, can solve problems such as limiting the application of CPCs, and achieve the effects of easy to master, good electrical conductivity, and low percolation value.

Active Publication Date: 2018-09-18
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, high filler content often sacrifices the excellent processability and mechanical properties of the material while endowing CPCs with electrical conductivity, which greatly limits the application of CPCs.

Method used

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  • A kind of nylon 6/thermally expanded graphite conductive composite material and preparation method thereof
  • A kind of nylon 6/thermally expanded graphite conductive composite material and preparation method thereof
  • A kind of nylon 6/thermally expanded graphite conductive composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment one: the preparation method of the PA6 / EG conductive composite material with isolation structure comprises the following steps:

[0021] (1) Preparation of PA6 / EG conductive composite particles: Mix the dried EG and PA6 particles at a volume ratio of 0.182:99.818 through high-speed mechanical mixing, and realize the uniform coating of EG on the surface of PA6 under the action of mechanical force to obtain PA6 / EG Conductive composite particles, mixing time 5min.

[0022] (2) Compression molding: pre-press the PA6 / EG conductive composite particles prepared in step (1) at 100°C and 10MPa for 2h; then preheat at 225°C for 15min; then hot-press at 3MPa for 5min; Finally, it was cold-pressed to room temperature to obtain a conductive composite material.

Embodiment 2

[0023] Embodiment two: the preparation method of the PA6 / EG conductive composite material with isolation structure comprises the following steps:

[0024] (1) Preparation of PA6 / EG conductive composite particles: Mix the dried EG and PA6 particles at a volume ratio of 0.318:99.682 through high-speed mechanical mixing, and realize the uniform coating of EG on the surface of PA6 under the action of mechanical force to obtain PA6 / EG Conductive composite particles, mixing time 5min.

[0025] (2) Compression molding: pre-press the PA6 / EG conductive composite particles prepared in step (1) at 100°C and 10MPa for 2h; then preheat at 225°C for 15min; then hot-press at 3MPa for 5min; Finally, it was cold-pressed to room temperature to obtain a conductive composite material.

Embodiment 3

[0026] Embodiment three: the preparation method of the PA6 / EG conductive composite material with isolation structure comprises the following steps:

[0027] (1) Preparation of PA6 / EG conductive composite particles: Mix the dried EG and PA6 particles at a volume ratio of 0.455:99.545 by high-speed mechanical mixing, and realize the uniform coating of EG on the surface of PA6 under the action of mechanical force to obtain PA6 / EG Conductive composite particles, mixing time 5min.

[0028] (2) Compression molding: pre-press the PA6 / EG conductive composite particles prepared in step (1) at 100°C and 10MPa for 2h; then preheat at 225°C for 15min; then hot-press at 3MPa for 5min; Finally, it was cold-pressed to room temperature to obtain a conductive composite material.

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Abstract

The invention relates to the field of polymer composite materials, in particular to a nylon6 / thermal expansion graphite conductive composite material and a preparation method thereof. The composite material is prepared from 98.636099.818vol% of nylon 6(PA6) and o.182-1.364 vol% of thermal expansion graphite (EG). The preparation method comprises the steps that the surface of the nylon 6 is evenly wrapped by the thermal expansion graphite through mechanical mixing, nylon6 / thermal expansion graphite conductive composite particles are obtained, and the composite particles are subjected to compression molding to obtain the conductive composite material. In the composite material, EG forms a continuous conductive network with an isolation structure in a PA6 base body, and the composite material has good conductivity and extremely low percolation value.

Description

technical field [0001] The invention relates to the field of polymer composite materials, in particular to a nylon 6 / thermal expansion graphite conductive composite material and a preparation method thereof. Background technique [0002] Conductive polymer composites (CPCs) are compounded by adding a certain amount of conductive fillers to the polymer matrix. Compared with metal conductive materials or intrinsic conductive polymer materials, they have low cost, controllable conductivity, and easy processing. It has excellent performance and wide application range, so it has broad application prospects in aerospace, energy, electronics, biomedicine and other fields. [0003] Nylon 6 (PA6) is a thermoplastic engineering plastic with excellent performance. It is widely used in industrial production and daily life because of its excellent mechanical properties, wear resistance, oil resistance, solvent resistance, self-lubrication, corrosion resistance and good processing perform...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/02C08K7/00C08K3/04
CPCC08K3/04C08K7/00C08K2201/001C08L77/02
Inventor 刘亚青段宏基侯婷婷杨雅琦赵贵哲
Owner ZHONGBEI UNIV
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