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Preparation method of polyimide/graphene composite material and product of material

A graphene composite and polyimide technology, which is applied in the field of preparation of conductive composite materials, can solve problems such as affecting transfer efficiency, poor polymer compatibility, and non-compliance with green chemistry.

Active Publication Date: 2014-12-10
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In patents EP2554568A2, US20120328785A1, CN102532896A, CN102268134A, CN103275488A, CN102560453A, CN102911360, CN102534858, graphene-modified polyimide composite materials have been reported. Olefin-modified polyimide composite materials, the preparation method is cumbersome, the preparation and use of a large amount of organic solution does not meet the requirements of green chemistry, the environmental pollution is large, and the electrical conductivity of the final composite material is not ideal, the main reason can be It comes down to two aspects: on the one hand, graphene itself is very easy to agglomerate, which leads to its uneven dispersion in the matrix; on the other hand, the interface between graphene and polymer matrix is ​​weak, and the compatibility with polymer is poor. It is easy to form stress concentration points and affect the transfer efficiency, and cannot effectively improve the performance of the polymer, so it is necessary to adopt other methods or technologies for the modification of graphene / polyimide composites

Method used

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  • Preparation method of polyimide/graphene composite material and product of material
  • Preparation method of polyimide/graphene composite material and product of material
  • Preparation method of polyimide/graphene composite material and product of material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Preparation of polyimide / graphene composite particles: dry Ultem1000P particles in a blast oven at 150°C for 4 hours, place 29.85g Ultem1000P particles and 0.15g graphene (0.5% graphene) in a high-speed mixer Stir to obtain polyimide / graphene composite particles; wherein the graphene is added into the high-speed mixer twice, each time stirring at a speed of 20000r / min for 30s at a high speed.

[0030] (2) High-temperature hot-press molding: preheat the polyimide / graphene composite particles prepared in step (1) at 240°C and 3MPa for 15min; then hot-press at 280°C and 10MPa for 30min; Cool naturally to 180°C for demoulding to prepare the target product. The performance test results of the obtained composite materials are shown in Table 1.

Embodiment 2

[0034] Others are the same as in Example 1, the added Ultem1000P particles are 29.7g, the graphene content is 0.3g (1% graphene), and the number of high-speed stirring is 3 times. The performance test results of the obtained composite materials are shown in Table 1.

Embodiment 3

[0044] Others are the same as in Example 1, the added Ultem1000P particles are 29.55g, the graphene content is 0.45g (1.5% graphene), and the number of high-speed stirring is 6 times. The performance test results of the obtained composite materials are shown in Table 1.

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Abstract

The invention discloses a preparation method of a polyimide / graphene composite material. The preparation method comprises the following steps: firstly, mixing polyimide with graphite and stirring at a high speed to obtain polyimide / graphene composite particles; and then carrying out hot press molding on polyimide / graphene composite particles to prepare the composite material. According to the preparation method of the polyimide / graphene composite material disclosed by the invention, under the condition that any reagent is not added, the modification of grapheme on polyimide is achieved so as to obtain the composite material with excellent electrical conductivity and the preparation method is simple and environmentally friendly and is suitable for industrial production.

Description

technical field [0001] The invention relates to the field of preparation of conductive composite materials, in particular to a preparation method of polyimide / graphene composite materials and products thereof. Background technique [0002] Polymer conductive material is a kind of conductive function (including semiconductivity, metal conductivity and superconductivity), with conductivity of 10 -6 Polymer materials above S / m. According to the classification of electrical properties, it can be divided into: insulator, antistatic body, conductor, and high conductor. Generally expressed by volume resistivity, volume resistivity is 10 10 Anything above Ω·cm is called an insulator; the resistance value is 10 4 ~10 9 Those in the range of Ω·cm are called semiconductors or antistatic bodies; the resistance value is 10 4 Those below Ω·cm are called conductors; those with resistance values ​​below 100Ω·cm or even lower are called high conductors. [0003] Polyimide (PI) refers t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/08C08K3/04
CPCC08K3/04C08K2201/001C08K2201/003C08K2201/006C08L2201/04C08L79/08
Inventor 龙昱刘江涛陈国飞方省众徐禄波周旭峰刘兆平
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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