A kind of high-strength and high-toughness polyimide resin-based composite material and preparation method thereof

A high-toughness polyimide resin and polyimide resin technology are applied in the preparation of high-strength and high-toughness polyimide resin-based composite materials, and in the field of high-strength and high-toughness polyimide resin-based composite materials, which can solve the problem of toughness. , processing performance, temperature resistance and excellent mechanical properties cannot be combined, so as to achieve the effect of improving mechanical strength, improving high temperature performance and low water absorption

Active Publication Date: 2018-01-23
BEIJING UNIV OF CHEM TECH
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  • Description
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the defect that polyimide resin material toughness, processability, temperature resistance and excellent mechanical properties cannot be combined in the prior art, and to provide a polyimide resin with high toughness and excellent temperature resistance. Polyimide resin-based composite material with mechanical properties and processability and preparation method thereof

Method used

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  • A kind of high-strength and high-toughness polyimide resin-based composite material and preparation method thereof

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preparation example Construction

[0028] On the one hand, the present invention provides a kind of preparation method of high-strength and high-toughness polyimide resin-based composite material, and the method comprises:

[0029] (1) prepare polyimide resin solution;

[0030] (2) carrying out surface treatment to polyimide fiber;

[0031] (3) disperse the product obtained in step (2) in the polyimide resin solution obtained in step (1) under stirring conditions;

[0032] (4) the mixed slurry that step (3) obtains is carried out heating treatment;

[0033] (5) subjecting the product obtained in step (4) to thermocompression molding;

[0034] The polyimide fibers are at least one of polyimide fiber pulp, polyimide chopped fibers and polyimide fibrids.

[0035] According to the method of the present invention, in step (1), preferably, the solid content of the polyimide resin solution is 5-40% by weight, and the solvent used is ethanol.

[0036] More preferably, the polyimide resin is a polyimide resin contai...

Embodiment 1

[0058] This example is used to illustrate the high-strength and high-toughness polyimide resin-based composite material of the present invention and its preparation method.

[0059] (1) adopt 1500ml 5wt% NaOH solution surface treatment 15g polyimide pulp fiber (average length is 2mm, specific surface area is 7m 2 / g) 5min;

[0060] (2) washing the product obtained in step (1) with water to neutrality;

[0061] (3) At a temperature of 40°C and a stirring speed of 600r / min, the polyimide pulp fibers obtained in step (2) were dispersed in 100g of the prepared polyimide resin solution (solid content 40%, weight average Molecular weight is 2000);

[0062] (4) Raise the mixed slurry obtained in step (3) to 240°C at a heating rate of 5°C / min, and keep it warm for 1h;

[0063] (5) Under the conditions of a temperature of 370° C. and a pressure of 6 MPa, the product obtained in step (4) was subjected to thermocompression molding for 1 hour to obtain a high-strength and high-toughnes...

Embodiment 2

[0065] This example is used to illustrate the high-strength and high-toughness polyimide resin-based composite material of the present invention and its preparation method.

[0066] (1) Under the power of 200W, oxygen plasma is used to treat 5g polyimide pulp fiber (the average length is 1mm, and the specific surface area is 11m 2 / g) carry out surface treatment 5min;

[0067] (2) washing the product obtained in step (1) with water to neutrality;

[0068] (3) At a temperature of 25°C and a stirring speed of 1000r / min, the polyimide pulp fibers obtained in step (2) were dispersed in 100g of the prepared polyimide resin solution (solid content 30%, weight average Molecular weight is 10000);

[0069] (4) Raise the mixed slurry obtained in step (3) to 220°C at a heating rate of 10°C / min, and keep it warm for 1h;

[0070] (5) Under the conditions of a temperature of 320° C. and a pressure of 2 MPa, the product obtained in step (4) was subjected to thermocompression molding for 2...

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Abstract

The invention discloses a high-strength high-toughness polyimide resin matrix composite and a preparation method thereof, and belongs to the technical field of polyimide resin. The preparation method comprises the following steps: (1) preparing a polyimide resin solution; (2) conducting surface treatment on polyimide fibers; (3) under the stirring condition, dispersing the products obtained in step (2) in the polyimide resin solution obtained in step (1); (4) heating the mixed slurry obtained instep (3); and (5) conducting hot-press molding treatment on the product obtained in step (4), wherein the polyimide fibers comprise at least one of a polyimide fiber pulp, a polyimide chopped fiber and a polyimide fibrid. The invention further provides the high-strength high-toughness polyimide resin matrix composite obtained according to the preparation method. The polyimide resin matrix composite obtained according to the preparation method is relatively high in toughness, and has relatively excellent temperature-resistant, mechanical and processing properties.

Description

technical field [0001] The invention relates to the field of polyimide composite materials with high temperature resistance, high strength and high toughness, in particular to a method for preparing a high-strength and high-toughness polyimide resin-based composite material and the high-strength and high-toughness polyimide prepared by the method The invention relates to an amine resin-based composite material, which belongs to the technical field of polyimide resin. Background technique [0002] With its unique aromatic heterocyclic rigid structure, polyimide material has excellent high temperature resistance, mechanical properties, insulation properties, corrosion resistance, radiation resistance and other performance characteristics. The resin, film and fiber produced by using it as raw material , Composite materials, etc. have been widely used in various fields such as electronics, machinery manufacturing, and aerospace. Among them, polyimide resin, as the matrix materi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L79/08C08J5/06D06M11/38D06M10/02C09K3/14F16D69/02B29C43/00D06M101/30
CPCB29C43/003B29K2279/08B29K2879/08C08J5/046C08J5/06C08J2379/08C08J2479/08C08L79/085C08L2201/08C08L2205/02C08L2205/16C09K3/149D06M10/025D06M11/38D06M2101/30F16D69/026F16D2200/006C08L79/08
Inventor 田国峰曾勇要韩恩林齐胜利牛鸿庆武德珍
Owner BEIJING UNIV OF CHEM TECH
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