Preparation process for composite of rare earth modified carbon-fibre / epoxy resin

An epoxy resin and rare earth modification technology, which is applied in the field of composite material preparation, can solve the problems of poor interface bonding force, poor processing performance, and large fiber damage of composite materials, and achieves improved interface bonding force, low cost, and improved mechanical properties. Effect

Inactive Publication Date: 2005-03-23
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods have improved the binding force of the interfacial phase to a certain extent and increased the use value of the composite material, but they have not achieved the desired effect, and there are shortcomings such as unstable effect, easy degradation, large damage to fibers, and poor processability. , resulting in poor interfacial bonding of composite materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The raw materials used include: epoxy resin, E-51 bisphenol A type epoxy resin produced by Shanghai Resin Factory; curing agent is 593 modified aromatic amine curing agent (curing at room temperature); carbon fiber, uncoated polyacrylonitrile base High-strength type, produced by Jilin Carbon Plant; the rare earth modifier is prepared according to the following weight percentages:

[0024] Lanthanum chloride: 2%, ethanol: 93%, ethylenediaminetetraacetic acid (EDTA): 2%, ammonium chloride: 1%, nitric acid: 0.5%, urea: 1.5%.

[0025] The carbon fiber is pretreated first, and ablated in a muffle furnace at 450°C for 1 hour, so that the residual organic matter on the surface is below 1%. Then, the above-mentioned rare earth modifier was used to treat the carbon fiber in the modifier at room temperature for 2 hours, filtered, and dried.

[0026] Add a curing agent with a weight percentage of 20% to the epoxy resin to make an epoxy glue, compound the treated carbon fiber and ...

Embodiment 2

[0029] The raw materials used are: epoxy resin is E-51 epoxy resin (618 resin) produced by Shanghai Resin Factory; carbon fiber: T-300, coated surface treated carbon fiber, produced by Toray Corporation of Japan; curing agent Tianjin Chemical Co., Ltd. The 2-ethyl-4 methylimidazole produced by the reagent factory; the rare earth modifier is prepared according to the following mass percentages:

[0030] Cerium chloride 7%; ethanol 76%; ethylenediaminetetraacetic acid (EDTA) 9%; ammonium chloride 5%; nitric acid 1%; urea 2%.

[0031] Pre-treat the carbon fiber first, and ablate it in a muffle furnace at 550°C for 0.5 hours, so that the residual organic matter on the surface is below 1%. Then, the above-mentioned rare earth modifier was used to treat the carbon fiber in the modifier at room temperature for 3 hours, filtered, and dried.

[0032] Add a curing agent with a weight percentage of 7% to the epoxy resin to prepare an epoxy glue, take the modified carbon fiber and immers...

Embodiment 3

[0035] The materials are the same as in Example 1, except that the ratio of the rare earth modifier is changed: 10% of lanthanum oxide; 82% of ethanol; 5% of ethylenediaminetetraacetic acid (EDTA); 2% of ammonium chloride; 0.5% of nitric acid;

[0036] The carbon fibers are pretreated first, and ablated in a muffle furnace at 600°C for 0.5 hours, so that the residual organic matter on the surface is below 1%. Then, the above-mentioned rare earth modifier was used to treat the carbon fiber in the modifier at room temperature for 4 hours, filtered, and dried.

[0037] The manufacturing process of the composite material is the same as in Example 1, and the bending strength of the composite material is tested to be 54.0 MPa.

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Abstract

The invention is a method for preparing rare-earth modified carbon fiber/epoxy resin composite, firstly preprocessing carbon fiber to eliminate residual organic substance on the surface, modified processing the surface of the carbon fiber by rare-earth modifier at room temperature, then compounding the processed carbon fiber with epoxy resin to make preimpregnated material and controlling the volume percent of glue to the preimpregnated material in 35%-45%, then spreading the preimprengated material according to a certain mode and layer number, heat-press-curing forming, and making the composite, where the rare-earth modifier has the components: rare-earth compound, alcohol, editic acid, ammonium chloride, nitric acid and urea.

Description

technical field [0001] The invention relates to a method for preparing a composite material, in particular to a method for preparing a rare earth modified carbon fiber / epoxy resin composite material. The carbon fiber treated with a rare earth modifier is filled with epoxy resin to prepare a composite material to improve the carbon fiber / epoxy resin composite material. The binding force of the interface of the resin composite material can improve the practical engineering application value of the composite material. Background technique [0002] Carbon fiber has the characteristics of high specific strength, high elastic modulus, high heat resistance, and good chemical stability. It is a commonly used reinforcing fiber for preparing high-performance resin-based composite materials. Carbon fiber reinforced composites have excellent mechanical properties and are light in weight. They are widely used in aviation, aerospace, shipbuilding, automobiles and construction. Especially ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/06C08K3/04C08K9/02C08L63/00
CPCC08J5/248
Inventor 程先华上官倩芡吴炬
Owner SHANGHAI JIAO TONG UNIV
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