Repairable carbon fiber cloth reinforced epoxy resin plate and preparation and repairing methods thereof

A carbon fiber cloth and epoxy resin technology, applied in the field of high-resolution materials, can solve the problems that the mechanical properties cannot reach the initial performance of the composite material, affect the appearance of the composite material, and have low mechanical properties, and achieve high rigidity, good dimensional stability of products, The effect of high hardness

Inactive Publication Date: 2017-03-15
JIANGSU AOSHENG COMPOSITE MATERIALS HI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former affects the appearance of the composite material, and the mechanical properties after repair are generally lower than the latter
Although the latter is better than the former in terms of appearance and mechanical properties after repair, since epoxy resin is a thermosetting material, during the repair process, the molecular chain segments of epoxy resin in the damaged material cannot be combined with the molecular chains of epoxy resin for repair. The segments are entangled at the molecular level, resulting in mechanical properties after repair that still cannot reach the original properties of the composite.

Method used

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  • Repairable carbon fiber cloth reinforced epoxy resin plate and preparation and repairing methods thereof
  • Repairable carbon fiber cloth reinforced epoxy resin plate and preparation and repairing methods thereof
  • Repairable carbon fiber cloth reinforced epoxy resin plate and preparation and repairing methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 8-13

[0054] According to the preparation method of Example 7, the pre-curing temperature is 50 ° C, and the time is 48 hours. According to the ratio of Table 3, a repairable carbon fiber cloth reinforced epoxy resin board is prepared, and the tensile strength and repairability are evaluated. The performance is listed in table 3. The repair method is carried out according to the repair method in Example 7.

[0055] Raw material formula (weight part) and performance of table 3 embodiment 8-13

[0056]

Embodiment 14

[0058] Prepare a repairable carbon fiber cloth reinforced epoxy resin board according to the formula and preparation method of Example 7, the pre-curing temperature is 180 ° C, and the pre-curing is 1 hour, but the preparation method step d) is changed to: make the mixed solution II impregnate 2 layers Carbon fiber cloth, and after laminating two layers of carbon fiber, dry to remove solvent. The tensile strength and repairability were evaluated, and the properties are listed in Table 4. The repair method is carried out according to the repair method in Example 7.

Embodiment 15

[0060] According to the formula and preparation method of Example 7, a repairable carbon fiber cloth reinforced epoxy resin board was prepared, and the tensile strength and repairability were evaluated. The properties are listed in Table 4. The fix is:

[0061] a) Preparation of repair solution, 90 parts by weight of 1,6-hexanediol (boiling point 243°C), 10 parts by weight of epoxy resin and curing agent A, the type and content of the epoxy resin and curing agent used are the same Embodiment 7 raw material formula.

[0062] b) Apply the repair solution to the damaged area and heat it to 200°C; (the boiling point of 1,6-hexanediol is about 243°C)

[0063] c) Maintain for a certain period of time until the surface of the resin plate dissolves;

[0064] d) Continue heating to 250°C to volatilize the restoration solution.

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Abstract

The invention provides a repairable carbon fiber cloth reinforced epoxy resin plate and preparation and repairing methods thereof; the repairable carbon fiber cloth reinforced epoxy resin plate is prepared from, by weight, 100 parts of epoxy resin, 5-20 parts of curing agent A, 10-40 parts of curing agent B, 0.1-5 parts of an accelerant, and at least one layer of carbon fiber cloth; the curing agent A is selected from one or more of acid anhydride and carboxylic acid curing agents, the curing agent B is selected from one or more of curing agents other than acid anhydride and carboxylic acid ones, and the accelerant is selected from one or more of calcium salts, zinc salts and iron salts. The repairable carbon fiber cloth reinforced epoxy resin plate of the invention has the advantages of common carbon fiber cloth reinforced epoxy resin plates, such as high rigidity, high hardness, high tolerance to temperatures, low flammability and good article size stability, is repairable, allows damage in use to be repaired easily, and has post-repairing mechanical properties basically identical with initial mechanical properties of the resin plate, and the repairing process is simple and low in cost.

Description

technical field [0001] The invention relates to a carbon fiber cloth epoxy resin composite material, in particular to a repairable carbon fiber cloth reinforced epoxy resin plate and a preparation and repair method thereof, belonging to the field of high-resolution materials. Background technique [0002] Carbon fiber composite material is a very attractive new type of material that is emerging. It can take into account the performance of carbon fiber and matrix to become an engineering structural material with better comprehensive performance and functional material with special properties. It is mainly divided into carbon fiber resin-based composites and metal matrix composites. The metal matrix has high strength, heat resistance, electrical and thermal conductivity, and moisture absorption and aging resistance, but its manufacturing process and internal structure are relatively complicated. The current research is mainly to optimize the design of its manufacturing process...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08K7/00C08K7/06C09D163/00C09D7/12
CPCC08K7/00C08K5/053C08K7/06C09D7/63C09D163/00C08L63/00
Inventor 严兵许文前刘成施刘生张可可
Owner JIANGSU AOSHENG COMPOSITE MATERIALS HI TECH
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