Preparation method of multicomponent-modified carbon-fiber-reinforced epoxy resin composite material

An epoxy resin and fiber-reinforced technology, applied in fibrous fillers, dyed organic silicon compound treatment, etc., can solve the problems of lack of controllable and effective surface activation methods, low shear strength, etc.

Inactive Publication Date: 2015-01-14
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of low interlaminar shear strength of carbon fiber reinforced non-polar resin composite materials due to the lack of controllable and effective surface activation methods for the existing carbon fiber reinforced composite material interface, thereby providing an interfacial adhesive Preparation method of strong multi-component modified carbon fiber reinforced epoxy resin composite material

Method used

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  • Preparation method of multicomponent-modified carbon-fiber-reinforced epoxy resin composite material
  • Preparation method of multicomponent-modified carbon-fiber-reinforced epoxy resin composite material
  • Preparation method of multicomponent-modified carbon-fiber-reinforced epoxy resin composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A method for preparing a multi-component modified carbon fiber reinforced epoxy resin composite material, comprising the following steps:

[0035] (1): Weigh 4g of dry CNTs into a round-bottomed flask, add 100ml of concentrated sulfuric acid and concentrated nitric acid with a volume ratio of 3:1, stir and react in a constant temperature water bath at 60°C for 4h, and the solution after reaction Add distilled water to dilute, filter with porous membrane until the washing solution is neutral, and dry under vacuum at 100°C to obtain oxidized CNTs;

[0036] (2): Add 100ml SOCl to 2g of the oxidized CNTs prepared in step (1) 2 and 5ml of N,N-dimethylformamide (DMF) solution, heated to 76°C for 72h, and then distilled off excess SOCl under reduced pressure 2 , add 100ml of ethylenediamine, heat to 80°C to react for 48h, dilute with distilled water, filter with suction until the filtrate is neutral to obtain aminated CNTs, vacuum dry at 100°C for later use;

[0037] (3): Pu...

Embodiment 2

[0048] Example 2: The difference between this example and Example 1 is that 100ml of 1,2-propylenediamine is added in step (2) to aminate the CNTs, and other steps and parameters are the same as in Example 1.

Embodiment 3

[0049] Embodiment 3: The difference between this embodiment and embodiment 1 is that 100 ml of concentrated sulfuric acid is added in step (3) to oxidize CF, and other steps and parameters are the same as in embodiment 1.

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Abstract

The invention relates to a preparation method of a multicomponent-modified carbon-fiber-reinforced epoxy resin composite material, which comprises the following steps: oxidizing carbon nanotubes (CNTs) with strong acid; carrying out acyl-chlorination and amination on the oxidized CNTs sequentially with thionyl chloride and diamine to introduce amino functional group; oxidizing carbon fiber with strong oxidizing acid, and carrying out acyl-chlorination treatment with thionyl chloride to introduce acyl chloro group; mixing the prepared modifying CNTs and modifying carbon fiber to perform graft reaction, thereby obtaining the CNTs-grafted carbon fiber; mixing the CNTs-grafted carbon fiber with polyhedral oligomeric silsesquioxane (POSS) to perform graft reaction, thereby obtaining the binary POSS-grafted carbon fiber; and sufficiently infiltrating the binary POSS-grafted carbon fiber in the base resin, and carrying out hot pressing to perform curing formation. The CNTs and POSS cografted on the carbon fiber surface can improve the surface topography of the carbon fiber, increase the contact area with the resin base and penetrate into the resin base under the anchoring action, so that the interfacial mechanical mesh action is higher.

Description

technical field [0001] The invention relates to a preparation method of a modified carbon fiber reinforced epoxy resin composite material, belonging to the technical field of carbon fiber composite materials. Background technique [0002] Carbon fiber (CF) is a fibrous carbon material with high carbon content obtained by carbonizing organic fibers at high temperatures in an inert gas. It has the intrinsic characteristics of carbon materials and the softness and processability of textile fibers. It is a new A generation of reinforcing fibers. Carbon fiber has excellent properties such as high strength, high modulus, high temperature resistance, low density, friction resistance, corrosion resistance, and electrical and thermal conductivity. In the case of the same volume, its weight is less than 1 / 4 of steel. The tensile strength of carbon fiber resin composite materials is generally above 3500Mpa, which is 7-9 times that of steel, and the tensile elastic modulus is 230-430G...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08K9/06C08K7/06C08K3/04C08K7/24C08J5/06C09C1/44C09C3/12
Inventor 张如良赵丽华崔洪芝张军帅刘赟李辉平
Owner SHANDONG UNIV OF SCI & TECH
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