Preparation method of organic amine-TiO2 nanowire/carbon fiber multiscale reinforcement

A carbon fiber and organic amine technology, which is applied in the field of preparation of carbon fiber multi-scale reinforcements, can solve the problem of low interface bonding strength and achieve the effect of expanding the application range

Inactive Publication Date: 2017-10-17
QINGDAO UNIV
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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 interfacial bonding strength of existing carbon fiber c

Method used

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  • Preparation method of organic amine-TiO2 nanowire/carbon fiber multiscale reinforcement
  • Preparation method of organic amine-TiO2 nanowire/carbon fiber multiscale reinforcement
  • Preparation method of organic amine-TiO2 nanowire/carbon fiber multiscale reinforcement

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specific Embodiment approach 1

[0055] Specific implementation mode 1: This implementation mode is an organic amine-TiO 2 A method for preparing a nanowire / carbon fiber multi-scale reinforcement, the preparation method is specifically completed according to the following steps:

[0056] 1. Cleaning:

[0057] ① Put the carbon fiber into a Soxhlet extractor filled with acetone, and use acetone to clean and remove impurities on the surface of the carbon fiber at a temperature of 75°C to 85°C. The cleaning time is 2h to 8h, and the cleaned carbon fiber is taken out. Obtain the carbon fiber after cleaning with acetone;

[0058] ②. Place the carbon fiber cleaned with acetone obtained in step ① into a supercritical device, and soak it in a supercritical acetone-water system with a temperature of 350°C to 370°C and a pressure of 8MPa to 14MPa for 20min to 30min to obtain ring removal Carbon fiber after oxygen coating;

[0059] The volume ratio of acetone and water in the supercritical acetone-water system describ...

specific Embodiment approach 2

[0101] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is: step 3 ① put the thionyl chloride / N,N-dimethylformamide mixture into the dry reaction bottle, and step 2 ⑥ to obtain The dried carbon oxidized fiber is put into a reaction bottle, heated to 70°C-76°C, and then reacted at a constant temperature for 45h-48h at a temperature of 70°C-76°C to obtain acyl chloride carbon fiber containing impurities. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0102] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: in step four (2) put into the stainless steel reaction kettle in the glass test tube that reactant is housed, then stainless steel reaction kettle is sealed, reuse The stainless steel reactor is heated to 230°C-240°C in a salt bath furnace, and then grafted at a pressure of 5MPa-6MPa and a temperature of 230°C-240°C for 5min-10min to obtain carbon fibers grafted with PEI on the surface. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a preparation method of an organic amine-TiO2 nanowire/carbon fiber multiscale reinforcement and relates to a preparation method of a carbon fiber multiscale reinforcement. The invention aims at solving the problem that the conventional carbon fiber composite material is low in interface bonding strength. The method comprises the following steps: firstly, cleaning; secondly, oxidizing; thirdly, carrying out acyl chlorination; fourthly, grafting carbon fibers to PEI (Polyether Imide) in supercritical methanol; fifthly, preparing TiO2 sol; sixthly, preparing the carbon fibers of which the surfaces contain TiO2 thin films; seventhly, grafting to obtain the organic amine-TiO2 nanowire/carbon fiber multiscale reinforcement. Compared with a protofilament, the organic amine-TiO2 nanowire/carbon fiber multiscale reinforcement prepared according to the preparation method disclosed by the invention has the advantage that the interfacial shear strength is improved by 88.6 to 92.1 percent. The preparation method disclosed by the invention is a preparation method of the organic amine-TiO2 nanowire/carbon fiber multiscale reinforcement.

Description

technical field [0001] The invention relates to a method for preparing a carbon fiber multi-scale reinforced body. Background technique [0002] Carbon fiber reinforced composite material is a typical representative of composite materials. Because of its light weight, high specific strength, high modulus and other characteristics, it has gradually developed into the preferred material in aerospace, defense cutting-edge military weapons and high-end civilian product industries, especially It plays an important role in emerging industries such as large aircraft manufacturing and wind power generation. As a reinforcement, carbon fiber has the characteristics of high specific strength, low thermal expansion rate, good dimensional stability, good thermal conductivity, excellent weather resistance and good thermal stability. It is regarded as one of the most advanced and mature materials in this century. one. While it has a series of excellent properties, there are also some una...

Claims

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Application Information

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IPC IPC(8): C08K9/04C08K9/02C08K7/06C08K7/08C08J5/06
CPCC08J5/06C08K7/06C08K7/08C08K9/02C08K9/04C08K9/08C08K2201/011Y02P20/54
Inventor 马丽春宋国君朱莹莹韩萍李晓茹王刚丛龙亮郭世梅
Owner QINGDAO UNIV
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