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Preparation method of carbon fiber reinforcement grafted by graphene oxide

A technology for acidifying carbon fiber and graphene, which is applied in the fields of carbon fiber, fiber processing, textiles and paper making, etc., can solve the problems of toxic process, harsh process conditions, difficult industrialized production, etc., to improve surface energy and wettability, and low cost. Effect

Active Publication Date: 2012-04-11
HARBIN INST OF TECH
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems that the existing carbon fiber surface modification method has harsh process conditions, long process time, toxic process and difficult industrial production. The present invention provides a preparation method of graphene oxide grafted carbon fiber reinforcement

Method used

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  • Preparation method of carbon fiber reinforcement grafted by graphene oxide
  • Preparation method of carbon fiber reinforcement grafted by graphene oxide

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specific Embodiment approach 1

[0012] Specific Embodiment 1: This embodiment is a preparation method of graphene oxide grafted carbon fiber reinforcement, which is achieved through the following steps: 1. Carbon fiber is subjected to acidification treatment to obtain acidified carbon fiber; 2. The acidified carbon fiber and mass percentage concentration Mix 1% polyamide-amine (PAMAM) methanol solution to obtain a mixed solution, then raise the temperature of the mixed solution to 20°C-50°C, and then react at a constant temperature for 4-12 hours, then take out the acidified carbon fiber and wash it with methanol for 2-5 wash with water for 2-5 times, and then vacuum-dry at 40-60°C to constant weight to obtain polyamide-amine-modified carbon fibers, wherein the mass ratio of acidified carbon fibers to polyamide-amine is 0.1-4:1; three 1. Add graphene oxide into the acetone solution, and ultrasonically treat it for 20-60 minutes to obtain a graphene oxide acetone suspension with a graphene oxide concentration ...

specific Embodiment approach 2

[0016] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the carbon fiber is acidified by the following method in the step one: the ratio of carbon fiber and concentrated nitric acid is 1g: 350ml, the carbon fiber is added in the concentrated nitric acid, and then at 70 After reacting for 1 to 3 hours at a constant temperature of ℃ to 90 ℃, take out the carbon fiber, wash it until the pH of the washing liquid is about 7, and then dry it at 80 ℃ and -0.1MPa for 2 to 6 hours to obtain acidified carbon fiber. Other steps and parameters are the same as those in Embodiment 1.

[0017] In this embodiment, before the carbon fiber is acidified, the carbon fiber is subjected to conventional desizing treatment. The specific desizing treatment can be carried out as follows: put the carbon fiber into an analytically pure acetone solution, reflux at a constant temperature for 24-48 hours at 70-80°C, and perform desizing treatment.

specific Embodiment approach 3

[0018] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in step 2, the temperature of the mixed solution is raised to 25° C. to 40° C., and then reacted at constant temperature for 6 to 10 hours. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

A preparation method of a carbon fiber reinforcement grafted by graphene oxide relates to a preparation method of a carbon fiber reinforcement grafted by graphene oxide. The invention solves the problems of harsh process conditions, long process period, toxic process, and difficult industrial production for current carbon fiber surface modification methods. The invention adopts a 'grafting' method, and grafts graphene oxide on acidified carbon fiber surfaces through an acylation reaction by using polyamide-amine with a lot of amido active groups; the invention has low cost, is simple, practical, environment-friendly, and nontoxic, and can be completed within a short period. The method particularly comprises the following steps: mixing acidified carbon fibers and a polyamide-amine methanolsolution, reacting to prepare carbon fibers modified by polyamide-amine, adding the prepared carbon fibers in a graphene oxide acetone suspension, mixing, reacting, filtering, drying the precipitatestill the weight is constant. The obtained carbon fiber reinforcement has interfacial shear strength with epoxy resin of up to 79.77-105.50 MPa which is improved.

Description

technical field [0001] The invention relates to a preparation method of a graphene oxide grafted carbon fiber reinforced body. Background technique [0002] Carbon fiber (CF) is an important reinforcement material developed after the 1950s. The mechanical properties of its composites are closely related to the interfacial bond strength between carbon fiber and matrix. Good interfacial bonding can effectively transfer loads, thereby improving the mechanical properties of materials. However, the surface of untreated carbon fiber is inert and the interface with the resin matrix is ​​weak, which affects the full play of the excellent performance of carbon fiber composite materials. Therefore, it is usually necessary to carry out surface treatment on carbon fiber to improve the interfacial bonding quality of its composite material, thereby improving the interfacial mechanical properties of the material. Commonly used carbon fiber surface modification methods mainly include che...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/74C08L63/00C08K9/02C08K7/06C08K3/04D06M101/40
Inventor 宋英孙秋王福平刘秀影
Owner HARBIN INST OF TECH
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