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Preparation method and product of graphene-modified carbon fiber sizing agent

A technology of graphene modification and carbon fiber, which is applied in the direction of carbon fiber, fiber treatment, textiles and papermaking, etc. It can solve the problems of uneven dispersion and poor stability of graphene, and achieve improved anchoring effect, good stability and wear resistance Good results

Active Publication Date: 2016-08-17
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to address the deficiencies in the prior art, to provide a method for preparing a graphene-modified carbon fiber sizing agent and its products. The product prepared by this method not only has a small and uniform particle size, but also has the advantages of being well bonded to the surface of the carbon fiber. , and at the same time solve the problem of uneven dispersion and poor stability of graphene

Method used

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  • Preparation method and product of graphene-modified carbon fiber sizing agent
  • Preparation method and product of graphene-modified carbon fiber sizing agent
  • Preparation method and product of graphene-modified carbon fiber sizing agent

Examples

Experimental program
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Effect test

Embodiment 1

[0040] Preparation of modified graphene solution:

[0041] Graphene oxide aqueous solution (1wt%): 100g;

[0042] Gallic acid: 20g;

[0043] Add a mass fraction of 40% sodium hydroxide solution to the graphene oxide aqueous solution, adjust the pH value to 10, sonicate for 10 minutes in an ultrasonic instrument with a power of 400W and a frequency of 20kHz, and add gallons 20 times the mass of graphene oxide acid, then react at 40°C for 12h, then use a 0.2μm microporous membrane to filter the filtrate, and then use a 0.025μm microporous membrane to filter the previous filtrate, and use distilled water to wash the black modified graphene obtained by filtration. Then the modified graphene obtained by filtration is dissolved in a small amount of distilled water and stored in the form of modified graphene aqueous solution to avoid agglomeration of graphite after drying, that is, to obtain a modified graphene solution of suitable size.

[0044] Prepare carbon fiber sizing:

[00...

Embodiment 2

[0048] Preparation of modified graphene solution:

[0049] Graphene oxide aqueous solution (0.1wt%): 100g;

[0050] Hydrazine hydrate: 10g;

[0051] Add dropwise a calcium hydroxide solution with a mass fraction of 40% in the graphene oxide aqueous solution, adjust the pH value to 9, and perform ultrasonic treatment for 20 minutes in an ultrasonic instrument with a power of 500W and a frequency of 100kHz, and add hydration water with a mass fraction of 100 times the graphene oxide quality. Hydrazine, then react at 20°C for 24h, then use 0.2μm microporous membrane to filter the filtrate, then use 0.025μm microporous membrane to filter the previous filtrate, and use distilled water to wash the black modified graphene obtained by filtration. Then the modified graphene obtained by filtration is dissolved in a small amount of distilled water and stored in the form of modified graphene aqueous solution to avoid agglomeration of graphite after drying, that is, to obtain a modified g...

Embodiment 3

[0056] Preparation of modified graphene solution:

[0057] Graphene oxide aqueous solution (0.1wt%): 100g;

[0058] Rutin: 2g;

[0059] In the graphene oxide aqueous solution, it is 40% ammonia water that the mass fraction is added dropwise, and the pH value is adjusted to 13, and the power is 600W, and the frequency is 120kHz ultrasonic treatment for 20min, adding rutin with 20 times the quality of graphene oxide, and then React at 25°C for 24 hours, then use a 0.2 μm microporous membrane to filter the filtrate, then use a 0.025 μm microporous membrane to filter the previous filtrate, and use distilled water to wash the black modified graphene obtained by filtration to reach neutrality, then The modified graphene obtained by filtration is dissolved in a small amount of distilled water, and stored in the form of a modified graphene aqueous solution, so as to avoid agglomeration of graphite after drying, and obtain a modified graphene solution with a suitable size.

[0060] P...

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Abstract

The invention relates to a preparation method of a graphene-modified carbon fiber sizing agent. The preparation method includes the steps of firstly, mixing solid-state epoxy resin and liquid-state epoxy resin in a fusion manner under 60-100 DEG C to obtain mixed epoxy resin; secondly, adding anionic surfactant, and stirring for emulsifying; thirdly, adding nonionic surfactant, stirring, dripping distilled water, and stirring until the system has phase reversing to obtain a sizing emulsion; fourthly, preparing a modified graphene solution; fifthly, mixing and dispersing the sizing emulsion and the modified graphene solution to obtain the graphene-modified carbon fiber sizing agent. The invention further relates to the graphene-modified carbon fiber sizing agent prepared by the method. The graphene-modified carbon fiber sizing agent prepared by the method is small and even in particle size and can well combine with the surfaces of carbon fibers. By the preparation method, the problems that the graphene is unevenly dispersed and poor in stability are solved.

Description

technical field [0001] The invention relates to the field of preparation of carbon fiber sizing agents, in particular to a method for preparing graphene-modified carbon fiber sizing agents and products thereof. Background technique [0002] Carbon fiber has a series of advantages such as high modulus, high strength, high temperature resistance, fatigue resistance, electrical conductivity and small thermal expansion coefficient. Carbon fiber reinforced resin-based composite materials are widely used in aerospace, transportation, energy, construction and other fields. Carbon fiber filaments are prone to hair and monofilament breakage during the production process, which will reduce the mechanical properties of the material. In order to solve this problem, the surface of carbon fiber is usually sizing during the production process. At the same time, the sizing agent also improves the interfacial bonding strength between carbon fiber and matrix resin, thereby improving the compr...

Claims

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Application Information

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IPC IPC(8): D06M15/55D06M11/74C08L63/00C08K9/04C08K9/02C08K7/06C08J5/06D06M101/40
CPCC08J5/06C08J2363/00C08K7/06C08K9/02C08K9/08D06M11/74D06M15/55D06M2101/40C08L63/00
Inventor 李超颜春祝颖丹刘东徐海兵陈刚王昊
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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