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Graphene modified phenolic resin, preparation method thereof and application of graphene modified phenolic resin in preparation of composite material

A graphene modification and phenolic resin technology, applied in the field of phenolic resin modification, can solve the problems of high curing temperature, poor mechanical properties, and high brittleness of phenolic resin, and achieve excellent mechanical properties, reduce curing temperature, and increase activity. Effect

Active Publication Date: 2022-01-04
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention aims at the problems of high brittleness, poor mechanical properties and high curing process temperature of phenolic resin

Method used

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  • Graphene modified phenolic resin, preparation method thereof and application of graphene modified phenolic resin in preparation of composite material

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preparation example Construction

[0022] As described above, in a first aspect the present invention provides a method for preparing a graphite-modified phenolic resin, said method comprising the steps of:

[0023] (1) The graphene is added to butanol and mixed uniform, and a graphene solution is obtained;

[0024] (2) Melting the phenolic resin to give a melted phenol resin;

[0025] (3) Add the melted phenolic resin to the graphene solution and mix well to obtain a composite solution;

[0026] (4) The composite solution is warmed and ultrasonically dispersed to obtain a dispersion;

[0027] (5) Heat the dispersion to complete modification reactions while removing the solvent to obtain a modified phenol resin.

[0028] The present invention is not particularly limited phenolic resin employed, may be a novolak, a phenol may be a body. Preferably, the molecular weight of the phenolic novolak resin is 500 to 8,000 in.

[0029] In some preferred embodiments, the graphene graphene powder, and prepared by a process com...

preparation example 1

[0062] Preparation of graphene

[0063] 1.1 Preparation of oxide oxide

[0064] Take an improved Hummer method prepared oxide oxide: 20 g of natural graphite powder, 10 g of potassium sulfate and 10 g of phosphorus 1 to 80 ° C 2 SO 4 (In 70% by mass), stir evenly, cool over 6 h, washed to neutral, dry. Add the dried product to 0 ° C, 230 ml thick h 2 SO 4 (The concentration is 70% by mass) and mixed uniform, then 60 g of potassium permanganate is added and uniformly mixed. The mixture was raised to 20 ° C, then in an oil bath of 35 ° C for 2 hours, 920 ml of deionized water was added. After standing for 15 minutes, 2.8 L of deionized water (which contains 50 ml of hydrogen-containing hydrogenly, the concentration of 30% by mass), after the mixture color became bright, hot filtration, and then 5 l concentration of 10% by mass The dilute sulfuric acid was washed 3 times, and the oxide oxide was obtained.

[0065] 1.2 Preparation of graphene powder

[0066] 0.5 g of the above-made o...

preparation example 2

[0070] The same manner as the preparation example 1 is carried out, and the alcohol is replaced by the same acetic acid (a boiling point is 118 ° C) using an equal volume of acetic acid (boiling point is 118 ° C).

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Abstract

The invention relates to graphene modified phenolic resin, a preparation method thereof and application of the graphene modified phenolic resin in preparation of a composite material. Specifically, the invention provides a method for preparing graphene modified phenolic resin and modified phenolic resin prepared by the method. The method comprises the following steps: preparing a butanol solution of graphene, adding molten phenolic resin into the butanol solution for melting, conducting heating and dispersing, and then carrying out modification reaction while removing a solvent to obtain the modified phenolic resin. The invention also provides a method for preparing the composite material by utilizing the modified phenolic resin and the composite material prepared by the method. The method comprises the step of preparing the composite material by utilizing the modified phenolic resin through an RTM (Resin Transfer Molding) process. The composite material has the advantages of high toughness, low curing temperature, simple process and the like.

Description

Technical field [0001] The present invention belongs to the technical field-modified phenolic resin, relates to a high toughness, the graphene modified phenolic resin and preparation method and a low curing temperature in the preparation of composite materials. Background technique [0002] Phenol resin due to having heat ablation resistance, low dielectric constant, excellent process advantages and is widely used in aerospace and other sophisticated defense. Advantage of lower prices so that the phenolic resin can also be used in civilian areas of automobile manufacturing, construction, communications and so on. [0003] Novolac phenolic resin is usually divided into phenol and size. Typically, the molar phenol and formaldehyde is 0.8 to obtain a novolac, novolac under acidic conditions of a thermoplastic; molar ratio of phenol to formaldehyde of 1.3, to obtain a phenol under basic conditions body, having a body phenol thermosetting. [0004] Phenol resin containing a large amou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/06C08K3/04C08J5/24
CPCC08K3/042C08J5/24C08J2361/06C08L61/06
Inventor 张春园刘妍袁航张博闻婷婷
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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