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Modified graphene/bismaleimide resin and preparation method thereof

A technology of maleimide resin and bismaleimide, which is applied in the field of modified graphene/bismaleimide resin and its preparation, can solve the problems of good moldability and high impact resistance, and achieve improved Toughness, good processing performance, and the effect of improving dispersibility

Pending Publication Date: 2022-07-01
LUOYANG INST OF CUTTING EDGE TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The main purpose of the present invention is to provide a kind of modified graphene / bismaleimide resin and preparation method, to solve the problem that existing bismaleimide resin can't satisfy moldability and high impact resistance simultaneously

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  • Modified graphene/bismaleimide resin and preparation method thereof

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preparation example Construction

[0020] As described in the background art, the existing bismaleimide resins cannot satisfy the problems of good formability and high impact resistance at the same time. In order to solve the above technical problems, the present application provides a preparation method of modified graphene / bismaleimide resin, and the preparation method of modified graphene / bismaleimide resin includes: , allyl phenolic organics, thermoplastic resin and bismaleimide monomer are polymerized to obtain modified graphene / bismaleimide resin, wherein bismaleimide monomer, aminated graphite The weight ratio of alkene, allylphenolic organic matter and thermoplastic resin is (50-100):(0.5-7):(35-75):(5-25).

[0021] In the above preparation method, by carrying out amination modification of graphene, the interface effect between bismaleimide resin and graphene can be greatly improved, and the effect of aminated carbon nanotubes in bismaleimide resin is improved simultaneously. dispersion. At the same t...

Embodiment 1

[0041] A preparation method of modified graphene / bismaleimide resin comprises:

[0042] (1) Preparation of graphene oxide

[0043] Under the condition of ice bath, add 360ml of concentrated sulfuric acid, 40ml of nitric acid, and 3g of graphite powder into the flask, slowly add 18g of potassium permanganate with a small spoon, and then raise the temperature to 60°C and react for 12h. Slowly pour the reacted solution into 400 ml of ice water, stir vigorously for 15 min, and then add hydrogen peroxide until the color of the solution becomes bright yellow. The obtained solution was centrifuged, washed three times with ethanol, hydrochloric acid, and distilled water, and the obtained brown solid was freeze-dried to obtain graphene oxide.

[0044] (2) Preparation of Aminated Graphene

[0045] Disperse the graphene oxide in step 1 in water with a concentration of 2 mg / ml to obtain a graphene oxide suspension. According to the ratio of 200 mg of graphene oxide solution and 1 ml of...

Embodiment 2

[0049] A preparation method of modified graphene / bismaleimide resin comprises:

[0050] The difference with embodiment 1 is: the preparation of modified graphene / bismaleimide resin is as follows:

[0051] Add 75g of diallyl bisphenol A to the modified graphene tetrahydrofuran solution (containing 1970mg of modified graphene), ultrasonicate for 1-2h under the ultrasonic breaker, and then add 20g of thermoplastic resin (polyether sulfone), after the thermoplastic resin is completely mixed, lower the temperature to 120°C, add 100g of N,N'-4,4'diphenylmethane bismaleimide under magnetic stirring, and continue to stir magnetically after the solution is clarified , and stirred at 120 °C for 0.5 h. Pour the mixed liquid into the prepared mold, and extract air bubbles in a vacuum oven at 150°C for 15-30 minutes. Then, it is cured according to the curing method of 150℃ for 1h, 180℃ for 1h, and 200℃ for 3h, cooled to room temperature, taken out and demolded to obtain a modified graphe...

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Abstract

The invention provides a modified graphene / bismaleimide resin and a preparation method thereof. The preparation method of the modified graphene / bismaleimide resin comprises the following steps: carrying out polymerization reaction on aminated graphene, an allyl phenol organic matter, thermoplastic resin and a bismaleimide monomer to obtain the modified graphene / bismaleimide resin, wherein the weight ratio of the bismaleimide monomer to the aminated graphene to the allyl phenol organic matter to the thermoplastic resin is (50-100): (0.5-7): (35-75): (5-25). According to the preparation method of the modified graphene / bismaleimide resin prepared by the preparation method, the modified graphene / bismaleimide resin not only has relatively good processing performance, but also has excellent impact resistance.

Description

technical field [0001] The invention relates to the field of organic resin synthesis, in particular to a modified graphene / bismaleimide resin and a preparation method. Background technique [0002] Bismaleimide has high strength and modulus, excellent high temperature resistance, damp heat resistance, radiation resistance, damp heat resistance, low moisture absorption and low thermal expansion coefficient, etc. It has been widely used in aerospace, transportation, and electronics fields. Applications. However, after curing, the bismaleimide resin has high cross-linking density and high molecular chain rigidity, which is manifested as poor impact resistance, low elongation at break and low fracture toughness, which seriously limits the bismaleimide resin. development and application. Therefore, improving the molding processability of bismaleimide resin and improving the toughness of the cured product has become the main research focus of bismaleimide resin. [0003] Graphe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/08C08L81/06C08K9/04C08K3/04
CPCC08L79/085C08L81/06C08K9/04C08K3/042
Inventor 刘若鹏赵治亚杨鸿帆李世超
Owner LUOYANG INST OF CUTTING EDGE TECH
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