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Modified graphene/bismaleimide resin composite material and preparation method thereof

A technology of double-horse resin and composite materials, which is applied in the field of modified graphene/double-horse resin composite materials and its preparation, can solve problems such as poor dispersion, poor resin compatibility, and easy agglomeration, and achieve improved interfacial bonding performance and enhanced High solubility and toughness improvement effect

Active Publication Date: 2013-11-27
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, research in this area mainly focuses on improving the electromagnetic properties of composite materials, and there are few studies on mechanical properties.
In addition, like most nanomaterials, graphene has the problems of poor dispersion in resin, easy agglomeration, and poor compatibility with resin, while graphene oxide prepared by graphite oxide method has strong hydrophilicity. , the combination with the resin is not ideal
Therefore, the purpose of improving mechanical properties cannot be achieved only by adding graphene or graphene oxide to the resin.

Method used

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  • Modified graphene/bismaleimide resin composite material and preparation method thereof
  • Modified graphene/bismaleimide resin composite material and preparation method thereof
  • Modified graphene/bismaleimide resin composite material and preparation method thereof

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preparation example Construction

[0030] The present invention proposes a preparation method of a modified graphene / shuangma resin composite material, combined with the attached figure 1 , including the following steps:

[0031] Step 1: Preparation of graphite oxide:

[0032] (1) Take graphite powder, KNO 3 The powder is mixed with concentrated sulfuric acid (concentration: 75wt%~98.3wt%), and the mixing ratio is 1.5~2g KNO per 1.5g graphite powder 3 Powder, 65~69ml concentrated sulfuric acid, add KMnO when the obtained mixture is heated to 35~40℃ in water bath 4 Powder, the addition ratio is 8.0~9.5g KMnO per 1.5g graphite 4 , stir magnetically at 100-300r / min, and react for more than 6 hours; then slowly add deionized water to the mixture for the first time, and adjust the temperature of the water bath to 60°C-70°C, react for 25-40min, and then add Add deionized water for the second time, the amount of deionized water added for the first and second time is still added at the ratio of 100-200ml and 200-40...

Embodiment 1

[0046] Adopt the method provided by the invention to prepare the modified graphene / double horse resin composite material that mass percent composition is 0.1%, concrete steps are as follows:

[0047] The first step, graphite oxide preparation:

[0048] Take graphite powder, KNO 3 The powder is mixed with concentrated sulfuric acid (concentration is 98.3wt%), and the mixing ratio is to add 1.5g KNO to every 1.5g graphite powder 3 powder, 67ml of concentrated sulfuric acid, add KMnO4 powder when the resulting mixture is heated to 40°C in a water bath, and the addition ratio is 9.0g of KMnO for every 1.5g of graphite 4 , magnetically stirred at 220r / min, and reacted for more than 6h; then slowly added 100mL deionized water to the mixture, and adjusted the temperature of the water bath to 60°C, and reacted for 25min, then added 300ml deionized water to it, and continued to react for 4min After that, add 9ml dropwise to the mixed liquid with a concentration of 30wt%H 2 o 2 , un...

Embodiment 2

[0055] Adopting the preparation method provided by the invention to prepare the modified graphene / double horse resin composite material whose mass percentage concentration of modified graphene is 0.2%, the concrete steps are as follows:

[0056] Step 1: Preparation of graphite oxide:

[0057] (1) Take graphite powder, KNO 3 The powder is mixed with concentrated sulfuric acid (concentration: 75wt%), and the mixing ratio is to add 1.5KNO to every 1.5g of graphite powder 3 powder, 65ml of concentrated sulfuric acid, when the resulting mixture was heated to 35°C in a water bath, KMnO was added 4 Powder, the addition ratio is 9.5g KMnO per 1.5g graphite 4 , magnetically stirred at 100r / min, and reacted for more than 6h; then slowly added deionized water to the mixture for the first time, and adjusted the temperature of the water bath to 70°C, and reacted for 40min, then added deionized water to it for the second time , the first and second additions of deionized water are still ...

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Abstract

The invention discloses a modified graphene / bismaleimide resin composite material and a preparation method thereof, and belongs to the technical field of the preparation of nanometer composite materials. The preparation method comprises the following steps: firstly preparing graphite oxide, then preparing modified graphene, and finally preparing a composite material according to 0.1-0.5wt% of modified graphene content in the composite material. The shock strength of the modified graphene / bismaleimide resin composite material disclosed by the invention is 19.557 to 26.171KJ / m<2>, and compared with the toughness of original bismaleimide resin, the toughness of the modified graphene / bismaleimide resin composite material is increased by 3.67% to 38.74%. The interfacial bonding property between the modified graphene and the bismaleimide resin is greatly improved, so that the toughness of the bismaleimide resin is improved, and the exertion of the property of the graphene is facilitated; compared with the toughness of the bismaleimide resin and a reduced graphene / bismaleimide resin composite material, the toughness of the modified graphene / bismaleimide resin composite material is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of preparation of nanocomposite materials, in particular to a modified graphene / shuangma resin composite material and a preparation method thereof. Background technique [0002] Graphene is made of carbon atoms with sp 2 It is composed of monoatomic layers connected by hybridization, and its basic structural unit is the most stable benzene six-membered ring in organic materials. Its theoretical thickness is only 0.35nm, which is the thinnest two-dimensional material discovered so far. The discovered two-dimensional allotrope of carbon. This special structure contains rich and peculiar physical phenomena, which make graphene exhibit many excellent physical and chemical properties. For example, the strength of graphene is the highest among the tested materials, reaching 130GPa, which is more than 100 times that of steel; Flow rate up to 1.5×10 4 cm 2 ·V -1 ·s -1 , which is twice that of the currently kno...

Claims

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Application Information

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IPC IPC(8): C08L79/08C08K9/04C08K9/02C08K3/04
Inventor 肇研段跃新刘慕春王琰苏玉芹
Owner BEIHANG UNIV
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