Graphene-reinforced resin-based full-carbon composite material and preparation method thereof

Abstract

The invention discloses a graphene-reinforced resin-based full-carbon composite material and a preparation method thereof. The preparation method comprises the following steps: soaking a carbon nanotube film in an aqueous hydrogen peroxide solution, then soaking in an aqueous hydrochloric acid solution, washing, and performing Mechanical unidirectional stretching, immersed in the first liquid, rinsed with dichloromethane, left in vacuum to obtain the treated film, immersed in the second liquid, and then pulled by the pulling method to obtain a layered film The structure is then pressed under mechanical pressure along the thickness direction of the layered structure. During pressing, the temperature is raised from room temperature to 180-200 ° C, and then the temperature is raised from room temperature to 1000-1100 ° C under an inert gas or nitrogen environment and maintained at this temperature for 30 minutes. Cool to room temperature to obtain a graphene-reinforced resin-based full-carbon composite material. The present invention slowly solidifies by designing a layered structure, pretreatment of the layer joint surface, and the application of graphene fillers, and utilizes the tight combination of the soft phase and the hard phase. The texture of the composite material is dense and high thermal conductivity is achieved.

Description

technical field [0001] The invention belongs to the technical field of carbon-carbon composite film material preparation, and in particular relates to a graphene-reinforced resin-based full-carbon composite material and a preparation method thereof. Background technique [0002] The requirements for payload and functionality of new spacecraft continue to increase, manifested in the miniaturization, densification and high power of the electronic equipment carried, and the difficulty of thermal control design is becoming more and more difficult; electronic components are moving toward miniaturization, high power, high With the development of integration, the heat flux density increases rapidly during operation, and the problem of heat dissipation becomes more and more prominent. For the above problems, the research focus is on the development of high thermal conductivity materials ([1] Chen H, Ginzburg V V, Yang J, et al. Thermal conductivity of polymer-based composites: funda...

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Problems solved by technology

Resin-based composite materials have the characteristics of light weight, high specific strength, high specific modulus, and strong designability. However, due to the low thermal conductivity of the matrix resin, the thermal conductivity of the material, especially the thermal conductivity in the vertical fiber direction, is poor; Resins can effectively improve thermal conductivity, but resin-based composites prepared by traditional methods cannot obtain ideal thermal conductivity due to the lack of bonding between the filler and the matrix. The epoxy matrix has a thermal conductivity of 1.53W / (m K) (S.H.Song, K.H.Park, B.H.Kim, Y.W.Choi, G.H.Jun, D.J.Lee, B.S.Kong, K.W.Paik, S.Jeon, Enhanced thermal conductivity of epoxy -graphene composites by using non-oxidized graphene flakes with non-covalent functionalization, Adv. Mater 25(2013) 732e737, http: / / dx.doi.org / 10.1002 / adma.201202736.)

In addition, as the content of nanofillers increases, the aggregation of fillers also hinders the improvement of thermal conductivity (Peng, J.S.; Huang, C.J.; Cao, C.; Saiz, E.; Du, Yi.; Dou, S.X.; Tomsia, A.P.; Wagner, H.D.; Jiang, L.; Cheng, Q.F. Inverse nacre-like epoxy-graphene layered nanocomposites with integration of high toughness and self-monitoring. Matter. 2020, 2, 220-232.)

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