Graphene based epoxy resin composite material and preparation method thereof
A technology of alkenyl epoxy resin and composite materials, which is applied in the field of composite materials, can solve the problems that graphene is prone to agglomeration, affects the mechanical properties and high temperature resistance of composite materials, and the uneven dispersion of graphene, so as to achieve good mechanical properties and The effect of high temperature resistance
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[0028] The present invention also provides a preparation method of the graphene-based epoxy resin composite material described in the above-mentioned technical scheme, comprising the following steps:
[0029] (1) modify graphene oxide, coupling agent, dispersant and surfactant in a solvent to obtain modified graphene oxide;
[0030] (2) The modified graphene oxide and epoxy resin obtained in the step (1) are mixed and then heated, and then a curing agent is added for curing to obtain a graphene-based epoxy resin composite material.
[0031] In the invention, the graphene oxide, coupling agent, dispersant and surfactant are mixed in a solvent and then modified to obtain the modified graphene oxide. In the present invention, the modification temperature is preferably 50-80°C, more preferably 55-75°C, more preferably 60-70°C, most preferably 65°C; the time is preferably 5-7h, more preferably 5.5~6.5h, more preferably 6h. The present invention uses a coupling agent to modify gra...
Embodiment 1
[0035] Mix 0.01g graphene oxide, 0.01g silane coupling agent, 0.01g polyethylene glycol 400, 0.01g sodium alkylbenzene sulfonate and 100g N,N'-dimethylacetamide, at 50℃ Heat for 7 hours to obtain modified graphene oxide; then continue to add 100g of bisphenol A epoxy resin to the reaction system, and heat at 80°C for 10h; then continue to add 1g of diethylenetriamine to the reaction system, and continue to heat at 80°C for 6h , to obtain graphene-based epoxy resin composites.
Embodiment 2
[0037] 0.02g of graphene oxide, 0.015g of titanate coupling agent, 0.01g of a mixture of polyethylene glycol 400 and polyethylene glycol 2000, 0.01g of sodium polyacrylate and 100g of N,N'-dimethylformamide were fully After stirring and mixing, heat at 60°C for 5h to obtain modified graphene oxide; then continue to add 100g of epoxy acrylic resin to the reaction system, and heat at 80°C for 10h; then continue to add 1g of ethylenediamine to the reaction system, Continue to heat at ℃ for 5h to obtain a graphene-based epoxy resin composite material.
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