Study on Synergistic Reinforcement of Epoxy Resin with Graphene Oxide/Cellulose Nanocrystals
Nano filler GC was prepared by modifying graphene oxide(GO)with cellulose nanocrystals(CNC),and epoxy resin(EP)/GC composites were prepared.The effects of GC on the mechanical properties,dynamic mechanical properties,and dielectric properties of EP nanocomposites were studied.The results show that compared with single nano filler GO or CNC,the composite filler GC can improve the mechanical properties and viscoelasticity of EP composites more effectively.EP/GC has the most significant dielectric constant improvement effect,and the dielectric loss is relatively lower,close to the level of pure EP.With the addition of GC,the resistivity of EP/GC decreases from 8.23×1010 Ω·cm of pure EP to 7.66×108 Ω·cm.In the direct current field of 0～50 kV,compared with pure EP,the breakdown voltage of EP/GC is increased from 29.45 kV to 36.57 kV,with an increase of 24.2%.
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