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The crimping and aggregation of graphene in the matrix often affect the properties of the composites. Herein, we successfully constructed the fluorinated graphene oxide (FGO) with interlayer support structure to improve the properties of epoxy composites. We employed diamine as a spacer and investigated the effects of three diamines with different structures on the modification of FGO in detail. FGO modified by p-phenylenediamine (PPD-FGO) had maximum interlayer spacing, presenting good stability and antiaggregation properties. Moreover, the addition of PPD-FGO makes epoxy resin composite transform from brittle material to ductile material, and the impact strength was significantly improved at both room temperature and 77 K. Meanwhile, the thermal properties were maintained very well, showing a slight increase. In addition, PPD-FGO/epoxy composite coating displayed good anti-corrosion performance for carbon steel. This work not only provides a new method to improve the properties of epoxy resin but also gives a new direction for the application of FGO.

Excellent properties of epoxy composite by constructing interlayer support structural fluorinated graphene oxide