Design of carbon fiber with nano accuracy for enrichment interface

The interface is the pivot of the mechanical properties of Carbon fiber reinforced plastic composites (CFRP). Presently, interface researches are numerous but few involve carbonized interface. Herein, the effect of temperature on the physicochemical properties of the carbonized interface is investigated using PDA as a precursor. The results show that the high temperature causes the amorphous carbon structure in the carbon coating to transform into nanocrystalline graphite structure, and the polarity of the fiber surface is reduced. The increase in surface roughness due to temperature fails to compensate for the negative effect of reduced polarity on the interfacial bonding properties. Both the tensile strength of carbon fiber and ILSS of CFRP decreased with the increase in temperature. This study will have interesting implications for the construction of the model in the carbonized interface. [Display omitted] •Carbon coating uniformly constructed on the fiber surface is achieved using novel strategies.•A novel carbon fiber based on controllable carbon coating is designed.•The interaction mechanism between carbon coating and composite is enriched.