Carbon coating on the surface of carbon fiber was prepared by simple hydrothermal reaction method with glucose as raw material.The carbon coating was analyzed by scanning electron microscopy (SEM),transmission electron microscopy (TEM)and X-ray diffraction (XRD),and the effect of glucose solution concentration and pH value on the microstructure of carbon coating on the surface of carbon fi-ber was studied.The results show that the thickness of carbon coating on carbon fiber surface increases with glucose concentration;Reducing the pH value of glucose solution can improve the microstructure of carbon coating.When pH of glucose solution is less than 2,a smooth,uniform and dense carbon coating can be prepared on the surface of carbon fibers,and the thickness of the carbon coating can be adjusted by the concentration of glucose solution.
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