SiCO-doped Carbon Fibers with Unique Dual Superhydrophilicity/Superoleophilicity and Ductile and Capacitance Properties

摘要

Silicon oxycarbide (SiCO) glass-doped carbon fibers with an average diameter of 163 run were successfully synthesized by electrospinning polymer mixtures of preceramic precursor polyureasilazane (PUS) and carbon precursor polyacrylonitrile (PAN) into fibers then converting to ceramic/carbon hybrid via cross-linking, stabilization, and pyrolysis at temperatures up to 1000 °C The transformation of PUS/PAN polymer precursors to SiCO/carbon structures was confirmed by EDS and FTIR. Both carbon and SiCO/carbon fibers were amorphous and slightly oxidized Doping with SiCO enhanced the thermal stability of carbon fibers and acquired new ductile behavior in the SiCO/carbon libers with significantly improved flexibility and breaking elongation. Furthermore, [he SiCO/carbon libers exhibited dual superhydrophilicity and superoleophilicity with water and decane absorbing capacities of 873 and 608 %. respectively. The cyclic voltammetry also showed that SiCO/carbon composite libers possess better capacitor properties than carbon fibers.