期刊
ACS APPLIED MATERIALS & INTERFACES
卷 2, 期 12, 页码 3738-3744出版社
AMER CHEMICAL SOC
DOI: 10.1021/am100918x
关键词
silicon oxycarbide; carbon fiber; superhydrophilicity; superhydrophobicity; ductile capacitance
资金
- U.S. National Science Foundation [CMMI 0700272]
- National Textile Center [M10-CD02]
- University of California, Davis
Silicon oxycarbide (SiCO) glass-doped carbon fibers with an average diameter of 163 nm 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 degrees 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 fibers with significantly improved flexibility and breaking elongation. Furthermore, the SiCO/carbon fibers 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 fibers possess better capacitor properties than carbon fibers.
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