Evolution of microstructure and properties of phenolic fibers during carbonization

作者: Chun-Ling Liu , Wen-Sheng Dong , Jing-Ren Song , Lang Liu

DOI: 10.1016/J.MSEA.2007.02.067

关键词: MicrostructureAnalytical chemistryThermogravimetric analysisMaterials scienceRaman spectroscopyScanning electron microscopeUltimate tensile strengthInfrared spectroscopyFourier transform infrared spectroscopyGraphite

摘要: The microstructure evolution of phenolic fibers carbonized at different temperatures and the influence resulting on mechanical electrical behaviors were investigated using a combination techniques including thermogravimetric analysis-mass spectroscopy (TG-MS), Fourier transform infrared (FT-IR), laser Raman spectroscopy, powder X-ray diffraction (XRD), scanning electron microscopy (SEM), N2 physical adsorption, tensile strength conductivity measurements. results showed that below 500 ◦ C aromatic union was crosslinked by aliphatic bridges; above with increasing temperature polymer network destroyed, hexagonal carbon layers gradually formed; 850 content further increased due to transformation amorphous carbons in fibers; 1500 slow toward ideal graphite occurred. accessible micropores (<1.2 nm, 200–1040 m 2 /g) could be detected range 600–950 C. exhibited maximum value 640 MPa 550 electric reached 2.45 × 10 4 S/m 2800

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