Hwang Young Woo, Shin Tae Joo, Seo Jae Hong, Kim Min Hyeok, Lee Won Jun, Ruoff Rodney S, Seong Won Kyung, Lee Sun Hwa
Center for Multidimensional Carbon Materials, Institute for Basic Science (IBS), Ulsan, 44919, Republic of Korea.
Department of Fiber System Engineering, Dankook University, Yongin, 16890, Republic of Korea.
Small. 2024 Sep;20(36):e2400301. doi: 10.1002/smll.202400301. Epub 2024 May 7.
In this study, it is analyzed how sample geometry (spheres, nanofibers, or films) influences the graphitization behavior of polyacrylonitrile (PAN) molecules. The chemical bonding and changes in the composition of these three geometries are studied at the oxidation, carbonization, and graphitization stages via scanning electron microscopy (SEM), in situ thermogravimetric-infrared (TGA-IR) analysis, elemental analysis, Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS). The influence of molecular alignment on the graphitization of the three sample geometries is investigated using synchrotron wide-angle X-ray diffraction (WAXD) and transmission electron microscopy (TEM). The effects of molecular alignment at different draw rates during spinning are explored in detail.
在本研究中，分析了样品几何形状（球体、纳米纤维或薄膜）如何影响聚丙烯腈（PAN）分子的石墨化行为。通过扫描电子显微镜（SEM）、原位热重-红外（TGA-IR）分析、元素分析、拉曼光谱和X射线光电子能谱（XPS），研究了这三种几何形状在氧化、碳化和石墨化阶段的化学键合和组成变化。使用同步辐射广角X射线衍射（WAXD）和透射电子显微镜（TEM）研究了分子排列对三种样品几何形状石墨化的影响。详细探讨了纺丝过程中不同拉伸速率下分子排列的影响。
