Sun Xiao, Li Xiaoli, Thippanna Varunkumar, Doyle Conor, Mu Ying, Barrett Thomas, Chambers Lindsay B, Yu Churan, Levendis Yiannis, Song Kenan, Minus Marilyn
Department of Mechanical and Industrial Engineering, Northeastern University, 360 Huntington Avenue, Boston 02115, Massachusetts, United States.
Mechanical Engineering, College of Engineering, University of Georgia, 302 E Campus Rd, Athens 30602, Georgia, United States.
ACS Polym Au. 2025 Apr 9;5(3):270-281. doi: 10.1021/acspolymersau.5c00006. eCollection 2025 Jun 11.
Polyacrylonitrile (PAN) fibers, widely recognized for their exceptional carbonization and graphitization at higher processing temperatures, serve as precursors for high-performance carbon fiber production. This study explores the fabrication of PAN control fibers and PAN-CNT composites via fiber spinning, a process influenced by solution behavior, macromolecular extension, and crystallizations. The polymer chain morphologies, along with pore nucleation and growth, play a critical role in determining fiber microstructure and mechanical properties. Comprehensive characterization like wide-angle X-ray diffraction (WAXD) and differential scanning calorimetry (DSC) was conducted for PAN control and PAN-CNT composite fibers at polymer concentrations of 9, 10, and 11 wt % with specific CNT loading. This study highlights the enhanced performance of PAN fibers and PAN/CNT composite fibers fabricated at polymer concentrations of 9, 10, and 11 wt %. Additionally, the effects of carbon nanotubes (CNTs) on the polymer microstructure and properties, including crystallinity and thermal stability, were analyzed and compared.
聚丙烯腈（PAN）纤维因其在较高加工温度下出色的碳化和石墨化性能而广受认可，是高性能碳纤维生产的前驱体。本研究通过纤维纺丝探索了PAN对照纤维和PAN-CNT复合材料的制造，该过程受溶液行为、大分子伸展和结晶的影响。聚合物链形态以及孔隙成核和生长在决定纤维微观结构和机械性能方面起着关键作用。对聚合物浓度为9%、10%和11%且具有特定CNT负载量的PAN对照纤维和PAN-CNT复合纤维进行了广角X射线衍射（WAXD）和差示扫描量热法（DSC）等综合表征。本研究突出了在聚合物浓度为9%、10%和11%时制造的PAN纤维和PAN/CNT复合纤维的性能增强。此外，分析并比较了碳纳米管（CNT）对聚合物微观结构和性能（包括结晶度和热稳定性）的影响。
