• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Applied Polymer Science >Carbon Fibers Derived from UV-Assisted Stabilization of Wet-Spun Polyacrylonitrile Fibers
【24h】

Carbon Fibers Derived from UV-Assisted Stabilization of Wet-Spun Polyacrylonitrile Fibers

机译：紫外纺丝稳定聚丙烯腈腈纶纤维衍生的碳纤维

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A rapid, dual-stabilization route for the production of carbon fibers from polyacrylonitrile (PAN) precursor fibers is reported. A photoinitiator, 4,4'-bis(diethylamino)benzophenone, was added to PAN solution before the fiber wet-spinning step. After a short UV treatment that induced cyclization and crosslinking at a lower temperature, precursor fibers could be rapidly thermooxidatively stabilized and successfully carbonized. Scanning electron microscopy micrographs show no deterioration of the microstructure or hollow-core formation in the fibers due to UV treatment or presence of photoinitiator. Fast-thermally stabilized pure PAN-based carbon fibers show hollow-core fiber defects due to inadequate thermal stabilization, but such defects were not observed in carbon fibers derived from fast-thermally stabilized fibers that contained photoinitiator and were UV treated. Tensile testing results confirm that fibers containing 1 wt % photoinitiator and UV treated for 5 min display higher tensile modulus than all other sets of thermally stabilized and carbonized fibers. Wide-angle X-ray diffraction results show a higher development of the aromatic structure and molecular orientation in thermally stabilized fibers. No significant increase in interplanar spacing or decrease in crystals size were observed within the UV-stabilized carbon fibers containing photoinitiator, but such fibers retain a higher extent of molecular orientation when compared with control fibers. These results establish for the first time, the positive effect of the external addition of photoinitiator and UV treatment on the properties of the PAN-based fibers, and may be used to reduce the precursor stabilization time for faster carbon fiber production rate.
机译：据报道，从聚丙烯腈（PAN）前体纤维生产碳纤维的快速，双重稳定化途径。在纤维湿纺步骤之前，将光引发剂4,4'-双（二乙氨基）二苯甲酮添加到PAN溶液中。经过短暂的紫外线处理，在较低的温度下诱导了环化和交联，母体纤维可以快速热氧化稳定并成功碳化。扫描电子显微镜显微照片没有显示出由于紫外线处理或光引发剂的存在而使纤维的微观结构或空心形成的恶化。快速热稳定的纯PAN基碳纤维由于热稳定性不足而显示出中空纤维缺陷，但在衍生自包含光引发剂并经过UV处理的快速热稳定纤维的碳纤维中未观察到此类缺陷。拉伸试验结果证实，与所有其他组的热稳定和碳化纤维相比，含有1 wt％光引发剂和经紫外线处理5分钟的纤维显示出更高的拉伸模量。广角X射线衍射结果表明，热稳定纤维中芳族结构和分子取向的发展更高。在含有光引发剂的紫外线稳定的碳纤维中，未观察到晶面间距的显着增加或晶体尺寸的减小，但与对照纤维相比，此类纤维保留了较高的分子取向程度。这些结果首次确定了外部添加光引发剂和紫外线处理对PAN基纤维性能的积极影响，并且可用于减少前体稳定时间以提高碳纤维的生产速度。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号