1. Rapid and Continuous Preparation of Polyacrylonitrile-Based Carbon Fibers with Electron-Beam Irradiation Pretreatment.
- Author
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Yang, Jia, Liu, Yuchen, Liu, Jie, Shen, Zhigang, Liang, Jieying, and Wang, Xiaoxu
- Subjects
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POLYACRYLONITRILES , *CARBON fibers , *ELECTRON beams , *THERMAL stability , *TENSILE strength , *ENERGY consumption - Abstract
Thermal stabilization is a critical, yet time- and energy-consuming process during the preparation of PAN-based carbon fibers. In this work, automobile-grade carbon fibers with a 2.85 GPa tensile strength and a 203 GPa modulus are continuously produced with electron-beam (e-beam) irradiation pretreatment and 24 min thermal stabilization. Thermal and structural analyses reveal that e-beam irradiation can lower the onset temperature of the cyclization reaction and mitigate the heat release. Meanwhile, during the process of stabilization, e-beam irradiation can facilitate the evolution of both the chemical structure and the crystalline structure of polyacrylonitrile (PAN) fibers. Comparing to the industrial production of carbon fiber with a 40 min stabilization time, e-beam irradiated PAN fibers can achieve the same degree of stabilization with a 40% time savings. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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