Microwave-Accelerated Oxidation Reactions of PAN Fibers by a Quasi Traveling Wave Cavity

Hsein Wen Chao^1*

¹物理系, 國立清華大學, 新竹, Taiwan

* Presenter:Hsein Wen Chao, email:s9822817@m98.nthu.edu.tw

This study proposed a new cavity that can enhance the yield of oxidation fiber with quasi-traveling microwave heating. With this new cavity, the product yield is 10 times more than the previous cavity. For the oxidation process, the conventional procedure requires 120 mins to transfer 1cm PAN into oxidation, but this new cavity will enhance the yield by 13 mins for 1cm PAN. This study divides the heating process into two steps to avoid fiber breakage during the sharp structural transition. In the first step, the power of the 2.45GHz source is 148W to heat the fiber as possible while avoiding breakage, and the heating process is 8 mins. In the second, we experiment with several powers, and the heating times are 5 mins. Finally, the density of the fiber was measured, and then permittivity and loss tangent were determined by HFSS (High-Frequency Structure Simulator). We will compare our fibers with commercial ones by X-Ray Diffraction (XRD), Differential Scanning Calorimetry(DSC), Scanning Electron Microscopy (SEM), and Raman Spectroscopy(RS).

Keywords: microwave, carbon fiber, XRD, SEM