For polyacrylonitrile (PAN) based carbon fiber production, the precursor fiber property, stabilization, and carbonization will significantly affect the resulting carbon fiber’s properties. Nowadays, due to the environmental concerns, the biorenewable materials such as cellulose nanocrystals (CNCs) have been proposed as precursors for carbon fibers. Thus it requires insightful understanding the structure-performance of PAN/CNC composite fibers to make high performance carbon fibers. In our studies, the change of orientation and interfacial stress transfer of CNC in PAN fibers, and the carbon structure development of the resulting carbon fibers were systematically investigated by Raman spectroscopy as well as other techniques. The 1095 cm<sup>-1</sup> Raman band associated with C-O ring stretching of the cellulose backbone could be used to quantify the orientation and interfacial stress transfer of CNC, which helps to understand structure-performance of PAN/CNC precursor fibers. For the stabilized and carbonized PAN/CNC fibers, Raman spectroscopy is a powerful tool to measure the carbon structure including ordered and disordered carbon structure. The structure-performance of the carbonized PAN/CNC fibers will also be discussed.

Application of Raman spectroscopy on the structure-performance of polyacrylonitrile/cellulose nanocrystals precursor and carbon fibers

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.