What is it about?

Herein, we report the influence of three different nanocellulose types, varying in the derivatization method, source, and aspect ratio, on the mechanical properties and thermal transformations of solution-spun PAN/nanocellulose nanocomposite fibers into carbon fibers. The incorporation of 0.1 wt % nanocellulose into solution-spun PAN fibers led to a 7–19% increase in tensile modulus and 0–27% increase in tensile strength in the solution-spun fibers, compared to a control PAN fiber.

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Why is it important?

The reinforcement of the polyacrylonitrile (PAN) precursor fiber using nanoadditives offers a unique strategy to improve the mechanical performance of carbon fiber.

Perspectives

The improvements varied depending on the nanocellulose type. After low-temperature carbonization at 1200 °C, improvements in the mechanical properties of the nanocellulose-reinforced carbon fibers, compared with a PAN fiber, were also observed. In contrast to the precursor fibers, the improvement % in the carbonized fibers was found to be dependent on the nanocellulose morphology and was linearly correlated with increasing aspect ratio of nanocellulose. For example, in carbon fibers with a cotton-derived low-aspect-ratio cellulose nanocrystal and spinifex-derived high-aspect-ratio CNC and nanofiber, up to 4, 87, and 172% improvements in tensile moduli were observed, respectively.

Dr Pratheep K Annamalai
University of Queensland

Read the Original

This page is a summary of: Influence of Different Nanocellulose Additives on Processing and Performance of PAN-Based Carbon Fibers, ACS Omega, June 2019, American Chemical Society (ACS), DOI: 10.1021/acsomega.9b00266.
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