High-resolution imaging of the nanostructured surface of polyacrylonitrile-based fibers
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In our study, we present atomic force microscopy (AFM) investigations of the surface of Polyacrylonitrile-based carbon fibers utilizing two different AFM probes, a standard tip as used in literature up to now and a recently made available super sharp tip. Using the super sharp tip, we identified so far not reported pore-like nanostructures distributed homogeneously over the surface of the fibers. We show that such nanopores are already present on the surface of the corresponding precursor fiber, indicating that these structures are characteristic for the fiber along the production process. To investigate a possible correlation between the surface structures and the mechanical properties of carbon fibers, we further analyzed the surface of various carbon fibers showing different tensile strengths. All investigated fibers show characteristic nanoporous surface structures and a correlation was found between the Nanopore size and shape and the mechanical properties. The effective nanopore area and the aspect ratio of the nanopores decrease with increasing tensile strength of the fibers. In addition, the nanoroughness of the fiber surface is correlated to the nanopore size and also decreases with increasing tensile strength.
KeywordsAtomic Force Microscopy Carbon Fiber Atomic Force Microscopy Probe Precursor Fiber Pore Length
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Conflicts of interest
The authors declare that they have no conflict of interest.
- 5.Mark HF (2007) Encyclopedia of polymer science and technology, 3rd edn. Wiley-Interscience, HobokenGoogle Scholar
- 19.Wilms C, Seide GH, Gries T (2013) The relationship between process technology, structure development and fibre properties in modern carbon fibre production. Chem Eng Trans 32:1609–1614Google Scholar
- 39.Zhong Q, Inniss D, Kjoller K, Elings VB (1993) Fractured polymer/silica fiber surface studied by tapping mode atomic force microscopy. Surf Sci Lett 290(1–2):L688–L692Google Scholar
- 45.Toray (T300) Product literatureGoogle Scholar
- 46.Toray (T700) Product literatureGoogle Scholar
- 47.Toray (M40) Product literatureGoogle Scholar
- 52.Khulbe KC, Feng CY, Matsuura T (2008) Synthetic polymeric membranes. Springer, BerlinGoogle Scholar
- 55.Souhaimi MK, Matsuura T (2011) Membrane distillation: principles and applications, 1st edn. Elsevier professional, BostonGoogle Scholar