Characterization of Fibrous Materials with SAXS

The properties of carbon fibers were investigated by small-angle X-ray scattering using the SAXSpoint and SAXSpace laboratory SAXS/WAXS systems.


Carbon fibers are mostly composed of carbon atoms, with a typical diameter of a single fiber in the region of 5 to 10 µm. They consist of three components, namely quasi-amorphous and crystalline regions as well as pores (Paris et al. 2000; Kobets et al., 1997). The demand for carbon fibers has dramatically increased exponentially in the past decades due to their exclusive properties such as high stiffness and tensile strength, low weight as well as high chemical resistance. Their application fields range from aerospace to civil engineering.

For the characterization of technical and biological fibers using small-angle X-ray scattering various methods are known. Shioya et al. (1985) developed a method to analyze the voids in a fibrous material using SAXS profiles of unidirectionally aligned fibrous bundles.

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