Conclusion
The untreated fibre surface was covered in extractives which were largely removed by solvent extraction. Lignin was then removed with acid chlorite treatment. XPS was an effective tool for observing these changes on the fibre surface.
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Dawson, R.S.W. Determination of surface changes inPinus radiata fibre on chemical treatment by X-ray photo-electron spectroscopy (XPS). Holz als Roh- und Werkstoff 55, 57–58 (1997). https://doi.org/10.1007/s001070050226
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DOI: https://doi.org/10.1007/s001070050226