Differences in surface chemistry of regenerated lignocellulose fibers determined by chemically sensitive scanning probe microscopy

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2020-12-15
Major/Subject
Mcode
Degree programme
Language
en
Pages
Series
International Journal of Biological Macromolecules
Abstract
Tuning the composition of regenerated lignocellulosic fibers in the production process enables targeting of specific material properties. In composite materials, such properties could be manipulated by controlled heterogeneous distribution of chemical components of regenerated fibers. This attribute requires a visualization method to show their inherent chemical characteristics. We compared complementary microscopic techniques to analyze the surface chemistry of four differently tuned regenerated lignocellulosic fibers. Adhesion properties were visualized with chemical force microscopy and showed contrasts towards hydrophilic and hydrophobic atomic force microscopy tips. Fibers containing xylan showed heterogeneous adhesion properties within the fiber structure towards hydrophilic tips. Additionally, peak force infrared microscopy mapped spectroscopic contrasts with nanometer resolution and provided point infrared spectra, which were consistent to classical infrared microscopy data. With this setup, infrared signals with a spatial resolution below 20 nm reveal chemical gradients in specific fiber types.
Description
Keywords
atomic force microscopy, Ioncell-F, lignocellulose
Other note
Citation
Gusenbauer , C , Nypelö , T , Jakob , D S , Xu , X G , Vezenov , D V , Asaadi , S , Sixta , H & Konnerth , J 2020 , ' Differences in surface chemistry of regenerated lignocellulose fibers determined by chemically sensitive scanning probe microscopy ' , International Journal of Biological Macromolecules , vol. 165 , pp. 2520-2527 . https://doi.org/10.1016/j.ijbiomac.2020.10.145