Differences in surface chemistry of regenerated lignocellulose fibers determined by chemically sensitive scanning probe microscopy
Artikel i vetenskaplig tidskrift, 2020

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.

Ioncell-F

Atomic force microscopy

Lignocellulose

Författare

Claudia Gusenbauer

Universität für Bodenkultur

Tiina Nypelö

Chalmers, Kemi och kemiteknik, Tillämpad kemi

Devon S. Jakob

Lehigh University

Xiaoji G. Xu

Lehigh University

Dmitri V. Vezenov

Lehigh University

Shirin Asaadi

Aalto-Yliopisto

Herbert Sixta

Aalto-Yliopisto

Johannes Konnerth

Universität für Bodenkultur

International Journal of Biological Macromolecules

0141-8130 (ISSN)

Vol. 165 2520-2527

Ämneskategorier

Polymerkemi

Pappers-, massa- och fiberteknik

Annan kemi

DOI

10.1016/j.ijbiomac.2020.10.145

Mer information

Senast uppdaterat

2020-11-25