Preserving Cellulose Structure: Delignified Wood Fibers for Paper Structures of High Strength and Transparency

Biomacromolecules
Xuan YangLars A Berglund

Abstract

To expand the use of renewable materials, paper products with superior mechanical and optical properties are needed. Although beating, bleaching, and additives are known to improve industrially produced Kraft pulp papers, properties are limited by the quality of the fibers. While the use of nanocellulose has been shown to significantly increase paper properties, the current cost associated with their production has limited their industrial relevance. Here, using a simple mild peracetic acid (PAA) delignification process on spruce, we produce hemicellulose-rich holocellulose fibers (28.8 wt %) with high intrinsic strength (1200 MPa for fibers with microfibrillar angle smaller than 10°). We show that PAA treatment causes less cellulose/hemicellulose degradation and better preserves cellulose nanostructure in comparison to conventional Kraft pulping. High-density holocellulose papers with superior mechanical properties (Young's modulus of 18 GPa and ultimate strength of 195 MPa) are manufactured using a water-based hot-pressing process, without the use of beating or additives. We propose that the preserved hemicelluloses act as "glue" in the interfiber region, improving both mechanical and optical properties of papers. Holocellulo...Continue Reading

References

Jul 17, 2007·Biomacromolecules·Tsuguyuki SaitoAkira Isogai
May 24, 2008·Biomacromolecules·Marielle HenrikssonTakashi Nishino
Oct 25, 2008·Environmental Research·Charles James Moore
Jun 17, 2009·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Richard C ThompsonShanna H Swan
Sep 6, 2011·Biomacromolecules·Houssine SehaquiLars A Berglund
Jul 8, 2015·Biomacromolecules·Sylvain GallandLars A Berglund
Jun 17, 2016·Biomacromolecules·Oleksandr NechyporchukFrédéric Pignon
Aug 5, 2017·Science Advances·Roland GeyerKara Lavender Law

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Citations

Aug 15, 2020·Advanced Materials·Upamanyu RayTeng Li
Aug 17, 2020·Advanced Materials·Tobias KeplingerIngo Burgert
Feb 15, 2019·ACS Applied Materials & Interfaces·Xuan YangLars A Berglund
Aug 29, 2019·ACS Omega·Philippe GrönquistIngo Burgert

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