On the crystallinity of cellulose in wood: the newest findings lend further support to its non-crystalline nature

Umesh P. Agarwal; Richard Reiner; Carlos Baez; Sally Ralph

Treesearch

On the crystallinity of cellulose in wood: the newest findings lend further support to its non-crystalline nature

Informally Refereed

Authors:

Umesh P. Agarwal, Richard Reiner, Carlos Baez, Sally Ralph

Year:

2023

Type:

Paper

Station:

Forest Products Laboratory

Source:

21st ISWFPC conference

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Abstract

The native state of wood-cellulose has proven to be difficult to explore. Contrary to the traditional acceptance of wood-cellulose being crystalline, in 2016, the authors' research reported that the cellulose was not crystalline.^[1] New evidence, presented here, further supports the non-crystalline model. This evidence consisted of 64% H₂SO₄ hydrolysis of tension- and opposite-aspen woods (TW and OW, respectively), anatomical examination of the TW- and OW-woods, presence and absence of the 93 cm^-1 Raman band, respectively, in TW G-Iayer and TW S₂ layer, and Raman spectra of TW-CNCs, wood holopulps, as well as those of mixture-samples of crystalline cellulose and xylan. Overall, these findings support the argument that the native wood-cellulose is non-crystalline.

Keywords

Cell wall, CNCs, G-layer, Raman spectroscopy, XRD

Citation

Agarwal, Umesh P.; Reiner, Richard S.; Baez, Carlos; Ralph, Sally A. 2023. On the crystallinity of cellulose in wood: the newest findings lend further support to its non-crystalline nature. Abstract Oral No. O67. In: 21st International Symposium on Wood, Fiber and Pulping Chemistry. 4-7 July 2023. Venezia, Italy. Venice, Italy: Ca’ Foscari University of Venice, Department of Molecular Sciences and Nanosystems: 234-239.