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Synchrotron X-ray measurements of cellulose in wood cell wall layers of Pinus densiflora in the transmission and reflectance modes. Part 2: results with axial loading

  • Chang-Goo Lee , Mariko Yamasaki EMAIL logo , Erina Kojima , Takanori Sugimoto and Yasutoshi Sasaki
From the journal Holzforschung

Abstract

This study applied synchrotron radiation XRD to analyze the mechanical behavior of cellulose microfibrils in wood containing annual rings (thickness: 5 mm), for different layers of the secondary cell wall, under uniaxial load. Cellulose in S2 and in S1 and S3 layers were analyzed respectively, and the data were used to investigate for deformation behavior in the lattice spacing (d004). As a result, the mechanical behavior of cellulose sometimes differed from the behavior of bulk wood. The rigidity of cellulose in the S2 layer was larger than in S1 and S3 layers under both of tensile and compressive loads. However, once standardized with respect to estimated cellulose amount, this standardized rigidity was comparable across all layers and loading conditions. Variation in microfibril angle (MFA) and lattice spacing (d004) of cellulose barely changed at all under compressive load. Under tensile loads, there were both of positive and negative changes in MFA variation in both S2 layer and S1 and S3 layers, while d004 variation had little changes in almost all cases.


Corresponding author: Mariko Yamasaki, Department of Biosphere Resources Science, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan, E-mail:

Acknowledgements

This work was supported in part by the Photon-Beam Platform Project of the Ministry of Education, Culture, Sports, Science and Technology. The XRD experiments were conducted at the BL8S1 of Aichi Synchrotron Radiation Center, Aichi Science & Technology Foundation, Aichi, Japan (Approval nos. 2015PA009, 2015PB003, 2016G1012).

  1. Author contribution: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: This work was supported by Grant-in-Aid for Scientific Research (C) Number 17K06638.

  3. Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

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Received: 2019-08-29
Accepted: 2020-09-04
Published Online: 2020-10-28
Published in Print: 2021-06-25

© 2020 Walter de Gruyter GmbH, Berlin/Boston

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