Abstract
The changes in chemical composition and micro-mechanical properties of Moso Bamboo fiber cells were evaluated by applying saturated steam heat treatment at 160, 170, and 180 °C for periods of 4, 6, and 8 min, and subsequent analysis by X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopic, and nanoindentation methods. The hemicellulose and cellulose content decreased as expected, while the relative lignin content showed an upward trend. Significant changes in the bamboo micro-structure were detected by scanning electron microscope under the action of high-temperature and saturated steam. Both temperature and time were shown to affect micromechanical properties of the bamboo cell wall. In addition, higher cell wall elastic modulus and hardness were observed (a rise from 16.1 to 19.2 GPa and from 0.6 to 0.8 GPa, respectively), as compared with those of the untreated sample. Meanwhile, the creep ratio decreased after saturated steam heat treatment.
Funding source: Project of “13th Five-Year” National Key R&D Plan
Award Identifier / Grant number: 2017YFD0600801
Funding source: National Natural Science Foundation of China
Award Identifier / Grant number: Nos. 31971740 and 31901374
Funding source: Key University Science Research Project of Jiangsu Province
Award Identifier / Grant number: 17KJA220004
Funding source: Zhejiang Provincial Collaborative Innovation Center for Bamboo Resources and High-Efficiency Utilization
Award Identifier / Grant number: 2017ZZY2-06
Funding source: National Forestry and Grassland Administration
Award Identifier / Grant number: KJZXZZ201900X
Funding source: Key Research and Development Project of Fujian Province
Award Identifier / Grant number: 2019N3014
Funding source: Priority Academic Program Development of Jiangsu Higher Education Institutions
Funding source: National First-Class Disciplines
Funding source: Doctorate Fellowship Foundation of Nanjing Forestry University
Acknowledgments
We would like to thank TopEdit (www.topeditsci.com) for the English language editing of this manuscript.
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Author contributions: Conceptualization, Y.L; investigation, Z.W, and R.Y.; project administration Y.L; data curation X.H. and W.S.; writing/original draft preparation, T.Y. and Z.W. All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
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Research funding: This research was funded by the National Natural Science Foundation of China (Nos. 31971740 and 31901374), Project of “13th Five-Year” National Key R&D Plan (2017YFD0600801), Key University Science Research Project of Jiangsu Province (Grant No. 17KJA220004), Zhejiang Provincial Collaborative Innovation Center for Bamboo Resources and High-Efficiency Utilization (Grant No. 2017ZZY2-06), Forestry Science and Technology Development Project of the National Forestry and Grassland Administration (Grant No. KJZXZZ201900X), Key Research and Development Project of Fujian Province (Grant No. 2019N3014), a project funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), and by the National First-Class Disciplines (PNFD). Supported by the Doctorate Fellowship Foundation of Nanjing Forestry University.
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Conflict of interest statement: The authors declare that they have no conflicts of interest regarding this article.
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