Abstract
This study investigated the characteristics of radial cracks in Castanopsis hystrix wood and evaluated its dimensional stability after impregnation with low-molecular-weight polyacrylate (PA), melamine-urea-glyoxal (MUG), and melamine-urea-formaldehyde (MUF) resins. The physical properties were examined by dimensional stability measurements, dynamic vapor sorption (DVS) analysis, and scanning electron microscopy (SEM). The results showed that radial cracks were easily produced in the transverse section of untreated wood during drying. The surfaces of the radial cracks exhibited an even and clean structure without fluffs on the pair of surfaces, and cracks spanned 4–5 annual rings. The resin-impregnated wood showed no radial cracks on its transverse surface. C. hystrix wood modified with MUG and MUF exhibited a higher weight percentage gain (WPG) than wood modified with the same concentration of PA resin. The resin-impregnated C. hystrix wood also showed reduced anisotropy and improved dimensional stability. The SEM images of the modified wood showed that the wood pits and cells were filled with resin, while the cell wall surfaces were covered with a layer of resin.
Funding source: Guangxi Key Research and Development Program
Award Identifier / Grant number: No. Guike AB22035071
Acknowledgments
We would like to express our gratitude for assistance on language modification by Mr. Zhang Shifeng at Beijing Forestry University.
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Research ethics: Not applicable.
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Author contributions: Bailing Sun designed the research. Surong Meng and Yingying Su: Data analysis, Writing original draft. Bailing Sun and Anmin Huang: Writing-review and editing. All authors read and approved the manuscript.
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Competing interest: The authors declare that they have no conflicts of interest regarding this article.
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Research funding: This study was funded by the Guangxi Key Research and Development Plan, China. (Grant No. Guike AB22035071).
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Data availability: The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.
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