Super Wood
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Super Wood.[1] is a densified wood material produced by partially delignifying natural wood and subsequent densification through hot pressing. Super wood production is potentially sustainable and cost-effective, as it avoids energy-intensive manufacturing processes associated with cement and steel.[2]
Process[edit]
A typical process to produce super wood usually involves two key steps.[1] First, a chemical treatment to partially remove lignin and hemicellulose; followed by mechanical hot-pressing at 100 °C in the second step, resulting in an approximately 80% reduction in thickness. This process effectively eliminates voids and pits in natural wood, significantly reducing defects and enhancing the strength of the processed wood. The material and technology are patented.[3]
Properties[edit]
Super Wood demonstrates a remarkable tensile strength of approximately 600 MPa, surpassing all previously reported densified wood materials before.[1][4]This exceptional strength is attributed to the heightened interaction, such as hydrogen bonding, Van der Waals forces, and physical entanglements, among the alignment of cellulose nanofibrils, coupled with a substantial reduction in intrinsic defects in natural wood.[1] Despite its lightweight nature (density of ~1.3 g/cm3), Super Wood exhibits specific strength higher than most structural metals and alloys. [5]
Applications[edit]
This universally effective strategy is applicable to various wood species. The combination of high strength, toughness, low cost, abundance, light weight, and zero greenhouse gas emission positions Super Wood as a promising sustainable structural material.[6] Its potential applications include lightweight vehicles, energy-efficient buildings,[7] advanced furniture, and more.[8]
References[edit]
- ↑ 1.0 1.1 1.2 1.3 Song, Jianwei; Chen, Chaoji; Zhu, Shuze; Zhu, Mingwei; Dai, Jiaqi; Ray, Upamanyu; Li, Yiju; Kuang, Yudi; Li, Yongfeng; Quispe, Nelson; Yao, Yonggang (2018). "Processing bulk natural wood into a high-performance structural material". Nature. 554 (7691): 224–228. Bibcode:2018Natur.554..224S. doi:10.1038/nature25476. ISSN 1476-4687. PMID 29420466. Unknown parameter
|s2cid=ignored (help) - ↑ "LSU CEE Professor Lin Develops Superwood for Infrastructure". www.lsu.edu. Retrieved 2023-12-17.
- ↑ [1], "Strong and tough structural wood materials, and methods for fabricating and use thereof", issued 2018-04-09
- ↑ Researchers Make Wood Stronger than Steel, 2018-02-26, retrieved 2024-01-09
- ↑ Perkins, Sid. "Stronger Than Steel, Able to Stop a Speeding Bullet--It's Super Wood!". Scientific American. Retrieved 2023-12-17.
- ↑ Coghlan, Andy. "Eco-friendly nanowood is a super strong and recyclable styrofoam". New Scientist. Retrieved 2023-12-17.
- ↑ Lim, XiaoZhi (2019-12-31). "The super-cool materials that send heat to space". Nature. 577 (7788): 18–20. doi:10.1038/d41586-019-03911-8. PMID 31892746.
- ↑ Brown, Erik (2020-12-26). "Mankind's Next Killer App: Wood". Medium. Retrieved 2023-12-17.
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