材料科学
木质素
结构材料
硬木
定向刨花板
工程木材
复合材料
木材加工
机械工程
工程类
化学
生态学
生物
有机化学
作者
Shaoliang Xiao,Chaoji Chen,Qinqin Xia,Yu Liu,Yuan Yao,Qiongyu Chen,Matt Hartsfield,Alexandra H. Brozena,Kunkun Tu,Stephen J. Eichhorn,Yonggang Yao,Jianguo Li,Wentao Gan,Sheldon Q. Shi,Vina W. Yang,Marco Lo Ricco,Junyong Zhu,Ingo Burgert,Alan A. Luo,Teng Li,Liangbing Hu
出处
期刊:Science
[American Association for the Advancement of Science (AAAS)]
日期:2021-10-22
卷期号:374 (6566): 465-471
被引量:129
标识
DOI:10.1126/science.abg9556
摘要
Wood is a sustainable structural material, but it cannot be easily shaped while maintaining its mechanical properties. We report a processing strategy that uses cell wall engineering to shape flat sheets of hardwood into versatile three-dimensional (3D) structures. After breaking down wood’s lignin component and closing the vessels and fibers by evaporating water, we partially re-swell the wood in a rapid water-shock process that selectively opens the vessels. This forms a distinct wrinkled cell wall structure that allows the material to be folded and molded into desired shapes. The resulting 3D-molded wood is six times stronger than the starting wood and comparable to widely used lightweight materials such as aluminum alloys. This approach widens wood’s potential as a structural material, with lower environmental impact for buildings and transportation applications.
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