Low-value wood for sustainable high-performance structural materials
Low-value wood for sustainable high-performance structural materials
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DOI：
10.1038/s41893-022-00887-8
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发表时间：
2022-05-19
影响因子：
27.6
通讯作者：
Rojas, Orlando J.
中科院分区：
文献类型：
--
作者：
Dong, Xiaofei;Gan, Wentao;Rojas, Orlando J.
木材是一种可再生和环保的资源，在各个行业，特别是与建筑和建筑材料相关的行业，都有很大的希望促进可持续发展。为了最大限度地利用木材，我们在这里展示了一种加工路线，将低价值的木材(残留、损坏、腐烂、处置或断裂)转化为轻质而坚固的结构材料。这个过程包括脱木素，结合部分溶解和再生，使原本存在于细胞壁的纤维素纤维暴露出来。后者在InterPhase上形成了强大的氢键网络，从而产生了机械强度超过典型金属和商业层压木材的“固化”木材。此外，木材的可回收性以及对有机溶剂的优异耐受性，为低价值木材提供了一条很有前途的价格化和可持续性途径。木材是最可再生的材料之一，在建筑和其他工业中应用。作者展示了一种过程，通过将低价值的木材和生物质残留物转化为具有与金属和其他结构元素相当的机械性能的材料，赋予它们新的生命。
Wood is a renewable and eco-friendly resource with great promise to advance sustainability in various industries, particularly those associated with construction and building materials. To maximize wood uses, here we show a processing route that transforms low-value wood (residual, damaged, decayed, disposed or fractured) into lightweight and strong structural materials. The process involves delignification, combined with partial dissolution and regeneration, to expose cellulose fibrils originally present in the cell walls. The latter form strong hydrogen bonding networks at interphases, leading to a 'healed' wood with a mechanical strength that exceeds that of typical metals and commercial laminated wood. Moreover, recyclability as well as excellent resistance against organic solvents are demonstrated, providing a promising valorization and sustainability pathway for low-value wood.Wood is one of the most renewable materials with applications in construction and other industries. The authors show a process that gives low-value wood and biomass residuals a new life by transforming them into materials with mechanical properties comparable to metals and other structural elements.