Yu Zhi-Long, Yang Ning, Zhou Li-Chuan, Ma Zhi-Yuan, Zhu Yin-Bo, Lu Yu-Yang, Qin Bing, Xing Wei-Yi, Ma Tao, Li Si-Cheng, Gao Huai-Ling, Wu Heng-An, Yu Shu-Hong
Division of Nanomaterials and Chemistry, Hefei National Research Center for Physical Sciences at the Microscale, Chinese Academy of Sciences (CAS) Center for Excellence in Nanoscience, Hefei Science Center of CAS, Collaborative Innovation Center of Suzhou Nano Science and Technology, Department of Chemistry, University of Science and Technology of China, Hefei 230026, China.
CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, CAS Center for Excellence in Complex System Mechanics, University of Science and Technology of China, Hefei 230027, China.
Sci Adv. 2018 Aug 10;4(8):eaat7223. doi: 10.1126/sciadv.aat7223. eCollection 2018 Aug.
Woods provide bioinspiration for engineering materials due to their superior mechanical performance. We demonstrate a novel strategy for large-scale fabrication of a family of bioinspired polymeric woods with similar polyphenol matrix materials, wood-like cellular microstructures, and outstanding comprehensive performance by a self-assembly and thermocuring process of traditional resins. In contrast to natural woods, polymeric woods demonstrate comparable mechanical properties (a compressive yield strength of up to 45 MPa), preferable corrosion resistance to acid with no decrease in mechanical properties, and much better thermal insulation (as low as ~21 mW m K) and fire retardancy. These bioinspired polymeric woods even stand out from other engineering materials such as cellular ceramic materials and aerogel-like materials in terms of specific strength and thermal insulation properties. The present strategy provides a new possibility for mass production of a series of high-performance biomimetic engineering materials with hierarchical cellular microstructures and remarkable multifunctionality.
由于木材具有卓越的机械性能，因此可为工程材料提供生物灵感。我们展示了一种新颖的策略，通过传统树脂的自组装和热固化过程，大规模制造出一系列具有类似多酚基体材料、类木材细胞微观结构和出色综合性能的生物启发聚合物木材。与天然木材相比，聚合物木材表现出相当的机械性能（抗压屈服强度高达45MPa），对酸具有更好的耐腐蚀性且机械性能无下降，以及更好的隔热性能（低至约21mW m K）和阻燃性。这些受生物启发的聚合物木材在比强度和隔热性能方面甚至优于其他工程材料，如多孔陶瓷材料和气凝胶类材料。本策略为大规模生产一系列具有分层细胞微观结构和显著多功能性的高性能仿生工程材料提供了新的可能性。
