Biomimetic Materials with Multiple Protective Functionalities
Biomimetic Materials with Multiple Protective Functionalities
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具有多重防护功能的仿生材料
DOI：
10.1002/adfm.201901058
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发表时间：
2019-07-01
影响因子：
19
通讯作者：
You, Zhengwei
中科院分区：
文献类型：
--
作者：
Liu, Zenghe;Zhang, Luzhi;You, Zhengwei
天然组织具有优异的材料特性，如自我修复、机械稳健性和机械梯度，使生物体能够在危险的环境中适应和生存。尽管非常需要，但赋予这些仿生保护特性的合成材料仍然是一个挑战。在这里，多用途的二甲基乙氧肟-聚氨酯（DOU）部分被用来制造多功能聚氨酯（du - pu）。DOU的反应活性包括可逆解离、金属配位、光解自愈、高强度和韧性、形成机械梯度和空间可控功能化。通过加入DOU，生产出具有优异的抗机械损伤，室温快速自愈和防伪功能的多功能保护膜。这种超级仿生薄膜有望在保护电子产品、文凭、货币、汽车等各种贵重物品方面发挥重要作用。
Natural tissues possess superior material properties such as self-healing, mechanical robustness, and mechanical gradients that allow organisms to adapt and survive in dangerous environments. Although highly desired, imparting synthetic materials with these biomimetic protective features remains a challenge. Here, the versatile dimethylglyoxime-urethane (DOU) moiety is used to create a multifunctional polyurethane (DOU-PU). The reactivities of DOU including reversible dissociation, metal coordination, photolysis enabled self-healing, high strength and toughness, mechanical gradient formation, and spatially controlled functionalization. By incorporating DOU, a multifunctional protective film is produced with superior resistance to mechanical damage, rapid room temperature self-healing, and anti-counterfeiting features. This super biomimetic film is expected to be very useful for the protection of various types of valuable objects such as electronics, diplomas, currency, and automobiles.