材料科学
三元运算
韧性
超分子化学
变形(气象学)
复合材料
模数
纳米技术
刚度
石墨烯
纳米复合材料
结晶学
晶体结构
化学
计算机科学
程序设计语言
作者
Yuyuan Sun,Wei Fan,Chen Zou,Lihong Wei,Jiaqi Liu,Xu Yan
出处
期刊:ACS Sustainable Chemistry & Engineering
[American Chemical Society]
日期:2019-03-05
卷期号:7 (7): 6851-6858
被引量:19
标识
DOI:10.1021/acssuschemeng.8b06230
摘要
Strong and tough structural materials are a challenging materials engineering problem that has drawn considerable attention among the materials community. Here we demonstrate that ternary supramolecular ensembles of cellulose nanocrystals-polyvinyl alcohol-glucose by evaporation-induced corporative assembly achieved simultaneous enhancement on the stiffness and toughness with the Young's modulus of 13 GPa at the work-of-fracture of 1.1 MJ·m–3. Compositional alteration led to stiff and tough ternary ensembles with the Young's modulus up to 14.7 GPa and the toughness up to 12.1 MJ·m–3, respectively. Concurrent enhancement in the stiffness and toughness was owing to the multiscale deformation involving weak interactions and helicoidal organization, leading to more efficient energy dissipation. The freestanding transparent films of the ternary ensembles exhibited dynamic selective reflection of left-handed circularly polarized light in response to mechanical and chemical stimuli. The combination of the mechanical, chemical, and sustainability-linked advantages with the stimuli-responsive selective reflection of circularly polarized light renders the ternary ensembles promising potentials as an implant for remote monitoring of mechanical strain and as a camouflaging material for security applications.
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