Nanostructure and Properties of Nacre-Inspired Clay/Cellulose Nanocomposites-Synchrotron X-ray Scattering Analysis
Nanostructure and Properties of Nacre-Inspired Clay/Cellulose Nanocomposites-Synchrotron X-ray Scattering Analysis
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DOI：
10.1021/acs.macromol.9b00333
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发表时间：
2019-04-23
期刊：
影响因子：
5.5
通讯作者：
Berglund, Lars A.
中科院分区：
文献类型：
--
作者：
Medina, Lilian;Nishiyama, Yoshiharu;Berglund, Lars A.
纳米粘土复合材料具有优异的力学性能，包括透光性、气体阻隔性和阻燃性，但其力学性能仍低于复合材料微观力学的预测。研究了蒙脱土/纳米纤维素复合材料的性能与粘土含量的关系，发现其杨氏模量最高可达28 GPa。然而，当粘土含量为0 ~ 80%时，其极限强度从280 MPa下降到125 MPa。分析了同步辐射的小角和广角x射线散射数据，提出了纳米结构和相相互作用因素对这些观测结果负责。讨论的参数包括血小板有效模量、血小板面外取向分布、纳米孔隙度和血小板团聚状态。
Nacre-inspired clay nanocomposites have excellent mechanical properties, combined with optical transmittance, gas barrier properties, and fire retardancy, but the mechanical properties are still below predictions from composite micromechanics. The properties of montmorillonite clay/nanocellulose nanocomposite hybrids are investigated as a function of clay content and show a maximum Young's modulus as high as 28 GPa. Ultimate strength, however, decreases from 280 to 125 MPa between 0 and 80 wt % clay. Small angle and wide-angle X-ray scattering data from synchrotron radiation are analyzed to suggest nanostructural and phase interaction factors responsible for these observations. Parameters discussed include effective platelet modulus, platelet out-of-plane orientation distribution, nanoporosity, and platelet agglomeration state.