小角X射线散射
材料科学
纳米纤维素
纳米结构
纳米片
化学工程
纤维素
同步加速器
蒙脱石
层状结构
散射
复合材料
纳米技术
光学
物理
工程类
作者
Lengwan Li,Pan Chen,Lilian Medina,Lin Yang,Yoshiharu Nishiyama,Lars A. Berglund
出处
期刊:ACS Nano
[American Chemical Society]
日期:2023-08-02
卷期号:17 (16): 15810-15820
标识
DOI:10.1021/acsnano.3c03664
摘要
Cellulose nanofibrils (CNF) with 2D silicate nanoplatelet reinforcement readily form multifunctional composites by vacuum-assisted self-assembly from hydrocolloidal mixtures. The final nanostructure is formed during drying. The crystalline nature of CNF and montmorillonite (MTM) made it possible to use synchrotron X-ray scattering (WAXS, SAXS) to monitor structural development during drying from water and from ethanol. Nanostructural changes in the CNF and MTM crystals were investigated. Changes in the out-of-plane orientation of CNF and MTM were determined. Residual drying strains previously predicted from theory were confirmed in both cellulose and MTM platelets due to capillary forces. The formation of tactoid platelet stacks could be followed. We propose that after filtration, the constituent nanoparticles in the swollen, solid gel already have a "fixed" location, although self-assembly and ordering processes take place during drying.
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