Nanostructure and Properties of Nacre-Inspired Clay/Cellulose NanocompositesSynchrotron X‑ray Scattering Analysis

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 nan...

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Bibliographic Details
Published in:Macromolecules 2019-04, Vol.52 (8), p.3131-3140
Main Authors: Medina, Lilian, Nishiyama, Yoshiharu, Daicho, Kazuho, Saito, Tsuguyuki, Yan, Max, Berglund, Lars A
Format: Article
Language:English
Subjects:
Analytical chemistry
Chemical Sciences
Cristallography
Engineering Sciences
Fiber- och polymervetenskap
Fibre and Polymer Science
Food and Nutrition
Life Sciences
Material chemistry
Materials
or physical chemistry
Polymers
Theoretical and
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Summary: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.
ISSN:0024-9297
1520-5835
1520-5835
DOI:10.1021/acs.macromol.9b00333