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Structural Variations in Hybrid All-Nanoparticle Gibbsite Nanoplatelet/Cellulose Nanocrystal Multilayered Films

Cellulose nanocrystals (CNCs) are promising biosourced building blocks for the production of high performance materials. In the last ten years, CNCs have been used in conjunction with polymers for the design of multilayered thin films via the layer-by-layer assembly technique. Herein, polymer chains have been replaced with positively charged inorganic gibbsite nanoplatelets (GN) to form hybrid “nanoparticle-only” composite films. A combination of atomic force microscopy and neutron reflectivity experiments was exploited to investigate the growth and structure of the films. Data show that the growth and density of GN/CNC films can be tuned over a wide range during preparation by varying the ionic strength in the CNC suspension and the film drying protocol. Specifically, thin and dense multilayered films or very thick, more porous mixed slabs, as well as intermediate internal structures, could be obtained in a predictable manner. The influence of key physicochemical parameters on the multilayer film buildup...

Authors:   Clélia Martin; Robert Barker; Erik B. Watkins; Frédéric Dubreuil; Emily D. Cranston; Laurent Heux; Bruno Jean
Journal:   Langmuir
Year:   2017
DOI:   10.1021/acs.langmuir.7b02352
Publication date:   02-Aug-2017
Facts, background information, dossiers
  • density
  • cellulose nanocrystals
  • building blocks
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