Residual Strain and Nanostructural Effects during Drying of Nanocellulose/Clay Nanosheet Hybrids: Synchrotron X-ray Scattering Results

Lengwan Li, Pan Chen, Lilian Medina, Lin Yang, Yoshiharu Nishiyama*, Lars A. Berglund*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)15810-15820
Number of pages11
JournalACS Nano
Volume17
Issue number16
DOIs
Publication statusPublished - 22 Aug 2023

Keywords

  • Scherrer size
  • biocomposite
  • layered silicate
  • nanocomposite
  • orientation

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Li, L., Chen, P., Medina, L., Yang, L., Nishiyama, Y., & Berglund, L. A. (2023). Residual Strain and Nanostructural Effects during Drying of Nanocellulose/Clay Nanosheet Hybrids: Synchrotron X-ray Scattering Results. ACS Nano, 17(16), 15810-15820. https://doi.org/10.1021/acsnano.3c03664