Cellulose

, Volume 23, Issue 6, pp 3601–3609

Correlation between structural properties and iridescent colors of cellulose nanocrystalline films

  • M. Ličen
  • B. Majaron
  • J. Noh
  • C. Schütz
  • L. Bergström
  • J. Lagerwall
  • I. Drevenšek-Olenik
Original Paper

Abstract

We investigate the effect of shear flow applied during the drying of aqueous suspension of cellulose nanocrystals on optical reflective properties and structural characteristics of the resulting solidified films. Shear flow can significantly improve internal structural homogeneity of the films, while its effect on optical reflective properties is relatively minor. The measured width of the selective reflection peak is an order of magnitude larger than expected for an ideal helically modulated structure, which reflects a distribution of pitch values and possibly also of regimes of distorted helical modulation. We attribute these imperfections to the broad size distribution of the cellulose nanocrystals.

Keywords

Cellulose nanocrystals Chiral nematic liquid crystal Iridescent films Shear stress Optical reflectance spectroscopy Scanning electron microscopy 

Copyright information

© Springer Science+Business Media Dordrecht 2016

Authors and Affiliations

  1. 1.Department of Complex MatterJ. Stefan InstituteLjubljanaSlovenia
  2. 2.Physics and Materials Science Research UnitUniversity of LuxembourgLuxembourgLuxembourg
  3. 3.Department of Materials and Environmental ChemistryStockholm UniversityStockholmSweden
  4. 4.Faculty of Mathematics and PhysicsUniversity of LjubljanaLjubljanaSlovenia
  5. 5.Department of Chemical EngineeringKU Leuven, Campus Kulak KortrijkKortrijkBelgium

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