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Cellulose

, Volume 24, Issue 6, pp 2455–2468 | Cite as

Preparation and property assessment of neat lignocellulose nanofibrils (LCNF) and their composite films

  • Thomas Horseman
  • Mehdi Tajvidi
  • Cherif I. K. Diop
  • Douglas J. Gardner
Original Paper

Abstract

Lignocellulose nanofibrils (LCNF) were produced from thermo-mechanical pulp (TMP) using a micro-grinder and were characterized with respect to fiber diameter and thermal stability. The initial water content in the TMP affected the defibrillation process and longer grinding time was necessary for the air-dried TMP, resulting in LCNF with higher fibril diameter. As compared to the reference cellulose nanofibrils (CNF) produced through a refining process, LCNF was less thermally stable and started to degrade at a temperature that was 30 °C lower than that of CNF. LCNF obtained from the never-dried TMP was combined with various additives (10 wt%) to produce composite films. The neat LCNF and composite films did not reach the mechanical properties of the neat CNF film that was evaluated as reference. However, the addition of poly(vinyl alcohol) (PVA) at 10 wt% on a dry basis did cause a 46 and 25% increase in tensile strength and elastic modulus, respectively. Other additives including cellulose nanocrystals, bentonite and CNF were also found to increase to some extent the Young’s modulus and ductility of the LCNF composite films whereas the addition of talc did not improve the film performance. Water absorption of neat LCNF films was lower than the reference CNF and was negatively affected by the addition of PVA.

Keywords

Mechanical fibrillation Lignocellulose nanofibrils Composite films Mechanical properties Thermal stability 

Notes

Acknowledgments

Funding for this research was provided by National Science Foundation (NSF) Grant # EEC-1461116 awarded to University of Maine Forest Bioproducts Research Institute (FBRI). The project was also partially funded by the University of Maine System Research Reinvestment Fund and Maine Economic Improvement Fund (MEIF).

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Copyright information

© Springer Science+Business Media Dordrecht 2017

Authors and Affiliations

  1. 1.Rose-Hulman Institute of TechnologyTerre HauteUSA
  2. 2.School of Forest Resources and Advanced Structures and Composites CenterUniversity of MaineOronoUSA
  3. 3.School of Forest ResourcesUniversity of MaineOronoUSA
  4. 4.School of Forest Resources and Advanced Structures and Composites CenterUniversity of MaineOronoUSA

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