Physical and morphological properties of UV-cured cellulose nanocrystal (CNC) based nanocomposite coatings for wood furniture

Published Date
April 2016, Vol.93:17–22, doi:10.1016/j.porgcoat.2015.12.009

Author 

• Alireza Kaboorani ^a,,
• Nicolas Auclair ^a,
• Bernard Riedl ^a,
• Véronic Landry ^a,b,

• aDépartement des sciences du bois et de la forêt, Faculté de foresterie, de géographie et de géomatique, Université Laval, 2425, rue de la Terrasse, Québec, QC G1V 0A6, Canada
• bFPInnovations, 319 rue Franquet, Québec, QC G1P 4R4, Canada

Received 9 May 2015. Revised 29 November 2015. Accepted 19 December 2015. Available online 12 January 2016.

Highlights

• •
  Cellulose nanocrystal (CNC) modified by a cationic surfactant (hexadecyltrimethylammonium (HDTMA)) showed good compatibility with the UV curable high solid content wood coating system.
• •
  Modified CNC improved barrier and optical properties of resulted nanocomposite coatings.
• •
  The dispersion quality of modified CNC in the matrix was a function of CNC loading level.

Abstract

In this study, UV curable high solid content wood coating systems with high performance were developed by using cellulose nanocrystal (CNC). CNC modified by a cationic surfactant was added to the coating system at two loadings (1 and 3%). Water uptake and permeability, optical clarity and glass transition temperatures (T_g) of these new nanocomposite coatings were measured. The quality of CNC dispersion in the matrix was also studied. Results showed that CNC improved the barrier and optical properties of the nanocomposite coatings. T_g of the polymer matrix did not change significantly with the addition of CNC. The quality of CNC dispersion in the polymer matrix was a function of CNC loading. High CNC loading (3%) resulted in sizable agglomeration, but this agglomeration did not negatively impact coating performance.

Graphical abstract

Keywords

• Wood furniture
• Cellulose nanocrystal (CNC)
• Nanocomposite coatings
• Water permeability
• Transparency
• Glass transition temperature (T_g)

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• ⁎ 
  Corresponding author.
  
  

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