Created with Sketch.

12. Sep 2018 | Coatings Technologies

Influence of modified cellulose nanocrystals (CNC) on performance of bionanocomposite coatings

In a new study, a renewable reinforcement, namely cellulose nanocrystals (CNC), was used to develop a bio-based nanocomposite UV-cured coating system with improved performance.

Cellulose nanocrystals (CNC) was used in a new study to develop a bio-based nanocomposite UV-cured coating system. Source: eyectronic –

CNC was modified in order to be compatible with the nonpolar polymer matrix (acrylated epoxidised soybean oil (AESO)). The CNC was modified by two methods, with acryloyl chloride or a cationic surfactant (HDTMA). The mechanical properties and structure of bionanocomposites were evaluated.

Increase of tensile strength and MOE

The addition of CNC increased modulus of elasticity (MOE) and tensile strength of the cured film coatings. Use of CNC modified by HDTMA and acrylated CNC led to a higher increase in tensile strength and MOE, relative to un-modified CNC. Best performance enhancement was in hardness and reduced elastic modulus (Er), measured by the nanoindentation technique, which were improved several fold by CNC addition.

Improvement of film hardness

Hardness, Er, MOE and tensile strength increased with CNC loading level in the matrix. Hardness measurements of cured film coating by pencil hardness test methods confirmed that CNC improved the hardness of the films. Studying the morphology of the nanocomposites revealed that surface modification method of CNC affected nanocomposite film structure and thus the mechanical properties.

The study is published in: Progress in Organic Coatings Volume 123, October 2018, Pages 27-34.

EC Library Light Stabilizers for Coatings


Light Stabilizers for Coatings

Paint flaking off an object is a serious concern in the coatings industry - now in its 2nd edition, this book explains how paint finishes can efficiently be stabilized and protected. The authors illustrate the underlying principles of paint degradation clearly and highlight the functions and possible applications of common light stabilizers with the help of numerous practical examples. A valuable guide for formulators seeking to expand and consolidate their knowledge in the field of light stabilization !


This could also be interesting for you!


You are currently not logged in

To leave a comment, please log in.

For continuously improving and optimizing our websites, we use cookies. By using our website, you agree to the usage of cookies. For more information, please visit our Privacy policy.