News Coatings Technologies
Sustainable TOCNF/HA composite films enhance gas barrier and oil resistance in packaging
Researchers introduce Tempo-oxidised cellulose nanofiber and hyaluronic acid composite films that offer high gas barrier properties, oil resistance, and sustainability for advanced packaging applications.
Growing concerns over the environmental and health impacts of non-biodegradable packaging materials have intensified the search for sustainable alternatives. This study presents a breakthrough in packaging technology with the development of composite films made from Tempo-oxidised cellulose nanofibers (TOCNF) and hyaluronic acid (HA), coordinated with calcium chloride (CaCl₂). These bio-based films offer impressive gas barrier properties, with water vapor permeability (WVP) values of 85.21 g·μm·m⁻²·day⁻¹·kPa⁻¹ and oxygen permeability (OP) values of 9.72 mL·μm·m⁻²·day⁻¹·atm⁻¹.
When transferred onto kraft paper, the coated paper achieved a 12/12 kit rating for oil resistance, effectively preventing hot oil penetration at 230 °C. Additionally, the composite films demonstrated excellent transparency, mechanical strength, and thermal stability.
Reading tip: Bio-based coatings
The EC Tech Report “”Bio-based Coatings“” is a hand-picked compilation of all the key aspects concerning bio-based coatings, offering the latest technical developments. Leading R&D experts present their various binder developments, how binders can be produced sustainably and also how the performance of your coatings can be optimised. Exclusive market insights and data as well as an impressive package of digital bonus material round off this Tech Report.
A sustainable solution for industrial packaging
This research highlights the potential of TOCNF/HA composite films as non-fluorinated, biodegradable alternatives for industrial packaging. By combining high-performance characteristics with environmental sustainability, these films pave the way for eco-friendly packaging solutions that address both functional and ecological demands.
Source: Zou, Y., Zhao, L., & Ren, J., Enhancing gas barrier properties and oil resistance in packaging: a study on TOCNF/HA composite films. Journal of Coatings Technology and Research, Volume 23, pages 717–726 (2026).
