en.Wedoany.com Report on Mar 26th, As the environmental and health impacts of non-biodegradable packaging materials receive increasing attention, finding sustainable alternatives has become a crucial direction. European researchers have developed a novel composite film, made from Tempo-oxidized cellulose nanofibers (TOCNF) and hyaluronic acid (HA) coordinated with calcium chloride (CaCl₂), bringing new advancements to packaging technology.

This bio-based film demonstrates excellent gas barrier properties, with a water vapor permeability (WVP) value of 85.21 g·μm·m⁻²·day⁻¹·kPa⁻¹ and an oxygen permeability (OP) value of 9.72 mL·μm·m⁻²·day⁻¹·atm⁻¹. When applied to kraft paper surfaces, the coated paper achieves a 12/12 kit rating for oil resistance, effectively blocking the penetration of hot oil at 230°C. The film also possesses high transparency, mechanical strength, and thermal stability.

Research indicates that the TOCNF/HA composite film has the potential to serve as a fluorine-free, biodegradable alternative material for industrial packaging. It combines high-performance characteristics with environmental sustainability, offering a new pathway for developing eco-friendly packaging solutions that meet both functional and ecological requirements. This achievement comes from the research of Zou, Zhao, and Ren, published in the Journal of Coatings Technology and Research, Volume 23, 2026.