Trivalent-metal-ion-exchanged transparent cnc films for food-grade barrier packaging
The University of Maine has developed transparent, multifunctional cellulose nanocrystal (CNC) films enhanced with trivalent metal ion exchange, offering improved UV and gas barrier properties for food-grade packaging. These innovative films address consumer demand for transparent packaging that preserves food by resisting oxygen, moisture, and UV radiation, while maintaining biodegradability.
The University of Maine's Advanced Structures & Composites Center has created innovative cellulose nanocrystal (CNC) films that are transparent and multifunctional, suitable for food-grade barrier packaging. These films utilize trivalent metal ion exchange to enhance their UV and gas barrier properties, making them effective at protecting food from oxygen, moisture, and ultraviolet light. The technology offers a sustainable and biodegradable alternative to traditional opaque or metalized packaging, aligning with increasing consumer demand for transparent packaging options that allow viewing of food while ensuring preservation. The research, published in ACS Sustainable Chemistry & Engineering, demonstrates the films' potential for commercial application in food preservation, leveraging CNCs' natural properties combined with advanced chemical modifications. These films are at a stage of ongoing pilot testing and licensing discussions, indicating a move toward market readiness.
About University of Maine
The University of Maine is a comprehensive public research university and the state’s flagship, coupling broad academic depth with an applied, industry‑oriented culture. On campus, companies access large‑scale prototyping facilities, pilot‑scale lines, and specialized test tanks that move concepts toward deployable systems. A statewide Cooperative Extension and field sites connect R&D teams to real‑world conditions across Maine’s coastal, forested, and cold‑weather settings, while industry liaisons streamline sponsored research. Funding comes from competitive federal sources such as the National Science Foundation, Department of Energy, U.S. Department of Agriculture, and the National Oceanic and Atmospheric Administration, while a centralized tech transfer office supports IP, licensing, SBIR/STTR, and startup formation.
delivered to your inbox.