Biodegradable thermoplastic films from hydrophobic plant proteins and natural resins for high moisture barrier packaging
A bio-based packaging material combining prolamins from cereal by-products with natural resins to create biodegradable thermoplastic films with superior moisture barrier properties. Targets sustainable packaging applications as an alternative to conventional petroleum-based plastics.
Overview
This research proposes a biodegradable thermoplastic skin layer made from the combination of hydrophobic plant proteins (prolamins) and natural resins. Prolamins are the major cereal storage proteins found in barley, wheat, and corn, and are widely available as agricultural by-products. By blending these proteins with natural resins, the resulting composite films aim to deliver excellent moisture barrier performance suitable for sustainable packaging applications, offering an environmentally responsible alternative to conventional petroleum-based plastics.
Technical specifications
Key features:
- Prolamin-based matrix: Hydrophobic plant proteins (from barley, wheat, and corn) serve as the primary film-forming component, leveraging their inherent water resistance
- Natural resin reinforcement: Incorporation of natural resins enhances barrier and mechanical properties through favorable protein–resin interactions
- Thermoplastic processing: Films are produced via thermoplastic methods, enabling scalable manufacturing
- Controlled release capability: Protein–resin combinations have demonstrated controlled release behavior, suggesting multifunctional potential beyond barrier applications
- By-product utilization: Uses cereal protein by-products, supporting circular economy and waste reduction goals
Research approach:
- Systematic evaluation of prolamin and natural resin combinations
- Investigation of blending methods, protein-to-resin ratios, and film-forming conditions
- Assessment of mechanical properties and moisture barrier performance of composite films
Technology readiness level
The technology is at an early-to-mid research and development stage. Prior work has demonstrated that barley protein thermoplastic films exhibit good moisture barrier properties, with further improvements anticipated when purified prolamins are used. The interactions between plant proteins and natural resins have been characterized and show promise for controlled release applications, though they have not yet been applied as high-barrier packaging materials. Future validation will involve a one-year study to optimize formulations and processing conditions. The team is actively seeking research partnerships to support continued development and key personnel needs.
About McGill University
McGill University is a comprehensive public research university in Montréal, Québec, known for an international community and a research‑intensive culture. Faculty and industry collaborate through shared core facilities and co‑located labs across downtown and hospital sites, with integration into a major hospital system enabling clinical research and translation. Proximity to Montréal’s established industry clusters and a vibrant innovation district give companies access to talent, pilots, and testbeds. Research is supported by Canada’s Tri‑Agency and the Canada Foundation for Innovation, alongside provincial and philanthropic sources. A dedicated technology transfer office streamlines contracting and IP, supports licensing and sponsored research, and connects partners to startups and entrepreneurship resources.
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