Biodegradable pla-biopolymer composite films for food packaging
A research-driven approach to developing stable, biodegradable food packaging films by combining polylactic acid (PLA) with biopolymers such as PBAT, PHB, and PHBV. Films demonstrate promising optical, UV-barrier, thermal, mechanical, and antimicrobial properties, with proven shelf-life extension for perishable foods like cherry tomatoes and cheese.
Overview
This solution addresses the growing demand for sustainable food packaging by combining polylactic acid (PLA) with complementary biopolymers such as poly butylene adipate-co-terephthalate (PBAT), polyhydroxybutyrate (PHB), and poly-(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV). The resulting composite films are fully biodegradable and designed to extend the shelf life of perishable food products, including fresh produce and dairy.
The technology targets food manufacturers, packaging converters, and sustainability-focused brands seeking alternatives to conventional petroleum-based plastics. By tuning the ratio and combination of biopolymers, the films can be tailored to balance flexibility, strength, barrier performance, and antimicrobial functionality.
Technical specifications
Key features:
- Material composition: PLA blended with PBAT, PHB, or PHBV in various ratios to optimize film properties
- Fabrication methods: Solvent casting for initial prototyping; extrusion-based production targeted through partnership
- Optical properties: Transparent films with tunable UV-barrier capability to protect light-sensitive foods
- Mechanical properties: High flexibility and improved tensile performance through biopolymer blending
- Thermal properties: Enhanced thermal stability suitable for varied storage and processing conditions
- Antimicrobial functionality: Incorporation of natural active agents delivers antimicrobial and biofilm-inhibition effects
- Validated outcomes: Demonstrated shelf-life extension for cherry tomatoes and cheese in active-agent-loaded PLA-PBAT films
Technology readiness level
The PLA-PBAT combination has been validated during doctoral research, with films already characterized for structural, functional, mechanical, antimicrobial, and biofilm-inhibition properties. Initial testing has confirmed the viability of solvent-cast films for food packaging applications. Future work will expand the material matrix to include PHB and PHBV, explore additional blending ratios, and transition from solvent casting to extrusion-based manufacturing in collaboration with industry partners. The research team is actively seeking partnership to scale production methods and refine film quality for commercial relevance.
About Technological University Dublin
Technological University Dublin is a multi‑campus public technological university in Ireland’s capital, combining applied research with industry‑focused education. Companies engage through co‑located labs and prototyping facilities, campus incubators, and structured work placements that create direct pipelines to talent. Its central Grangegorman campus and additional sites place partners near Dublin’s multinational and SME ecosystem, enabling rapid iteration, testing, and demonstration. Research is supported by competitive funding from Science Foundation Ireland, Enterprise Ireland, the Irish Research Council, and EU programs. A dedicated technology transfer office manages IP, licensing, and spin‑out formation, with streamlined access to facilities and contract research.
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