Alginate-chitosan-pla biodegradable blend films for sustainable packaging
Sustainable biodegradable blend films combining alginate from brown algae, chitosan from seafood waste, and PLA for moisture-resistant packaging applications. Developed by Tecnológico de Monterrey's Sustainable and Applied Biotechnology lab using extrusion technology and agro-industrial byproducts.
Overview
This solution offers biodegradable blend films formulated from three complementary biopolymers: alginate extracted from Sargassum brown algae biomass, chitosan derived from seafood industry waste (shrimp shells), and poly-lactic acid (PLA) synthesized from corn stover. The combination leverages the film-forming, antimicrobial, and chemical stability properties of chitosan with the moisture barrier characteristics of PLA and alginate. The resulting blend films are designed for sustainable packaging applications, particularly for dry goods, offering a high-performance alternative to conventional petroleum-based plastics while valorizing agro-industrial and seafood waste streams.
Technical specifications
Key features:
- Alginate extraction from Sargassum biomass using citric acid solution and ethanol precipitation
- Chitosan production through alkali deacetylation of chitin from shrimp shell waste
- Extrusion processing using a rod die extruder to produce blended films with controlled thickness
- Plasticizer optimization using glycerol, sorbitol, and soy oil at varying weight ratios to regulate barrier and mechanical properties
- Comprehensive characterization including FTIR spectroscopy, SEM microstructure analysis, moisture sorption testing, and mechanical property assessment
- Biobased composition utilizing three biodegradable polymers from renewable and waste-derived feedstocks
Material benefits:
- High water resistance and mechanical strength
- Improved gas exchange and water vapor transmission control
- Antimicrobial properties from chitosan component
- Full biodegradability across all three polymer components
Technology readiness level
The blend films have been produced and characterized at laboratory scale, with initial validation of thickness, moisture sorption, structure (FTIR and SEM), and barrier properties completed. A proof of concept targeting packaging for dry goods is planned within six months. The research team is actively seeking a partnership that provides materials chemistry expertise to further establish blend behavior in packaging applications. Funding requirements include equipment access and key personnel support. The technology is currently at a development stage suitable for collaborative refinement and pilot-scale evaluation toward commercialization.
About Tecnológico de Monterrey
Tecnológico de Monterrey is a leading private, multi-campus research university in Mexico, recognized for entrepreneurship and industry collaboration. Its Monterrey headquarters anchors an urban innovation district with open lab space, prototyping, and shared testing facilities that welcome corporate collaborators. An integrated health system supports clinical research and translation, while structured internships and challenge-driven partnerships connect companies with faculty and student talent year-round. Research is supported by competitive federal funding through Mexico’s national science and technology council, along with industry contracts and international sponsors. A dedicated technology transfer office manages IP, licensing, and startup formation.
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