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Functional characterization of biodegradable films obtained from whole Paecilomyces variotii biomass

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Abstract

The indiscriminate use of petroleum-based polymers and plastics for single-use food packaging has led to serious environmental problems due the non-biodegradable characteristics. Thus, much attention has been focused on the research of new biobased and biodegradable materials. Yeast and fungal biomass are low-cost and abundant sources of biopolymers with highly promising properties for the development of biodegradable materials. This study aimed to select a preparation method to develop new biodegradable films using the whole biomass of Paecilomyces variotii subjected to successive physical treatments including ultrasonic homogenization (US) and heat treatment. Sterilization process had an important impact on the final filmogenic dispersion and mechanical properties of the films. Longer US treatments produced a reduction in the particle size and the application of an intermediate UT treatment contributed favorably to the breaking of agglomerates allowing the second US treatment to be more effective, achieving an ordered network with a more uniform distribution. Samples that were not filtrated after the sterilization process presented mechanical properties similar to plasticized materials. On the other hand, the filtration process after sterilization eliminated soluble and hydratable compounds, which produced a reduction in the hydration of the films.

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Data are available on request.

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Funding

The authors of this article acknowledge the financial support from National University of Quilmes (UNQ, Argentina) through R&D program (Expediente 1300/19).

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All authors contributed to the study’s conception and design. Material preparation, data collection and analysis were performed by Ezequiel A. Martinez, Macarena R. Sanchez-Díaz, Andres G. Salvay, Vanesa Ludemann, and Mercedes A. Peltzer. The funds were managed by Vanesa Ludemann. The manuscript was written and approved by all authors.

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Correspondence to Mercedes A. Peltzer.

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Martinez, E.A., Salvay, A.G., Sanchez-Díaz, M.R. et al. Functional characterization of biodegradable films obtained from whole Paecilomyces variotii biomass. Int Microbiol (2024). https://doi.org/10.1007/s10123-024-00501-1

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  • DOI: https://doi.org/10.1007/s10123-024-00501-1

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