Abstract
This work aimed to develop films based on pequi (Caryocar brasiliense) pulp added of gelatin and plasticizer (glycerol or sorbitol) and characterize their properties and biodegradation in different soils. The films were presented with a good appearance, easy to handle, and with a predominant yellowish color. The greater the addition of plasticizers (3.5%), the greater the elongation and the lower the tensile strength of the films. The higher the gelatin (7%) and the lower the plasticizer (1.5%) concentrations, the higher the tensile strength. Thermal analysis allowed to observe a desirable characteristic for packing films: a band between 2Ɵ = 21° for both glycerol and sorbitol films, which is present in low crystalline films, reducing the incidence of light in the products. Films were at the most 100% degraded over a period of 5 to 9 days. Thus, the films obtained are recommended to be utilized for food packaging applications.
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Data availability
The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.
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The authors gratefully thank the Brazilian research funding agencies CNPq, CAPES, and FUNDECT for the financial support.
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AOS: investigation, formal analysis, writing—original draft; FMF: methodology, investigation, formal analysis; GGF: conceptualization, validation, formal analysis, investigation, writing—original draft, review and editing, supervision.
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Highlights
• Films were developed with pequi pulp added of gelatin and plasticizer.
• Films with 7.0% gelatin and 1.5% plasticizer had higher tensile strength.
• The different types of soil interfered in the decomposition of the polymers.
• Films were at the most 100% degraded over a period of 5 to 9 days.
• Thermal analysis indicated desirable characteristic for food packing films.
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da Silva, A.O., Fakhoury, F.M. & Fonseca, G.G. Development of highly biodegradable and sustainable films based on pequi pulp. Biomass Conv. Bioref. 14, 10161–10176 (2024). https://doi.org/10.1007/s13399-022-03047-2
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DOI: https://doi.org/10.1007/s13399-022-03047-2