Affiliation:
1. Food Technology Department, Laboratory of Food Packaging Universidade Federal de Viçosa Viçosa Brazil
2. Food Science & Human Nutrition Iowa State University Ames Iowa USA
3. São Carlos Institute of Physics University of São Paulo São Carlos Brazil
4. São Carlos Institute of Chemistry University of São Paulo São Carlos Brazil
5. Food Technology Department, Laboratory of Pigments and Bioactive Compounds Universidade Federal de Viçosa Viçosa Brazil
Abstract
AbstractIn order to evaluate the biodegradability of the cellulose acetate (CA) films plasticized with different concentrations of glycerol (GLY) or triethyl citrate (TEC), analysis of scanning electron microscopy (SEM), Fourier transfer infrared spectroscopy (FTIR), and thermogravimetric analyses (TGA) were conducted through 180 days. Throughout the analysis, indicators of plasticizer exudation were observed, including changes in visual appearance and mass loss, ranging from 39.141% and 20.663% (first day) up to 0.524% and 0.488% (last day) for TEC and GLY plasticizer based films, respectively. Changes were also noted in the infrared spectrum, and TGA plots with polymer degradation peaks from 332.09 to 400.96 cm−1 for both plasticizers based films (TEC and GLY, respectively), regardless of the day of analysis. All assays revealed plasticizer losses, but there was no evidence of films' biodegradation during the experimental time. In perspective, this systematic approach can be extended to study other polymers and other biodegradation conditions.
Funder
Conselho Nacional de Desenvolvimento Científico e Tecnológico
Fundação de Amparo à Pesquisa do Estado de Minas Gerais
Subject
Materials Chemistry,Polymers and Plastics,Surfaces, Coatings and Films,General Chemistry
Cited by
2 articles.
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