Engenharia de Alimentos, Instituto de Ciências Exatas e da Terra, Universidade Federal de Mato Grosso, Avenida Valdon Varjão 6.390, 78600-000 Barra do Garças, Mato Grosso, Brazil; Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas, Pelotas, Rio Grande do Sul, Brazil.
Engenharia de Alimentos, Instituto de Ciências Exatas e da Terra, Universidade Federal de Mato Grosso, Avenida Valdon Varjão 6.390, 78600-000 Barra do Garças, Mato Grosso, Brazil.
Food Chem. 2021 May 1;343:128430. doi: 10.1016/j.foodchem.2020.128430. Epub 2020 Oct 20.
In this study, the influence of the concentration of flour from jabuticaba peel (FJP) and the concentration of glycerol (CG) on the physicochemical, barrier, mechanical, optical, spectroscopic and biodegradability properties of corn starch films was evaluated using response surface methodology. The increase in the concentrations of FJP and CG enhanced the thickness and permeability to water vapor, and made the films more hydrophilic. In addition to that, the interaction between the two variables caused reduction in the solubility of the films. High concentrations of FJP and CG reduced the maximum tensile strength, and increased CG increased the elongation and decreased the young's modulus of the films. Among the tests studied, the T1 film (15.80% FJP and 15.80% CG) was biodegradable, presenting the best mechanical and barrier properties such as low water vapor permeability, solubility and water holding capacity, showing great potential to be used as biodegradable packaging system.
本研究采用响应面法评估了 jabuticaba 果皮粉（FJP）浓度和甘油（CG）浓度对玉米淀粉膜的物理化学、阻隔、机械、光学、光谱和可生物降解性的影响。FJP 和 CG 浓度的增加提高了薄膜的厚度和水蒸气透过率，使薄膜更亲水。此外，两个变量之间的相互作用导致薄膜的溶解度降低。FJP 和 CG 的高浓度降低了薄膜的最大拉伸强度，而 CG 的增加则提高了薄膜的伸长率，降低了其杨氏模量。在所研究的测试中，T1 薄膜（15.80% FJP 和 15.80% CG）可生物降解，具有最佳的机械和阻隔性能，如低水蒸气透过率、低溶解度和低持水能力，显示出作为可生物降解包装系统的巨大潜力。
