Narváez-Gómez Germán, Figueroa-Flórez Jorge, Salcedo-Mendoza Jairo, Pérez-Cervera Carmen, Andrade-Pizarro Ricardo
Master of Agri-Food Sciences, University of Córdoba, Montería, Colombia.
Department of Agroindustrial Engineering, University of Sucre, Sincelejo, Colombia.
Heliyon. 2021 Apr 1;7(4):e06644. doi: 10.1016/j.heliyon.2021.e06644. eCollection 2021 Apr.
The current consumer demand for fresh food and the interest in caring for the environment have driven the development of biodegradable film packaging to replace synthetic films to preserve the integrity of food. The objective of this work was to evaluate the effects of starch modifications (oxidized, cross-linked, and dual: oxidized/cross-linked), starch concentration (1 and 2%), and glycerol concentration (5 and 15%) on water vapor permeability (WVP), mechanical properties (tensile strength and elongation), optical, and structural properties of films based on "hawthorn" yam starch. The WVP of the films was 4.4 × 10 to 1.5 × 10 g/m∗s∗Pa, where the films with oxidized yam starch showed a 58.04% reduction concerning the native starch. The tensile strength of oxidized yam starch films showed a decrease of 17.51% with an increase in glycerol concentration. For the 1% starch concentration, elongation increased by 17.03% when the glycerol concentration was increased from 5 to 15%. Modification of starch, starch concentration, and glycerol have a significant effect on the barrier, mechanical, physical, and structural properties of films made with yam starch, where films made with oxidized yam starches at a concentration of 1% starch and 5% glycerol showed the best responses of the properties evaluated.
当前消费者对新鲜食品的需求以及对环境保护的关注推动了可生物降解薄膜包装的发展，以取代合成薄膜来保持食品的完整性。这项工作的目的是评估淀粉改性（氧化、交联和双重改性：氧化/交联）、淀粉浓度（1%和2%）以及甘油浓度（5%和15%）对基于“山楂”山药淀粉的薄膜的水蒸气透过率（WVP）、机械性能（拉伸强度和伸长率）、光学性能和结构性能的影响。薄膜的WVP为4.4×10至1.5×10 g/m∗s∗Pa，其中氧化山药淀粉薄膜与天然淀粉相比水蒸气透过率降低了58.04%。氧化山药淀粉薄膜的拉伸强度随着甘油浓度的增加而降低了17.51%。对于1%的淀粉浓度，当甘油浓度从5%增加到15%时，伸长率增加了17.03%。淀粉改性、淀粉浓度和甘油对山药淀粉制成的薄膜的阻隔、机械、物理和结构性能有显著影响，其中由1%淀粉浓度和5%甘油的氧化山药淀粉制成的薄膜在评估的性能方面表现出最佳响应。
