Key Laboratory of Tropical Crop Products Processing of Ministry of Agriculture and Rural Affairs, Agricultural Products Processing Research Institute, Chinese Academy of Tropical Agricultural Sciences, Zhanjiang, Guangdong, 524001, China; State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi, 330047, China.
Key Laboratory of Tropical Crop Products Processing of Ministry of Agriculture and Rural Affairs, Agricultural Products Processing Research Institute, Chinese Academy of Tropical Agricultural Sciences, Zhanjiang, Guangdong, 524001, China.
Carbohydr Polym. 2021 Mar 15;256:117579. doi: 10.1016/j.carbpol.2020.117579. Epub 2020 Dec 31.
This study aimed to develop an active edible film based on carboxymethyl chitosan (CMCS) and pullulan (Pul) incorporated with galangal essential oil (GEO) by the casting method. And their physical properties, structural and preservation effect on mangoes were characterized. The CMCS/Pul ratio was determined to be 2.5:2.5 after the optimization of physical properties, mechanical properties and barrier properties of the blend film. The results of FT-IR and XRD showed that hydroxyl groups of Pul interacted with the carboxyl groups of CMCS and the blend films had good compatibility. Good thermal stability of CMCS/Pul-GEO films was further proven by TGA curves. The CMCS/Pul-8 %GEO film showed effective preservations on mango fruits during 15 days of storage at 25 ± 1 °C, based on the characterization by fruits weight loss, firmness, titratable acidity, soluble solids. Consequently, CMCS/Pul-GEO blend films may be a promising eco-friendly packaging material for the industrial application of fruit preservation.
本研究旨在通过浇铸法制备一种基于羧甲基壳聚糖（CMCS）和普鲁兰（Pul）的姜精油（GEO）活性可食膜。并对其物理性质、结构和对芒果的保鲜效果进行了表征。通过对共混膜物理性能、力学性能和阻隔性能的优化，确定 CMCS/Pul 的比例为 2.5:2.5。FT-IR 和 XRD 的结果表明，Pul 的羟基与 CMCS 的羧基相互作用，共混膜具有良好的相容性。TGA 曲线进一步证明了 CMCS/Pul-GEO 膜具有良好的热稳定性。CMCS/Pul-8%GEO 膜在 25±1°C 下贮藏 15 天对芒果果实具有有效保鲜作用，通过果实失重率、硬度、可滴定酸度、可溶性固形物进行评价。因此，CMCS/Pul-GEO 共混膜可能是一种有前途的环保型包装材料，可应用于水果保鲜工业。
