Jiang Guangyang, He Kaiwen, Chen Mingrui, Yang Yichen, Tang Tingting, Tian Yongqiang
College of Biomass Science and Engineering, Sichuan University, Chengdu, China; Key Laboratory of Leather Chemistry and Engineering, Sichuan University, Ministry of Education, Chengdu, China.
College of Food Science, Sichuan Agricultural University, Yaan, China.
Carbohydr Polym. 2025 Jan 1;347:122701. doi: 10.1016/j.carbpol.2024.122701. Epub 2024 Sep 4.
To improve the limited mechanical and water barrier properties of chitosan film while granting extra functionalities simultaneously, present study pioneered the incorporation of chitosan film with newly developed essential oil (EO)-based hydrophobic deep eutectic solvents (HDES, EO:octanoic acid (OA), EO:menthol (ME) and OA:ME:EO). The highest tensile strength (66.22 MPa) and elongation at break (45.99 %) were obtained in OA:ME:EO-40 and OA:ME:EO-80 films, respectively. The OA:EO-based films showed excellent and stable hydrophobicity. HDESs also endowed film with additional functionalities including thermal stability, bio-compatibility, controlled release, antioxidant, and antibacterial capacity. The extension of the storage period of strawberry treated with OA:EO-containing films confirmed their preservation ability. Compared with ME:EO and OA:ME:EO, OA:EO had better compatibility with chitosan matrix and could serve as a promising plasticizer for strengthening functionalities of chitosan film. These results also promote application of HDESs as emerging plasticizers in manufacture of other polymer-based packaging film.
为了改善壳聚糖薄膜有限的机械性能和阻水性能，同时赋予其额外的功能，本研究率先将壳聚糖薄膜与新开发的基于精油（EO）的疏水性低共熔溶剂（HDES，EO：辛酸（OA）、EO：薄荷醇（ME）以及OA：ME：EO）相结合。分别在OA：ME：EO - 40和OA：ME：EO - 80薄膜中获得了最高拉伸强度（66.22MPa）和断裂伸长率（45.99%）。基于OA：EO的薄膜表现出优异且稳定的疏水性。HDES还赋予薄膜额外的功能，包括热稳定性、生物相容性、控释性、抗氧化性和抗菌能力。用含OA：EO的薄膜处理草莓可延长其储存期，证实了它们的保鲜能力。与ME：EO和OA：ME：EO相比，OA：EO与壳聚糖基质具有更好的相容性，并且可以作为一种有前景的增塑剂来增强壳聚糖薄膜的功能。这些结果也促进了HDES作为新型增塑剂在其他聚合物基包装薄膜制造中的应用。
