National "111" Center for Cellular Regulation and Molecular Pharmaceutics, Key Laboratory of Fermentation Engineering (Ministry of Education), Hubei University of Technology, Wuhan 430068, China; Cooperative Innovation Center of Industrial Fermentation (Ministry of Education & Hubei Province), School of Food and Biological Engineering, Hubei University of Technology, Wuhan 430068, China.
Yellow Crane Tower Science and Technology Park (Group) Co., Ltd., Wuhan 430040, Hubei, China.
Int J Biol Macromol. 2023 Jun 30;241:124629. doi: 10.1016/j.ijbiomac.2023.124629. Epub 2023 Apr 27.
Hydrophilic konjac glucomannan (KGM)/hydrophobic ethyl cellulose (EC) film was prepared in the ethanol/water environment. The film-forming solution and film properties were both characterized to analyze the molecular interaction changes. Although higher ethanol usage enhanced the stability of the film-forming solution, it did not benefit the film property improvement. The SEM images showed some fibrous structure on the air surface of the films, consistent with the XRD results. The changing trend of mechanical properties and the FTIR results suggested that both ethanol content and ethanol evaporation impacted the molecular interaction during the film formation. The surface hydrophobicity results indicated that the ethanol content could cause significant EC aggregation changes on the film surface only with high EC contents. The water vapor permeability results suggested that higher ethanol usage decreased the compactness of the films. Considering all results, the 20 % ethanol content and the weight ratio of KGM: EC = 7:3 were suggested for the film preparation due to the superior properties in most properties. This study contributed to the understanding of polysaccharide interaction in the ethanol/water environment and offered an alternative biodegradable packaging film.
在乙醇/水环境中制备了亲水性魔芋葡甘聚糖（KGM）/疏水性乙基纤维素（EC）薄膜。对成膜溶液和薄膜性能进行了表征，以分析分子相互作用的变化。尽管较高的乙醇用量提高了成膜溶液的稳定性，但对改善薄膜性能没有益处。SEM 图像显示薄膜空气表面存在一些纤维结构，与 XRD 结果一致。机械性能的变化趋势和 FTIR 结果表明，乙醇含量和乙醇蒸发在成膜过程中都会影响分子相互作用。表面疏水性结果表明，只有在高 EC 含量下，乙醇含量才会导致薄膜表面 EC 显著聚集变化。水蒸气透过率结果表明，较高的乙醇用量会降低薄膜的致密性。综合所有结果，由于在大多数性能方面都具有优异的性能，建议在 20%乙醇含量和 KGM:EC=7:3 的重量比下制备薄膜。该研究有助于理解多糖在乙醇/水环境中的相互作用，并提供了一种可替代的生物降解包装薄膜。
