干燥条件对魔芋葡甘聚糖基乳液膜成膜过程、膜结构与膜性能的影响
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湖北工业大学生命科学与健康工程学院,湖北 武汉 430068

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姜发堂(1964—),男,湖北工业大学教授,博士。E-mail: jiangft@mail.hbut.edu.cn

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国家自然科学基金面上项目(编号:31972156)


Effects of drying conditions on the forming process, structure, and properties of konjac glucomannan-based emulsion films
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School of Life and Health Sciences, Hubei University of Technology, Wuhan, Hubei 430068, China

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    摘要:

    目的 探究由干燥诱导的油脂分布状态对魔芋葡甘聚糖基乳液膜结构与理化性质的影响机制。方法 构建魔芋葡甘聚糖—果胶—罗勒精油成膜乳液(K-P-OG),探究了不同干燥温度(25,30,35,40 ℃)对K-P-OG膜理化性能的影响,并通过激光扫描共聚焦显微镜(CLSM)、扫描电子显微镜(SEM)、核磁共振成像分析仪(LF-NMR),追踪了乳液膜干燥成膜过程中液滴状态和水分分布,并用流变仪分析了成膜过程中乳液膜各组分间的相互作用。结果 干燥温度为30 ℃时,罗勒精油(OG)在成膜液中均匀分散,稳定性最高,膜结构最为致密有序,理化性能最优,其拉伸强度为84.8 MPa,断裂伸长率为12.9%,水接触角为97°。随着干燥时间的延长,紧密结合水和轻度结合水之间相互渗透,成膜乳液中大分子链间的纠缠程度和氢键作用增强。结论 适宜的干燥条件有助于维持成膜乳液在成膜过程中的稳定,促进膜基质的相互作用,形成均匀致密的膜结构,显著提高乳液膜的力学和阻隔性能。

    Abstract:

    Objective To investigate the mechanism by which lipid distribution induced by drying conditions affects the structure and physicochemical properties of konjac glucomannan-based emulsion films.Methods A film-forming emulsion composed of konjac glucomannan, pectin, and basil essential oil (K-P-OG) was prepared. The effects of different drying temperatures (25 ℃, 30 ℃, 35 ℃, and 40 ℃) on the physicochemical properties of K-P-OG films were examined. The droplet morphology and water distribution during the film-forming process were tracked using confocal laser scanning microscopy (CLSM), scanning electron microscopy (SEM), and low-field nuclear magnetic resonance (LF-NMR). A rheometer was used to analyze the interactions among components within the emulsion during film formation.Results At a drying temperature of 30 ℃, OG was uniformly dispersed in the film-forming solution, resulting in the highest stability, the most compact and orderly film structure, and optimal physicochemical properties. The tensile strength and elongation at break reached 84.8 MPa and 12.9%, respectively, and the water contact angle was 97°. As drying progressed, tightly bound water and loosely bound water interpenetrated, and the degree of molecular chain entanglement and hydrogen bonding in the film-forming emulsion increased.Conclusion Appropriate drying conditions help maintain the stability of the emulsion during film formation, promote interactions within the film matrix, facilitate the formation of a uniform and dense film structure, and significantly enhance the mechanical and barrier properties of the emulsion film.

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刘毅,朱晶玉,程宇航,等.干燥条件对魔芋葡甘聚糖基乳液膜成膜过程、膜结构与膜性能的影响[J].食品与机械,2025,41(7):248-256.
LIU Yi, ZHU Jingyu, CHENG Yuhang, et al. Effects of drying conditions on the forming process, structure, and properties of konjac glucomannan-based emulsion films[J]. Food & Machinery,2025,41(7):248-256.

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  • 收稿日期:2024-07-17
  • 最后修改日期:2025-04-07
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  • 在线发布日期: 2025-07-12
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