Uniformity optimization in intermittent microwave-hot air drying of lotus root via dielectric characterization: Microstructural quality perspective

文献类型： 外文期刊

第一作者： Yu, Yiyang

作者： Yu, Yiyang;Wang, Shuai;Song, Hualu;Yu, Yiyang;Su, Dianbin;Xu, Huihui;Chen, Jia;Lv, Weiqiao

作者机构：

关键词： Dielectric properties; Heating uniformity; Intermittent drying; Microwave

期刊名称：FOOD CONTROL （ 影响因子：6.3； 五年影响因子：6.1 ）

ISSN： 0956-7135

年卷期： 2026 年 179 卷

页码：

收录情况： SCI

摘要： This study investigates the application of intermittent drying in lotus root sample (LS) processing using a microwave-infrared-hot air rolling bed dryer by adjusting the cycle ratio and microwave field intensity. The drying path, moisture migration, microstructure, and physicochemical properties of LS under drying processing were examined. Thermal imaging, dielectric properties, and pore distribution were analyzed in independent LS from both edge and center regions. Results indicate that microwaves play a key role in establishing the primary drying path, while non-uniform thermal distribution is mainly attributed to the dielectric differences within the LS and edge effects of hot air circulation. Morphological analysis of the microstructure further revealed the energy distribution between intermittent microwave and hot air drying. The intermittent drying process reduced drying time by up to 76.1 %, minimized regional equivalent diameter variation to 2.1 %, and achieved a uniformity coefficient of < |1|. Additionally, drying processing induced bioactive compound release and structural changes in the cell wall, leading to improved phenolic retention, vitamin stability, and antioxidant activity.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序