LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal.
LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal; ENSCM - Ecole Nationale Supérieure de Chimie de Montpellier, 8 Rue de l'Ecole Normale, 34296, Montpellier cedex 5, France.
Micron. 2022 Jan;152:103164. doi: 10.1016/j.micron.2021.103164. Epub 2021 Oct 21.
Electrohydrodynamic techniques have been focus for the development of structures for encapsulation purposes. Their physico-chemical characteristics confer them significant benefits for food and nutraceutical applications. The study reports the optimization of zein microstructures (electrosprayed beads/electrospun fibers/films). The effect of zein polymer properties (viscosity and conductivity), flow rate, applied voltage and distance tip-collector were investigated. Results by scanning electron microscopy revealed the morphology observed with zein. The importance of chain entanglement for fibers/beads/films formation in the optimum conditions system was evaluated. Compact electrosprayed microbeads with diameters ranging from 0.9 μm to 2.0 μm were obtained for 5 wt.% zein solution. For 30 wt.% zein, uniform smooth electrospun fibers with diameters of approximately 0.60 to 0.75 μm were produced. Films with different characteristics (with more or less homogeneous matrix and more or less bubbles) were also obtained. The developed zein microstructures are potential vectors that might encapsulate bioactive ingredients for functional food, nutraceutical and medical applications.
电动力学技术一直是封装结构开发的重点。它们的物理化学特性为食品和营养保健品应用带来了显著的好处。本研究报告了玉米醇溶蛋白微结构（电喷珠/电纺纤维/薄膜）的优化。研究了玉米醇溶蛋白聚合物性质（粘度和电导率）、流速、施加电压和针尖-收集器距离对其的影响。扫描电子显微镜的结果显示了玉米醇溶蛋白的形态。评估了在最佳条件体系下，链缠结对纤维/珠/膜形成的重要性。对于 5wt%的玉米醇溶蛋白溶液，可得到直径在 0.9μm 至 2.0μm 之间的紧凑电喷微珠。对于 30wt%的玉米醇溶蛋白，可生产出均匀光滑的电纺纤维，直径约为 0.60 至 0.75μm。还得到了具有不同特性的薄膜（具有或多或少均匀的基质和或多或少的气泡）。所开发的玉米醇溶蛋白微结构是潜在的载体，可用于功能性食品、营养保健品和医疗应用的生物活性成分的包封。
