Mileti Olga, Baldino Noemi, Marchio Vittoria, Lupi Francesca R, Gabriele Domenico
Department of Information, Modeling, Electronics and System Engineering (D.I.M.E.S.), University of Calabria, Via P. Bucci, Cubo 39C, I-87036 Rende, Italy.
Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Via Pietro Bucci, I-87036 Rende, Italy.
Gels. 2024 Oct 23;10(11):681. doi: 10.3390/gels10110681.
The recovery of potato waste for circular-economy purposes is a growing area of industrial research. This waste, rich in nutrients and potential for reuse, can be a valuable source of starch for packaging applications. Rheology plays a crucial role in characterizing film-forming solutions before casting. In this work, packaging film was prepared from potato waste using rheological information to formulate the film-forming solution. To this aim, rheological measurements were carried out on starch/glycerol-only samples, and the data obtained were used to optimize the formulation from the waste. The polyphenol content of the peels was analyzed, and the resulting films were comprehensively characterized. This included assessments of color, extensibility, Fourier-transform infrared (FT-IR) spectroscopy, surface microscopy, and contact angle. Polyphenol-loaded films, suitable for packaging applications, were developed from potato waste. These films exhibited distinct properties compared to those made with pure starch, including an improved wettability of about 75° for the best sample and a high elastic modulus of about 36 MPa, which reduces the deformability but enhances the resistance against the stress. Through rheological studies, we were able to design films from potato peel waste. These films demonstrated promising mechanical performance.
为实现循环经济目的而回收马铃薯废料是工业研究中一个不断发展的领域。这种富含营养且具有再利用潜力的废料，可成为包装应用中淀粉的宝贵来源。流变学在浇铸前表征成膜溶液方面起着关键作用。在这项工作中，利用流变学信息配制了成膜溶液，由马铃薯废料制备了包装薄膜。为此，对仅含淀粉/甘油的样品进行了流变学测量，并将所得数据用于优化废料配方。分析了马铃薯皮的多酚含量，并对所得薄膜进行了全面表征。这包括颜色、拉伸性、傅里叶变换红外（FT-IR）光谱、表面显微镜和接触角的评估。从马铃薯废料中开发出了适用于包装应用的含多酚薄膜。与纯淀粉制成的薄膜相比，这些薄膜具有独特的性能，包括最佳样品的润湿性提高到约75°，以及约36 MPa的高弹性模量，这降低了可变形性，但增强了抗应力能力。通过流变学研究，我们能够用马铃薯皮废料设计薄膜。这些薄膜表现出了良好的机械性能。
