Department of Engineering Enzo Ferrari, University of Modena and Reggio Emilia, Via Pietro Vivarelli 10, Modena, Emilia-Romagna 41125, Italy.
Department of Life Sciences (Agri-Food Science Area), BIOGEST - SITEIA Interdepartmental Centre, University of Modena and Reggio Emilia, Piazzale Europa 1, Reggio Emilia, Emilia-Romagna 42124, Italy.
Waste Manag. 2021 May 1;126:538-548. doi: 10.1016/j.wasman.2021.03.050. Epub 2021 Apr 10.
Grape stalks are a lignocellulosic biomass, which is a very complex material, whose easy and profitable fractionation to obtain its basic components is still not available. Therefore, alternative ways to try and make use of grape stalks are currently being explored. In the present study, the possible use of dried and milled grape stalks as filler in bio-composites was assessed using polybutylene succinate as a basic polymer. The tensile specimens produced using 10% grape stalk powder as it is and functionalized through pre-extrusion acetylation and silylation, and silylation in situ were characterized for their structural, mechanical, thermal, morphological, and color properties. The bio-composites showed to be stiffer than the control polymer, with an increase of Young's modulus from 616 MPa to 732 MPa in the specimens obtained with acetylated grape stalk powder. This led to a potentially new method to valorize by-products of the wine industry such as grape stalks in order to recover raw materials which could prove useful in the biomaterials and bio-composites sector.
葡萄秸秆是一种木质纤维素生物质，这是一种非常复杂的材料，其易于盈利的分离以获得其基本成分目前还不可用。因此，目前正在探索替代方法来尝试利用葡萄秸秆。在本研究中，使用聚丁二酸丁二醇酯作为基本聚合物，评估了将干燥和粉碎的葡萄秸秆用作生物复合材料中的填料的可能性。通过预挤出乙酰化和硅烷化以及原位硅烷化对用 10%葡萄秸秆粉末作为填充剂和功能化的拉伸试样进行了结构、力学、热学、形态和颜色特性的表征。生物复合材料表现出比对照聚合物更硬，用乙酰化葡萄秸秆粉末获得的试样的杨氏模量从 616MPa 增加到 732MPa。这为利用葡萄酒行业的副产品（如葡萄秸秆）提供了一种有潜力的新方法，以回收在生物材料和生物复合材料领域可能有用的原材料。
