A sandwich panel based on upcycled bottle caps core and sustainable components is investigated to contribute to advances in lightweight and environmentally friendly structural solutions. Ecological alternatives to the panel skin and adhesive, such as a recycled PET-bottle foil and a castor oil bio-polyurethane, respectively, are tested and compared to commercial components (aluminium skin and epoxy polymer). Bottle caps are characterised using a small punch test specially developed to obtain the properties of the bottle caps. Additionally, low-cost reinforcement (Portland cement) is added to adhesives to enhance the mechanical behaviour of the panel. The sustainable panels achieve enhanced efficiency compared to aluminium-based panels for core shear strength and stiffness, besides having similar specific flexural properties compared to those of epoxy-based PET panels. Despite their higher strength and stiffness, epoxy polymer-based panels show visible adhesive peeling off to bottle caps core and aluminium skin. In contrast, the biopolymer exhibits larger deformation and debonding of both substrates, indicating a progressive and ductile failure. The satisfactory efficiency of sustainable panels confirms the promising reuse of recycled bottle caps in structural applications.

对基于升级后的瓶盖核心和可持续组件的夹芯板进行了研究，以促进轻质和环保结构解决方案的进步。分别测试了面板蒙皮和粘合剂的生态替代品，例如回收的PET瓶箔和蓖麻油生物聚氨酯，并将其与商业组件（铝蒙皮和环氧聚合物）进行了比较。瓶盖的特征是使用专门为获得瓶盖性能而开发的小型冲孔测试来表征的。此外，低成本的增强材料（波特兰水泥）被添加到粘合剂中，以增强面板的机械性能。与铝基面板相比，可持续面板在核心抗剪强度和刚度方面实现了更高的效率，除了具有与基于环氧的PET板相似的比弯曲性能外，还具有其他优点。尽管基于环氧聚合物的面板具有更高的强度和刚度，但仍显示出可见的粘合剂剥离到瓶盖的芯和铝皮上。相比之下，生物聚合物在两个基材上均表现出较大的变形和脱粘，表明进行性和延性破坏。可持续面板的令人满意的效率证实了可回收瓶盖在结构应用中的有希望的再利用。