Harvesting sustainable biobased elastomers with both high strength and high toughness holds great promise for various applications. However, the inherent conflicts between these properties make it challenging to achieve a simultaneous balance. Here, inspired by the structure of spider silk, we have synthesized a multiphase polymer (PA-BP_x) containing oxalamides derived from biomass. The introduction of a benzene ring structure, combined with the double hydrogen bonds of oxalamide, results in smaller and more uniformly distributed hard domains, concurrently enhancing the molecular chain rigidity. The molecular structure described facilitates energy dissipation through the destruction and reformation of hard domains, achieving a remarkable balance between superior mechanical robustness and toughness. The PA-BP₄₀ elastomer demonstrates exceptional advantages in both tensile strength and toughness compared to other reported biobased and filled biobased elastomers, with a toughness of 230 MJ·m^–3 and maintaining a high tensile strength of 46.6 MPa. These remarkable mechanical properties make the PA-BP₄₀ elastomer a promising material for various applications where both high strength and toughness are required. Moreover, the elastomers exhibit strong fluorescence even in the absence of conventional chromophores, highlighting their potential for fluorescent anticounterfeiting applications. Overall, this study presents a promising strategy for developing sustainable elastomers with desirable performance characteristics, thus contributing to the advancement of biobased materials in various applications.

中文翻译：

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兼具高强度和高韧性的高性能生物基弹性体

收获具有高强度和高韧性的可持续生物基弹性体为各种应用带来了巨大的前景。然而，这些属性之间固有的冲突使得实现同时平衡具有挑战性。在这里，受蜘蛛丝结构的启发，我们合成了一种含有源自生物质的草酰胺的多相聚合物（PA-BP _x ）。苯环结构的引入，与草酰胺双氢键结合，产生更小且分布更均匀的硬域，同时增强了分子链刚性。所描述的分子结构通过硬域的破坏和重组促进能量耗散，从而在优异的机械鲁棒性和韧性之间实现显着的平衡。与其他报道的生物基和填充生物基弹性体相比，PA-BP _{40弹性体在拉伸强度和韧性方面表现出卓越的优势，其韧性为 230 MJ·m} ^–3并保持 46.6 MPa 的高拉伸强度。这些卓越的机械性能使 PA-BP ₄₀弹性体成为一种有前景的材料，适用于需要高强度和韧性的各种应用。此外，即使在没有传统发色团的情况下，弹性体也表现出强烈的荧光，凸显了它们在荧光防伪应用中的潜力。总体而言，这项研究提出了一种开发具有理想性能特征的可持续弹性体的有前途的策略，从而有助于生物基材料在各种应用中的进步。