The development of robust and bioinspired adhesives with excellent performances including fast gel time, low cost, good adhesion strength and stability, and excellent solvent and temperature resistance against harsh environment is urgent for practical applications. In this paper, kinds of natural polyphenolic adhesives have been successfully fabricated the multiple polyphenol-diisocyanate cross-linking (PDC) reactions between natural polyphenols (extracts) and diisocyanate molecules. Under heating, as-prepared adhesives could effectively adhere onto a wide range of substrates (i.e. PTFE, PET, PMMA, Al, Cu, paper, glass, wood) through hierarchical interactions. Moreover, these adhesives exhibited great adhesion stability against complex solvents and low-temperature environments, whose adhesion strength could remain unchanged after soaking solvents after 30 days, which was conducive to their potential applications in industry and chemical fields, including petroleum, wood, metal, glass, plastics, and rubber adhesion. We believed that this work would provide new strategies towards the preparation of robust adhesives with excellent resistant against various solvents and low temperature for many fields by using naturally occurring building blocks.

中文翻译：

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耐溶剂、耐低温天然多酚粘合剂

实际应用迫切需要开发具有优异性能的坚固仿生粘合剂，包括快速凝胶时间、低成本、良好的粘合强度和稳定性以及针对恶劣环境的优异耐溶剂性和耐温性。本文通过天然多酚（提取物）与二异氰酸酯分子之间的多重多酚-二异氰酸酯交联（PDC）反应成功制备了多种天然多酚粘合剂。在加热下，所制备的粘合剂可以通过分层相互作用有效地粘附到各种基材（即PTFE、PET、PMMA、Al、Cu、纸张、玻璃、木材）上。此外，这些粘合剂对复杂溶剂和低温环境表现出良好的粘合稳定性，在溶剂浸泡30天后粘合强度仍保持不变，这有利于它们在工业和化学领域的潜在应用，包括石油、木材、金属、玻璃、塑料和橡胶的粘合。我们相信，这项工作将为通过使用天然存在的构建单元制备具有优异的耐各种溶剂和低温性能的坚固粘合剂提供新的策略，用于许多领域。