Natural fiber-based foams demonstrate outstanding potential for energy-efficient building and personal protective equipment applications due to their lightweight, high porosity, and sustainability. However, the weak interfacial interaction among fibers, functional additives, and the matrix hampers effective stress dissipation, largely affecting the material performance. Herein, this paper demonstrates a facile strategy for fabricating high-performance collagen fiber-based foams by constructing efficient energy dissipation networks using tannin-modified leather collagen fibers (T-LCF) and waterborne polyurethane (WPU). Tannin acts as a coupling bridge, linking the fiber and polyurethane to create a hydrogen-bonded network, enhancing energy dissipation and imparting excellent mechanical properties. Compared to WPU foam (WPUF), the T-LCF-based foam (WPUF/T-LCF) showed 65%, 34 times, and 35% improvements in tensile strength, compressive strength, and ultimate oxygen index, respectively. This study provides new insights into the cleaner production of high-performance natural fiber-based foam composites and a new way for the high-value utilization of collagen solid waste.

中文翻译：

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通过构建能量耗散网络可规模化制造具有增强韧性和隔热性的胶原纤维-水性聚氨酯泡沫

天然纤维泡沫由于其轻质、高孔隙率和可持续性，在节能建筑和个人防护设备应用中表现出巨大的潜力。然而，纤维、功能添加剂和基体之间的弱界面相互作用阻碍了有效的应力消散，很大程度上影响了材料的性能。本文展示了一种通过使用单宁改性皮革胶原纤维（T-LCF）和水性聚氨酯（WPU）构建高效能量耗散网络来制造高性能胶原纤维泡沫的简便策略。单宁充当耦合桥，连接纤维和聚氨酯以形成氢键网络，增强能量耗散并赋予优异的机械性能。与 WPU 泡沫 (WPUF) 相比，T-LCF 泡沫 (WPUF/T-LCF) 的拉伸强度、压缩强度和极限氧指数分别提高了 65%、34 倍和 35%。该研究为高性能天然纤维基泡沫复合材料的清洁生产提供了新的见解，也为胶原蛋白固废的高值化利用提供了新途径。