Sargasso cellulose nanofibers (CNFs) and polyvinyl alcohol (PVA) components were composed to generate novel KCNF/PVA films by a simple and benign crosslinking strategy. Sargasso CNFs are a potential reinforcement material due to its extremely long length (15–20 μm) and natural nanostructure. The low water resistance of PVA limits their use in humid and watery environments. However, the chemical cross-linking between sargasso CNFs and PVA consumes a large number of hydrophilic hydroxyl groups, the resulting KCNF/PVA films exhibited outstanding water resistance (water contact angle 119°). Especially, the wet strength of KCNF/PVA films (50 MPa) was raised by 92 times when compared to that of pristine PVA films (0.54 MPa). Furthermore, these KCNF/PVA films could be dissolved and recycled easily. The regenerated films also show outstanding mechanical performance.

马尾藻纤维素纳米纤维 (CNFs) 和聚乙烯醇 (PVA) 成分通过简单而良性的交联策略合成新型 KCNF/PVA 薄膜。由于其极长的长度（15-20 μm）和天然的纳米结构，马尾藻 CNF 是一种潜在的增强材料。PVA 的低耐水性限制了它们在潮湿和多水环境中的使用。然而，马尾藻CNFs与PVA之间的化学交联消耗了大量亲水性羟基，所得KCNF/PVA薄膜表现出优异的耐水性（水接触角119°）。特别是，与原始 PVA 薄膜（0.54 MPa）相比，KCNF/PVA 薄膜的湿强度（50 MPa）提高了 92 倍。此外，这些 KCNF/PVA 薄膜可以很容易地溶解和回收。