Abstract Alginates are natural unbranched polysaccharide and have been extensively investigated because of their biocompatibility and superior gel-forming properties. However, the tribology functions of alginate hydrogels still remain largely unexplored. Here, we develop a facile method for reducing friction and wear between polymer-metal friction pairs. The using of gluconic acid-δ-lactone (GDL) is important to regulate gelation time and induce complete, uniform gelation of alginates by in situ release Ca2+. After the addition of graphene, the friction coefficient and wear volume decline with ratios of 37 % and 50 %, respectively. The effective isolation of friction pairs and the release of water molecule owning to the self-decomposition of alginate hydrogels together contribute to reduce friction and wear.

中文翻译：

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石墨烯增强和原位形成的藻酸盐水凝胶用于减少聚合物的摩擦和磨损

摘要 海藻酸盐是一种天然的无支链多糖，因其生物相容性和优异的凝胶形成特性而受到广泛研究。然而，海藻酸盐水凝胶的摩擦学功能在很大程度上仍未得到探索。在这里，我们开发了一种简便的方法来减少聚合物-金属摩擦副之间的摩擦和磨损。葡萄糖酸-δ-内酯 (GDL) 的使用对于调节胶凝时间和通过原位释放 Ca2+ 诱导藻酸盐完全、均匀的胶凝很重要。添加石墨烯后，摩擦系数和磨损量分别以 37% 和 50% 的比例下降。由于藻酸盐水凝胶的自分解，摩擦副的有效隔离和水分子的释放共同有助于减少摩擦和磨损。