Polysaccharide-based recoverable double-network hydrogel with high strength and self-healing properties

作者：Kun Lei, Zhao Li, Dandan Zhu, Chengyuan Sun, Yunlong Sun, Chongchong Yang, Zhen Zheng, Xinling Wang · 发表于：Journal of Materials Chemistry B · 年份：2019 · DOI：10.1039/c9tb01679a · 被引用次数：64 · 研究领域：Hydrogels: synthesis, properties, applications、Supramolecular Self-Assembly in Materials、3D Printing in Biomedical Research

Polysaccharide-based hydrogels (PSBHs) have received significant attention for numerous bio-applications due to their biocompatibility and non-immunogenic performance. However, the construction of PSBH with superior mechanical properties by a simple method is rarely adequately researched. This study focuses on the construction of a novel PSBH with superior mechanical and recoverable properties by integrating the synergistic and complementary interactions of covalent bond-associated oxidized sodium alginate (SA-CHO) gel and hydrogen bond-associated agarose (Aga) gel. With the synergy and complementarity of the SA-CHO and Aga networks, the hydrogel exhibited 17 and 15 times (20 and 9 times) greater compressive stress and modulus, respectively, compared with the SA-CHO gel (Aga gel). The hydrogel also displayed excellent fatigue resistance, recurrent shapeability, acid resistance and recovery ability, as well as self-healing ability. This study provides a unique perspective for enhancing the mechanical properties of PSBH through the synergy and complementarity of different kinds of polysaccharides without sacrificing the functionality of the PSBH.