Constructing hybrid double network (DN) hydrogels has become an important strategy to prepare strong and tough hydrogels with good self-healing properties for durable usage. However, the recoverable and self-healing efficiencies of DN hydrogels are usually low. We develop a type of hybrid DN hydrogel, which contain the starch network for generating strong dynamic interactions within the gel matrix. The composite gels show tensile strength over 200 kPa with the elastic modulus of ∼29.7 kPa. Gelatinization of cassava starch is a key procedure that can significantly raise mechanical strengths. The healing efficiency of the composite gel gradually increased to as high as 99% after 24 h at room temperature. This work shows that dynamic physical bonding in hydrogels can be greatly enhanced by a simple starch reinforcing tactic. The combination of naturally abundant starch with hydrophilic polymers provides a general approach to design functional soft materials for applications in various fields.

制备混合双网络（DN）水凝胶已成为制备具有良好自我修复性能的耐用水凝胶的重要策略。但是，DN水凝胶的可恢复性和自我修复效率通常很低。我们开发了一种混合型DN水凝胶，其中包含淀粉网络，可在凝胶基质内产生强大的动态相互作用。复合凝胶的拉伸强度超过200 kPa，弹性模量约为29.7 kPa。木薯淀粉的糊化是可以显着提高机械强度的关键过程。在室温下24小时后，复合凝胶的愈合效率逐渐提高至高达99％。这项工作表明，通过简单的淀粉增强策略可以大大增强水凝胶中的动态物理键合。