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首页> 外文期刊>ACS applied materials & interfaces >Unconventional Tough Double-Network Hydrogels with Rapid Mechanical Recovery, Self-Healing, and Self-Gluing Properties
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Unconventional Tough Double-Network Hydrogels with Rapid Mechanical Recovery, Self-Healing, and Self-Gluing Properties

机译：具有快速机械恢复，自修复和自粘合特性的非常规韧性双网络水凝胶

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摘要

Hydrogels are polymeric materials that have a relatively high capacity for holding water. Recently, a double network (DN) technique was developed to fabricate hydrogels with a toughness comparable to rubber. The mechanical properties of DN hydrogels may be attributed to the brittle sacrificial bonding network of one hydrogel, facilitating stress dispersion, combined with ductile polymer chains of a second hydrogel. Herein, we report a novel class of tunable DN hydrogels composed of a polyurethane hydrogel and a stronger, dipole-dipole and H-bonding interaction reinforced (DHIR) hydrogel. Compared to conventional DN hydrogels, these materials show remarkable improvements in mechanical recovery, modulus, and yielding, with excellent self-healing and self-gluing properties. In addition, the new DN hydrogels exhibit excellent tensile and compression strengths and possess shape-memory properties, which make them promising for applications in engineering, biomedicine, and other domains where load bearing is required.
机译：水凝胶是具有相对高的持水能力的聚合物材料。最近，开发了一种双网络（DN）技术来制造具有与橡胶相当的韧性的水凝胶。 DN水凝胶的机械性能可归因于一种水凝胶的脆性牺牲性键合网络，有利于应力分散，并结合了第二种水凝胶的可延展聚合物链。在本文中，我们报告了一类新型的可调谐DN水凝胶，该水凝胶由聚氨酯水凝胶和更强的偶极-偶极和氢键相互作用增强（DHIR）水凝胶组成。与常规的DN水凝胶相比，这些材料在机械恢复，模量和屈服方面显示出显着的改善，并具有出色的自愈和自粘性能。此外，新型DN水凝胶具有出色的拉伸和压缩强度，并具有形状记忆特性，这使其在工程，生物医学和其他需要承受负荷的领域中具有广阔的应用前景。

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