In this paper, acrylamide is used as a hydrophilic monomer, and octadecyl methacrylate (C18) and polyurethane (PU) monomers are used as hydrophobic monomers. In an aqueous solution containing mixed surfactants of cetyl trimethylammonium bromide and sodium dodecyl sulfate, a series of composite physical hydrogels with dual network structures are synthesized using these three monomers through in situ micelle copolymerization. The results indicate that, with the increase in PU content (<0.08 g), the thermal stability and mechanical properties (stretching and compressive) of the composite gel are enhanced, while the swelling performance becomes poorer. Furthermore, it can heal at room temperature and the self‐healing property approaches 88% of that of the original sample after 60 min. Additionally, the self‐healing efficiency shows a downward trend with the increase in the amount of PU, which is mainly related to the recovery efficiency of the network chain (polyacrylamide (PAAM) chain and PU chain) and the decrease in the mobility of C18. By constructing the double‐crosslinked network, the design and preparation of polymer hydrogels with high stretching capability, good elasticity and self‐healing performance provides a new approach to preparing hydrogels with excellent properties.

中文翻译：

---

基于氢键和疏水作用的新型双网络自修复水凝胶

在本文中，丙烯酰胺用作亲水性单体，甲基丙烯酸十八烷基酯（C18）和聚氨酯（PU）单体用作疏水性单体。在含有十六烷基三甲基溴化铵和十二烷基硫酸钠的混合表面活性剂的水溶液中，使用这三种单体通过原位胶束共聚合成了一系列具有双网络结构的复合物理水凝胶。结果表明，随着PU含量（<0.08 g）的增加，复合凝胶的热稳定性和机械性能（拉伸和压缩）增强，而溶胀性能变差。此外，它可以在室温下愈合，并且60分钟后的自愈性能接近原始样品的88％。此外，随着PU含量的增加，自愈效率呈下降趋势，这主要与网络链（聚丙烯酰胺（PAAM）链和PU链）的回收效率以及C18的迁移率降低有关。通过构建双交联网络，具有高拉伸能力，良好的弹性和自修复性能的聚合物水凝胶的设计和制备为制备具有优异性能的水凝胶提供了一种新方法。