The development of self-healing materials with the ability to repair damage has received considerable attention. The challenge of the weak mechanical properties of host–guest (HG)-based self-healable hydrogels was largely solved by employing the β-cyclodextrin dimer (bis-CD) as a novel host cross-linker and the addition of ZnO nanoparticles (NPs). First, bis-CD, adamantane-modified alginate (ALG–Ad) and βCD-modified alginate (ALG–CD) were synthesized as the host cross-linker, guest polymer and host polymer, respectively. Then, three self-healable hydrogels, ALG–Ad/ALG–CD, ALG–Ad/bis-CD and ALG–Ad/bis-CD/ZnO, were fabricated based on HG complexation and their mechanical properties were compared with each other. According to the results, employing bis-CD instead of ALG–Ad increased the mechanical strength of the ALG–Ad/bis-CD hydrogel to 2490 Pa. The influence of the ZnO NPs on the mechanical strength of the ALG–Ad/bis-CD/ZnO nanocomposite hydrogel was also investigated by rheological measurements and the modulus was increased to 31 800 Pa by employing ZnO NPs. The ALG–Ad/bis-CD/ZnO hydrogel showed antibacterial properties due to the presence of ZnO NPs. Moreover, this nanocomposite hydrogel showed rapid self-healing behavior in less than 5 seconds, which was examined microscopically and macroscopically. The self-healing, biocompatibility and antibacterial properties of the prepared nanocomposite make it a good candidate for fabricating coatings.

中文翻译：

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使用氧化锌/β-环糊精二聚体/改性海藻酸盐制备具有自修复性能的抗菌水凝胶纳米复合材料

具有修复损伤能力的自修复材料的开发受到了相当多的关注。通过采用 β-环糊精二聚体 (bis-CD) 作为新型主体交联剂和添加 ZnO 纳米粒子 (NPs ）。首先，分别合成了双-CD、金刚烷改性海藻酸盐（ALG-Ad）和βCD改性海藻酸盐（ALG-CD）作为主体交联剂、客体聚合物和主体聚合物。然后，基于 HG 络合制备了三种自修复水凝胶 ALG-Ad/ALG-CD、ALG-Ad/bis-CD 和 ALG-Ad/bis-CD/ZnO，并比较了它们的机械性能。根据结果​​，使用 bis-CD 代替 ALG-Ad 将 ALG-Ad/bis-CD 水凝胶的机械强度提高到 2490 Pa。还通过流变学测量研究了 ZnO NPs 对 ALG-Ad/bis-CD/ZnO 纳米复合水凝胶机械强度的影响，并通过使用 ZnO NPs 将模量增加到 31 800 Pa。由于 ZnO NPs 的存在，ALG-Ad/bis-CD/ZnO 水凝胶显示出抗菌性能。此外，这种纳米复合水凝胶在不到 5 秒的时间内显示出快速的自愈行为，这在微观和宏观上进行了检查。制备的纳米复合材料的自修复、生物相容性和抗菌性能使其成为制备涂层的良好候选者。由于 ZnO NPs 的存在，ALG-Ad/bis-CD/ZnO 水凝胶显示出抗菌性能。此外，这种纳米复合水凝胶在不到 5 秒的时间内显示出快速的自愈行为，从微观和宏观上进行了检查。制备的纳米复合材料的自修复、生物相容性和抗菌性能使其成为制备涂层的良好候选者。由于 ZnO NPs 的存在，ALG-Ad/bis-CD/ZnO 水凝胶显示出抗菌性能。此外，这种纳米复合水凝胶在不到 5 秒的时间内显示出快速的自愈行为，从微观和宏观上进行了检查。制备的纳米复合材料的自修复、生物相容性和抗菌性能使其成为制备涂层的良好候选者。