Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Drive, NW, Calgary, AB, T2N 1N4, Canada.
Biomedical Engineering, University of Calgary, 2500 University Drive, NW, Calgary, AB, T2N 1N4, Canada.
Small. 2021 Dec;17(49):e2103521. doi: 10.1002/smll.202103521. Epub 2021 Oct 16.
The ultrastretchable (over 12 400%) hydrogel with long-lasting adhesion, strong antibacterial activity, and robust spinnability is developed based on the oxidative decarboxylation and quinone-catechol reversible redox reaction induced by Ag-lignin nanoparticles in a precursor solution containing citric acid (CA), acrylic acid (AA), and poly (acrylamide-co-acrylic acid) (P(AAm-co-AA)). With massive reversible interactions including hydrogen bonds and electrostatic forces, such hydrogel exhibits promising injectability and is facilely spun via manual drawing, draw-spinning, and electrospinning for manufacturing strong hydrogel micro/nanofibers. The resulting fibers exhibit excellent mechanical properties, including tensile stress of 422.0 MPa, strain of 86.5%, Young's modulus of 8.7 GPa, and toughness of 281.6 MJ m . The hydrogel microfibers obtained from a house-built spinner are scaled-up fabricated while retaining promising mechanical properties, as evidenced by lifting a load (317.2 g) using the spun fibers of ≈33 000 times lighter weight (9.5 mg), indicating their great potentials in the applications such as net and safety cord which require robust mechanical properties. Moreover, assisted by a commercial electrospinning machine, nanosized hydrogel fibers are facilely spun on personal protective equipment such as a mask to offer an antiseptic coating with near 100% killing efficiency against airborne bacteria aerosols, demonstrating the capability of spun hydrogel fibers on disinfection-related applications.
基于氧化脱羧和醌-邻苯二酚可逆氧化还原反应，在含有柠檬酸（CA）、丙烯酸（AA）和聚（丙烯酰胺-co-丙烯酸）（P（AAm-co-AA））的前驱体溶液中制备出超拉伸（超过 12400%）、具有持久附着力、强抗菌活性和强可纺性的水凝胶。这种水凝胶具有大量的可逆相互作用，包括氢键和静电力，具有良好的可注射性，并且可以通过手动拉伸、拉伸纺丝和静电纺丝轻松纺丝，用于制造强水凝胶微/纳米纤维。所得到的纤维具有出色的机械性能，包括拉伸应力为 422.0 MPa、应变 86.5%、杨氏模量为 8.7 GPa 和韧性为 281.6 MJ m 。通过使用约 33000 倍轻重量（9.5 mg）的纺制纤维提起负载（317.2 g），证明了从自制纺丝机获得的水凝胶微纤维在保留有前途的机械性能的情况下进行了放大制造，表明其在需要强机械性能的网和安全绳等应用中的巨大潜力。此外，借助商业静电纺丝机，纳米水凝胶纤维可以轻松地纺制在个人防护设备（如口罩）上，提供具有近 100%杀灭效率的抗菌涂层，展示了纺制水凝胶纤维在消毒相关应用中的能力。
