State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, 510640, China.
State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, 510640, China.
Carbohydr Polym. 2019 Nov 15;224:115147. doi: 10.1016/j.carbpol.2019.115147. Epub 2019 Jul 30.
Here, we designed a self-healing composite hydrogel with antioxidant and antibacterial activities by using cellulose nanofibrils (CNF) and tannic acid (TA) as functional additives. Excellent mechanical stability, moldability, stretchability and rapid self-healing ability without any external intervention were realized in one system due to the combined dynamic borate ester bonding between polyvinyl alcohol-borax (PB) and multi-hydrogen bonding between different components. The rheological measurements indicated the incorporation of CNF and TA to PB system substantially affected the viscoelasticity of hydrogels. The unique antioxidant and antibacterial properties were achieved due to the complexation of TA. These high performance multifunctional hydrogels opens a window for a broad application in the field of smart devices and surface engineering.
在这里，我们设计了一种具有抗氧化和抗菌活性的自修复复合水凝胶，方法是将纤维素纳米纤维（CNF）和单宁酸（TA）用作功能添加剂。由于聚乙烯醇-硼砂（PB）之间的动态硼酸酯键和不同成分之间的多氢键的结合，在一个系统中实现了优异的机械稳定性、可模塑性、拉伸性和无需任何外部干预的快速自修复能力。流变学测量表明，CNF 和 TA 的加入对水凝胶的粘弹性有很大影响。由于 TA 的络合作用，实现了独特的抗氧化和抗菌性能。这些高性能多功能水凝胶为智能设备和表面工程领域的广泛应用开辟了一扇窗。
