Xiong Yangkai, Fang Zhiqiang, Hu Daxiong, Jiang Hao, Huang Lei, Mao Qitong, Wang Guoqing, Li Jipeng, Liu Zhenzhong, Ma Chunxin
State Key Laboratory of Marine Resource Utilization in South China Sea, School of Materials Science and Engineering, Hainan University, Haikou 570228, China.
Taizhou Key Laboratory of Medical Devices and Advanced Materials, Research Institute of Zhejiang University─Taizhou, Taizhou 318000, China.
ACS Appl Mater Interfaces. 2023 Aug 16;15(32):38795-38807. doi: 10.1021/acsami.3c06741. Epub 2023 Aug 8.
Although many antibiofouling materials have been developed based on either bacterial-killing or antiadhesion effects, the integration of both the effects in one material remains challenging for achieving highly enhanced synergistic antibiofouling. In this study, we have explored a nano-CeO-loaded double-network hydrogel by introducing CeO nanorods into a polyzwitterionic hydrogel via a simple one-pot method for achieving highly efficient antifouling. First, the CeO nanorods dispersed in the hydrogel, as an outstanding nanozyme, have highly efficient bacterial-killing performance. Second, the superhydrophilic polyzwitterionic hydrogel provides a dense hydrated layer on the surface and subsequently excellent broad-spectrum antiadhesion behavior. Most importantly, the bacterial killing and antiadhesion of this hydrogel can work synergistically to largely improve the marine-antifouling performance. Moreover, the double-network structure of this hydrogel, including the covalently cross-linked polyzwitterion hard network and the physically cross-linked poly(vinyl alcohol) soft network, can provide greatly improved mechanical properties (2.44 MPa of tensile strength reaches and 21.87 MPa of compressive strength). As a result, among the existing marine-antifouling hydrogels, the CeO-loaded polyzwitterionic double-network hydrogel can achieve outstanding antifouling performance, which can sustain for over 6 months in a real marine environment. This work provides a promising marine-antifouling hydrogel, which will also inspire antifouling research of a new strategy and materials.
尽管已经基于杀菌或抗粘附作用开发了许多抗生物污损材料，但将这两种作用整合到一种材料中对于实现高度增强的协同抗生物污损仍然具有挑战性。在本研究中，我们通过一种简单的一锅法将CeO纳米棒引入聚两性离子水凝胶中，探索了一种负载纳米CeO的双网络水凝胶，以实现高效防污。首先，分散在水凝胶中的CeO纳米棒作为一种出色的纳米酶，具有高效的杀菌性能。其次，超亲水聚两性离子水凝胶在表面提供了一层致密的水合层，随后具有出色的广谱抗粘附行为。最重要的是，这种水凝胶的杀菌和抗粘附作用可以协同发挥作用，大大提高海洋防污性能。此外，这种水凝胶的双网络结构，包括共价交联的聚两性离子硬网络和物理交联的聚乙烯醇软网络，可以提供大大改善的机械性能（拉伸强度达到2.44MPa，抗压强度达到21.87MPa）。因此，在现有的海洋防污水凝胶中，负载CeO的聚两性离子双网络水凝胶可以实现出色的防污性能，在真实海洋环境中可持续超过6个月。这项工作提供了一种有前景的海洋防污水凝胶，也将激发新策略和材料的防污研究。
