Abstract：
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-CeO2-loaded double-network hydrogel by introducing CeO2 nanorods into a polyzwitterionic hydrogel via a simple one-pot method for achieving highly efficient antifouling. First, the CeO2 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 CeO2-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.
摘要：
尽管已经开发了许多基于细菌杀灭或抗粘附作用的抗生物污染材料，两种效应在一种材料中的整合对于实现高度增强的协同抗生物污染仍然具有挑战性。在这项研究中,我们通过简单的一锅法将CeO2纳米棒引入多两性离子水凝胶中，探索了纳米CeO2负载的双网络水凝胶，以实现高效的防污。首先,分散在水凝胶中的CeO2纳米棒，作为一种杰出的纳米酶，具有高效的杀菌性能。第二,超亲水聚两性离子水凝胶在表面上提供致密的水合层,并随后提供优异的广谱抗粘附行为。最重要的是,这种水凝胶的细菌杀灭和抗粘附性可以协同作用，大大改善海洋防污性能。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，可以提供大大提高的机械性能（2.44MPa的拉伸强度和21.87MPa的压缩强度）。因此,在现有的海洋防污水凝胶中，负载CeO2的聚两性离子双网络水凝胶具有优异的防污性能,在真实的海洋环境中可以维持超过6个月。这项工作提供了一种有前途的海洋防污水凝胶，这也将激发新的策略和材料的防污研究。
