Antifouling coatings are crucial to protect marine facilities and aquacultures from the damage of microorganisms for long-term serves. However, it is still a challenge to fabricate coating with excellent antifouling performance and superior mechanical stability. Here, we report a bio-based amphiphilic hydrogel coating with excellent antifouling and mechanical properties. The coating was achieved by the in-situ formation of hydrophobic and hydrophilic interpenetrating polymer network (IPN). The hydrophobic part from a synthesized silicon-containing epoxy resin contributes to superior mechanical properties including high tensile strength and excellent adhesion of 5B. While the hydrophilic hydrogel part from the cross-linking of a hydrophilic polymer with AgNPs gives excellent antifouling properties, resist to proteins, bacteria, algae, and other marine organisms. The antifouling performance of the coating was evaluated by the attachment of proteins (BSA-FITC), bacteria (Escherichia coli and Bacillus subtilis), and Algae (Navicula torguatum and Phaeodactylum tricornutum). The results show that the bio-based amphiphilic hydrogel coating (e.g. SA-1-5) endows surface with excellent resistance to the fouling of proteins, bacteria and microorganisms. The overall antifouling and mechanical properties of the amphiphilic coating was also evaluated by field test in East China Sea from June 3rd 2020 to July 17th 2020 that the bio-based amphiphilic hydrogel coating was intact and almost no marine organisms attached. This work provides a new strategy for the fabrication of bio-based and high-performance antifouling coatings.

防污涂料对于保护海洋设施和水产养殖业免受长期服务微生物的损害至关重要。然而，制造具有优异的防污性能和优异的机械稳定性的涂料仍然是一个挑战。在这里，我们报告了具有优异的防污和机械性能的生物基两亲水凝胶涂料。通过原位形成疏水和亲水的互穿聚合物网络（IPN）来实现涂层。合成的含硅环氧树脂的疏水部分有助于提高机械性能，包括高拉伸强度和5B优异的附着力。亲水性聚合物与AgNPs交联形成的亲水性水凝胶部分具有出色的防污性能，可抵抗蛋白质，细菌，藻类，和其他海洋生物。涂层的防污性能通过蛋白质（BSA-FITC），细菌（大肠杆菌和枯草芽孢杆菌（Bacillus subtilis），以及藻类（Navicula torguatum和Phaeodactylum tricornutum）。结果表明，基于生物的两亲性水凝胶涂层（例如SA-1-5）赋予了表面优异的抗蛋白质，细菌和微生物结垢的能力。还通过2020年6月3日至2020年7月17日在东海进行的野外试验评估了两亲涂层的整体防污性能和力学性能，该生物两亲水凝胶涂层完好无损，几乎没有海洋生物附着。这项工作为生物基高性能防污涂料的制造提供了新的策略。