【目的】针对水下混凝土结构在服役环境中易受侵蚀而破坏，防护涂层与混凝土界面附着力差的问题。【方法】基于仿生贻贝黏附原理，制备了一种含有邻苯二酚结构的湿固化混凝土防护涂层。采用纳米二氧化锆粒子（ZrO₂）对环氧树脂进行改性，并利用盐酸多巴胺（DA）与氨基聚二甲基硅氧烷（PDMAS）的交联反应，通过顺序互穿网络（IPN）技术制备了含邻苯二酚基团的环氧树脂涂层（ZrO₂/EP/D-PDMAS）。通过傅立叶变换红外光谱仪（FT-IR）和扫描电子显微镜（SEM）对涂层的分子结构和微观形貌进行了表征，通过测试涂层附着力、耐腐蚀性和力学性能等，探究了 DA含量对涂层综合性能的影响。【结果】当 DA含量为 4%时， ZrO₂/EP/D-PDMAS涂层的综合性能最佳，其在水下环境中混凝土表面的附着力达到 4. 59 MPa，比 ZrO₂/EP涂层提高了 117. 54%。与 EP涂层相比，ZrO₂/EP/D-PDMAS涂层腐蚀电流密度从 4. 914×10^-7 A/cm²减小至 4. 393×10^-8 A/cm²，腐蚀电位从-0. 709 V提高到-0. 597 V。【结论】ZrO₂/EP/D-PDMAS涂层借助邻苯二酚基团的仿生黏附效应，有效解决了水下混凝土涂层界面结合力不足的难题。涂层合成方法简单、原料成本低廉，具有良好的界面附着力和防腐性能，可有效提升对混凝土基材的防护作用。

［Objective］ To address the erosion damage and poor interfacial adhesion betweenprotective coatings and concrete substrates for underwater concrete structures，a wet-curable concrete protective coating containing catechol groups was prepared based on the biomimetic mussel adhesionprinciple.［Methods］Epoxy resin（EP）was modified with nano-zirconium dioxide particles（ZrO₂）. Dopamine hydrochloride（DA）was then crosslinked with aminopropyl polydimethylsiloxane（PDMAS）. Subsequently，a catechol-containing epoxy coating（ZrO₂/EP/D-PDMAS）was prepared via sequential interpenetrating polymer network（IPN）technology. The molecular structure and microstructure of thecoating were characterized by Fourier transform infrared spectroscopy（FT-IR）and scanning electron microscopy（SEM）. The effect of DA content on the comprehensive performance of the coating was investigated through tests of adhesion strength，corrosion resistance，and mechanical properties.
［Results］The results showed that the ZrO₂/EP/D-PDMAS coating exhibited optimal comprehensiveperformance at a DA content of 4wt% . It achieved an adhesion strength of 4. 59 MPa on concretesurfaces in underwater environments，representing a 117. 54% increase compared with the ZrO₂/EP coating. Moreover，relative to the pure EP coating，the corrosion current density of the ZrO2/EP/D-PDMAS coating reduced from 4. 914×10^-7 A/cm² to 4. 393×10^-8 A/cm²，and the corrosion potential positively shifted from -0. 709 V to -0. 597 V.［Conclusion］ The ZrO2/EP/D-PDMAS coatingeffectively resolved the insufficient interfacial bonding strength of underwater concrete coatings throughthe biomimetic adhesion effect of catechol groups. With its simple synthesis process，low raw material cost，excellent interfacial adhesion and corrosion resistance，this coating significantly enhanced the protection of concrete substrates.