Enhancing hydrophobicity and corrosion resistance of epoxy resin coatings using KH570-ZrO2 nanoparticles

作者：Yi‐nan Wu, Qianqian Yang, Haibao Zhang, Yutong Zhou, Haoyan Guo, Zhenjun Wang, Gang Li · 发表于：Polymer Testing · 年份：2025 · DOI：10.1016/j.polymertesting.2025.109070 · 被引用次数：7 · 研究领域：Corrosion Behavior and Inhibition、Concrete and Cement Materials Research、Concrete Corrosion and Durability

Epoxy resin has excellent adhesion, mechanical strength, environmental adaptability and corrosion resistance. As a concrete coating, it can effectively seal internal pores, prevent the penetration of water and corrosive ions. However, the epoxy resin has a relatively high content of hydrophilic groups and lacks an effective physical barrier structure. In this work, KH570-ZrO 2 nanoparticles were synthesized by modifying zirconium oxide (ZrO 2 ) with 3-Methacryloxypropyltrimethoxysilane (KH570) and then mixed with epoxy resin to prepare epoxy coatings. The thermal properties, mechanical properties, hydrophobicity and corrosion resistance of the coatings were studied respectively. The results indicated that when the content of ZrO 2 particles was 3.0 wt% of the epoxy resin, the modified epoxy coating demonstrated the most notable enhancements in both thermal and mechanical properties. Moreover, it exhibited optimal hydrophobicity and corrosion resistance. The KH570-ZrO 2 nanoparticles constructed a micro-nano composite rough structure. Meanwhile, low surface energy organosilane segments were introduced. These two factors jointly decreased the contact. In addition, KH570-ZrO 2 particles are uniformly dispersed in the cross linked network. Through the “maze effect”, they extend the diffusion paths of environmental moisture, oxygen, and various ions, thereby effectively inhibiting the penetration of these media into the concrete matrix. Overall, this work successfully improved the...