Superhydrophobic epoxy nanocomposites coatings with superior mechanical and adhesion strength are targeted to increase epoxy coating performance and to protect steel corrosion in aggressive environment. The present work prepared hydrophobic organic modified inorganic nanoparticles (NPs) based on magnetite, titanium dioxide and silver capped with epoxide oleic, linoleic and linolenic fatty acids. Their chemical structures, thermal stability, crystalline lattice structure, morphology and particles sizes distribution were determined using different tools. The curing exothermic reactions and thermal mechanical properties of the cured commercial epoxy with polyamine hardener were evaluated in the presence of the modified NPs to investigate their effect on the curing mechanism and crosslinking densities of the cured epoxy networks. The adhesion strength, abrasion resistance, seawater contact angles and seawater salt spray resistances of the cured epoxy coatings were evaluated on the steel surfaces. The obtained results confirm that the increasing weight contents of the modified NPs embedded into epoxy networks via chemical linking affect the adhesion, superhydrophobicity and anticorrosion performances of the cured epoxy coatings on the steel surfaces.

中文翻译：

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功能化超疏水无机/环氧纳米复合材料的固化及其在钢中的应用

具有超强机械强度和粘合强度的超疏水环氧纳米复合涂料的目标是提高环氧涂料的性能并在侵蚀性环境中保护钢的腐蚀。本工作制备了基于磁铁矿，二氧化钛和银的疏水性有机改性无机纳米颗粒（NPs），并用环氧油酸，亚油酸和亚麻酸脂肪酸封端。使用不同的工具确定了它们的化学结构，热稳定性，晶格结构，形态和粒径分布。在改性的NPs存在下，评估了用聚胺固化剂固化的商用环氧树脂的固化放热反应和热机械性能，以研究它们对固化的环氧树脂网络的固化机理和交联密度的影响。附着强度 在钢表面上评估了固化的环氧涂料的耐磨性，海水接触角和海水盐雾耐受性。所得结果证实，通过化学键合嵌入环氧网络的改性NP的重量含量增加，会影响固化的环氧涂层在钢表面上的附着力，超疏水性和防腐性能。