Abstract Silicone-acrylic resin (SAR) was prepared from acrylic monomers and silicone prepolymer by the free radical solution polymerization, and then mixed TiO2 and SiO2 nanoparticles modified by KH570 were added to prepare nanocomposite coating. Thermogravimetric analysis and contact angle measurements showed that the acrylic resin modified by silicone prepolymer exhibited an improved thermostability and a better hydrophobicity compared with the unmodified sample. The adding of nanoparticles further increased the hydrophobicity. The contact angle of modified silicone-acrylic resin with mixed TiO2 and SiO2 nanoparticles of 3 wt% is the highest, 108.4°. The UV resistance and weather resistance of the modified silicone-acrylic resin are significantly improved. It was also found through electrochemical impedance spectroscopy that the corrosion resistance was significantly improved by the addition of mixed TiO2 and SiO2 nanoparticles. Modified silicone-acrylic resin with mixed TiO2 and SiO2 nanoparticles of 3 wt% and 5 wt% coating system maintains an excellent anticorrosion performance (coating resistance Rc of more than 109 Ω cm2) even at 3.5% NaCl electrolyte medium till to 1800 h.

中文翻译：

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具有防腐疏水性能的纳米杂化硅丙烯酸树脂的改性

摘要 以丙烯酸单体和有机硅预聚物为原料，通过自由基溶液聚合制备有机硅-丙烯酸树脂（SAR），然后加入KH570改性的TiO2和SiO2纳米颗粒混合制备纳米复合涂层。热重分析和接触角测量表明，与未改性的样品相比，有机硅预聚物改性的丙烯酸树脂表现出更好的热稳定性和更好的疏水性。纳米颗粒的加入进一步增加了疏水性。TiO2 和 SiO2 纳米颗粒混合量为 3 wt% 的改性有机硅-丙烯酸树脂的接触角最高，为 108.4°。改性有机硅丙烯酸树脂的抗紫外线和耐候性得到显着提高。通过电化学阻抗谱还发现，加入混合的 TiO2 和 SiO2 纳米颗粒后，耐腐蚀性能得到显着提高。即使在 3.5% 的 NaCl 电解质介质中，具有 3 wt% 和 5 wt% 涂层体系的混合 TiO2 和 SiO2 纳米粒子的改性硅丙烯酸树脂仍保持优异的防腐性能（涂层电阻 Rc 超过 109 Ω cm2）直至 1800 小时。