Abstract New amino-functionalized smart silica composites and nanoparticles were prepared from hydrolyzing microgel based on N-isopropylacrylamide-co-vinyltrimethoxysilane (NIPAM-VTS) with tetraethoxysilane (TEOS) and 3-aminopropyltriethoxysilane (APTS). The chemical structure, morphology, particle sizes, and thermal stability were evaluated and proved that the amino group contents were increased on the surfaces of silica composites more than that modified after calcination at 700 °C. The amino-functionalized calcined silica nanoparticles and NIPAM-VTS-polysiloxane were found to show better dispersion capability than silica NPs particles existed in the epoxy hybrid coatings. The amino-functionalized hybrid silica epoxy coatings were found to be much superior in the adhesion, mechanical testing and corrosion protection over those of hybrid materials without amino-functionalization. The amino-functionalized NIPAM-VTS-polysiloxane shows new self-healing performance when blended with epoxy matrix at weight content equals or above 6 Wt. % after exposure to salt spray humidity of seawater. The self-healing performance may have probably resulted from the salt sensitivity of amino-functionalized NIPAM-VTS-polysiloxane composite and enhancement of the adhesion strength due to the formation of Fe O Si and Fe NH Si covalent bonds at the interface of epoxy coating.

中文翻译：

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用于钢涂层的化学键合二氧化硅/环氧树脂的自修复

摘要 以N-异丙基丙烯酰胺-共-乙烯基三甲氧基硅烷(NIPAM-VTS)、四乙氧基硅烷(TEOS)和3-氨基丙基三乙氧基硅烷(APTS)为原料，通过水解微凝胶制备了新型氨基官能化智能二氧化硅复合材料和纳米颗粒。对化学结构、形貌、粒径和热稳定性进行了评估，并证明在 700°C 煅烧后，二氧化硅复合材料表面的氨基含量比改性后的增加更多。发现氨基官能化的煅烧二氧化硅纳米粒子和 NIPAM-VTS-聚硅氧烷比环氧杂化涂层中存在的二氧化硅 NPs 粒子显示出更好的分散能力。发现氨基官能化的杂化二氧化硅环氧涂层在附着力方面要优越得多，机械测试和腐蚀保护超过那些没有氨基官能化的混合材料。氨基官能化的 NIPAM-VTS-聚硅氧烷在与环氧基质以重量含量等于或高于 6 Wt 混合时显示出新的自修复性能。暴露于海水盐雾湿度后的百分比。自修复性能可能是由于氨基官能化 NIPAM-VTS-聚硅氧烷复合材料的盐敏感性和由于在环氧树脂涂层界面处形成 Fe O Si 和 Fe NH Si 共价键而提高粘合强度的结果。