This work presents the performance of a SiO₂-epoxy nanocomposite lining for the anticorrosion of the concrete structures in sewer networks. Nanocomposite lining on the concrete substrate surface of the 15 phr (part per hundred epoxy resin) amine-cured epoxy polymer containing 3.0 phr of nano-SiO₂ was prepared by intercalating epoxy into the SiO₂ via direct mixing process. The silica exfoliation was monitored by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The barrier feature of epoxy the base nanocomposite against water and sulfuric acid solution was evaluated. The results showed that the nanocomposite lining was of a great barrier against these corrosive environments due to the intercalation and exfoliation caused by the dispersion of the SiO₂ nanoparticles into the epoxy matrix. The rate of the H₂SO₄ into the nanocomposite lining was also investigated by measurement of the depth of the sulfur element penetrated layer using the coupled Scanning Electron Microscopy (SEM)/Energy dispersive X-ray spectrometer (EDS). Deterioration behavior of the adhesion strength of the nanocomposite lining was studied. The nanocomposite lining shows a significant improvement of bond strength in comparison to the neat epoxy lining. The durability of the nanocomposite lining adhesion when the lining systems exposed to water and the sulfuric acid solution is also improved significantly.

中文翻译：

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H2SO4溶液中环氧树脂基纳米二氧化硅复合材料衬砌对污水混凝土结构防腐蚀性能的评估

这项工作介绍了SiO _2-环氧纳米复合材料衬砌在下水道网络中对混凝土结构的防腐性能。在15份（每百种环氧树脂部树脂）的混凝土基底表面上的纳米复合材料衬里胺固化的含有3.0份的环氧聚合物纳米的SiO ₂的制备是通过嵌入环氧树脂注入到的SiO ₂通过直接混合过程。通过X射线衍射（XRD）和透射电子显微镜（TEM）监测二氧化硅剥离。评价了环氧树脂基纳米复合材料对水和硫酸溶液的阻隔性能。结果表明，由于SiO ₂纳米颗粒分散到环氧基质中而引起的嵌入和剥落，纳米复合材料衬里对这些腐蚀性环境具有很大的阻挡作用。H ₂ SO ₄的比率还通过使用耦合扫描电子显微镜（SEM）/能量色散X射线光谱仪（EDS）测量硫元素渗透层的深度来研究进入纳米复合材料衬里的材料。研究了纳米复合材料衬里的粘附强度的劣化行为。与纯环氧衬里相比，纳米复合衬里显示出粘合强度的显着提高。当衬里体系暴露于水和硫酸溶液时，纳米复合衬里粘附的耐久性也得到显着改善。