Wang Tianyu, Zeng Cong
Department of Engineering, China University of Geosciences, Wuhan 430074, China.
Materials (Basel). 2020 Nov 6;13(21):5004. doi: 10.3390/ma13215004.
A great number of urban underground concrete water drainage systems in China are facing challenges of corrosion, blockage, and leakage. This could result in engineering accidents such as urban inland inundation, pipeline collapse, leakage, and blockage. The common contributing factors for pipeline leakage and blockage are the porous structures and the perishable surfaces of concrete pipes. To address these issues, we synthesized superhydrophobic coating materials such as SiO aerosol, bisphenol A diglycidyl ether (DGEBA), and N-β-aminoethyl-γ-aminopropyltrimethoxysilane (AEAPTS). Our superhydrophobic coating on cement-based surfaces presents good waterproof ability, mechanical stability, and self-cleaning properties. Test results show that the superhydrophobic coating exhibits higher water discharge capacity and survivability to corrosive underground water drainage pipeline environments. Hence, this SiO aerosol @ bisphenol A diglycidyl ether coating possesses enormous potential in surface modification of pipeline rehabilitation materials.
中国大量城市地下混凝土排水系统面临腐蚀、堵塞和渗漏等挑战。这可能导致诸如城市内涝、管道坍塌、泄漏和堵塞等工程事故。管道泄漏和堵塞的常见促成因素是混凝土管道的多孔结构和易腐表面。为了解决这些问题，我们合成了超疏水涂层材料，如二氧化硅气溶胶、双酚A二缩水甘油醚（DGEBA）和N-β-氨乙基-γ-氨丙基三甲氧基硅烷（AEAPTS）。我们在水泥基表面的超疏水涂层具有良好的防水能力、机械稳定性和自清洁性能。测试结果表明，超疏水涂层在腐蚀性地下水排水管道环境中表现出更高的排水能力和生存能力。因此，这种二氧化硅气溶胶@双酚A二缩水甘油醚涂层在管道修复材料的表面改性方面具有巨大潜力。
