硅酸盐通报2025，Vol.44Issue(5)：1622-1633,12.DOI:10.16552/j.cnki.issn1001-1625.2024.1195
用于腐蚀保护的NO2--LDHs自愈微胶囊的制备及性能研究
Preparation and Properties of NO2--LDHs Self-Healing Microcapsules for Corrosion Protection
摘要
Abstract
Aiming at the engineering problem of concrete easy to crack,difficult to repair,and fast corrosion of reinforcement after cracking,microcapsules with tung oil(TO)as the core material,sodium alginate(SA)and nitrite-modified magnesium-aluminum hydrotalcites(NO2--LDHs)as the wall material were prepared in this paper by using the sharp-pore solid-bath method.Three factors,namely,different TO and SA mass ratios,SA concentration,and emulsifier concentration were optimized by response surface analysis using the encapsulation rate as the response index.The polarization curves of the reinforcement were tested and the strength recovery rates of mortar specimens with microcapsules dosed at 0％ and 1％(mass fraction)were compared under dry and wet cured conditions.The results show that the maximum encapsulation rate of microcapsules on TO is 74.03％ when the mass ratio of TO and SA is 9∶1,the concentration of SA is 1.69％(mass fraction),and the concentration of sodium dodecyl benzene sulfonate(SDBS)is 0.95％(mass fraction).The prepared microcapsules have a certain degree of corrosion inhibition effectiveness,and the efficiency of corrosion inhibition at 6％ dosing of solution mass is 93.35％.The results of self-repair experiments show that microcapsules can significantly improve the compressive strength recovery rate of mortar specimens,and the 28 d recovery rate of dry cured specimens(80％)is higher than that of wet cured specimens(76％).关键词
微胶囊/缓蚀剂/水滑石/桐油/水泥基材料/自修复Key words
microcapsule/corrosion inhibitor/hydrotalcite/tung oil/cement-based material/self-healing分类
土木建筑引用本文复制引用
田沛丰,温勇,郭晓琦,林海孟..用于腐蚀保护的NO2--LDHs自愈微胶囊的制备及性能研究[J].硅酸盐通报,2025,44(5):1622-1633,12.基金项目
自治区科技计划项目重点研发专项(2022B03034-2) （2022B03034-2）
国家自然科学基金(52168036) （52168036）
新疆维吾尔自治区"天山英才"科技创新领军人才项目(2023TSYCLJ0006) （2023TSYCLJ0006）
