硅酸盐通报2026，Vol.45Issue(5)：1580-1590,1602,12.DOI:10.16552/j.cnki.issn1001-1625.2025.1002
二氧化硅改性环氧涂层的制备及其对钢筋的防护性能研究
Preparation of Silica-Modified Epoxy Coating and Its Protective Performance on Steel Bars
摘要
Abstract
To enhance the comprehensive performance of epoxy resin(EP)coatings in steel reinforcement protection,this study addressed issues such as high brittleness,high porosity,and weak interfacial bonding.Nano-SiO2(NH2-SiO2)was modified by γ-aminopropyl triethoxysilane(γ-APS)to prepare amino functional nano-SiO2,which was introduced into epoxy resin to prepare NH2-SiO2/EP composite coating.FTIR,TGA,and XPS analyses confirm successful modification:amino functional groups are successfully grafted on the surface of SiO2 by chemical bonding,improving dispersion and interfacial compatibility of nanoparticles in epoxy matrix.SEM and EDS analysis reveal optimal coating density with uniform particle distribution at 3%(mass fraction)NH2-SiO2 content.Research indicates that the 3%-NH2-SiO2/EP composite coating exhibits approximately 75%higher tensile strength than pure epoxy resin,and the maximum load is 2.2 kN;while reducing coefficient of friction from 0.97 to 0.77,demonstrating significant wear resistance improvement.Electrochemical impedance spectroscopy(EIS)results indicate that the coating maintained impedance modulus is still above 1×1011 Ω·cm² after 3 d immersion in 3.5%NaCl concrete simulated corrosion solution,showing excellent corrosion resistance.This study provides a theoretical basis for design and application of anti-corrosion coating for high performance steel bars.关键词
环氧树脂/γ-APS/二氧化硅/表面改性/力学性能/耐磨性能/防腐性能/电化学阻抗Key words
epoxy resin/γ-APS/silica/surface modification/mechanical property/wear resistance/corrosion resistance/electrochemical impedance分类
能源科技引用本文复制引用
孔硕,耿永娟,刘彦岑,李绍纯..二氧化硅改性环氧涂层的制备及其对钢筋的防护性能研究[J].硅酸盐通报,2026,45(5):1580-1590,1602,12.基金项目
国家自然科学基金项目(52479125) （52479125）
青岛市自然科学基金项目(24-4-4-zrjj-198-jch) （24-4-4-zrjj-198-jch）
山东省自然科学基金资助项目(ZR2021QD009) （ZR2021QD009）
