摘要：本文是采用溶膠凝膠制備納米SiO2并用KH-560作為改性劑對其進(jìn)行原位改性并對其進(jìn)行了表征，制備了納米SiO2/環(huán)氧復(fù)合涂料，研究了改性的SiO2對環(huán)氧涂料力學(xué)及耐蝕性能的影響。實驗結(jié)果表明：紅外譜圖與熱重分析證明了KH-560與納米二氧化硅之間發(fā)生了化學(xué)接枝，通過TEM發(fā)現(xiàn)納米粒子的分散性得到了極大的改善，潤濕性實驗表明納米粒子的親水性下降。通過對復(fù)合涂層的性能測試發(fā)現(xiàn)適量的納米SiO2極大的改善了環(huán)氧涂料的力學(xué)性能，在納米粒子的添加量為3%時涂層的具有最佳的力學(xué)性能。在紫外老化及鹽霧的加速腐蝕實驗條件下，納米SiO2環(huán)氧復(fù)合涂層的性能明顯優(yōu)于常規(guī)環(huán)氧涂層。

關(guān)鍵詞：納米二氧化硅；環(huán)氧樹脂；改性；防腐

Abstract:In this article, nano-SiO2 was prepared by sol-gel technique, in-situ modified by KH560 then was characterized. We also produced nano-SiO2 / epoxy composite coating and studied the impact of modified nano-SiO2 in mechanical properties and corrosion resistance of Epoxy coating. The experimental results showed that: TG and FTIR analysis proved that the chemical graft appeared between KH-560 and nano-silica, through TEM analysis we could find that the dispersion of nano-SiO2 had been greatly improved, and the wettability experiments showed that the hydrophily of the modified nanoparticles declined. Through the test of composite coating performance, we found that the proper amount of nano-SiO2 greatly improved the mechanical properties of epoxy coating. When the content of nanoparticles was 3%,the composite coating would have the best mechanical properties.The corrosion-resistance of nano-SiO2/epoxy composite coating was obviously better than conventional epoxy coating in Uv aging test and salt mist test.

Key words: nano-SiO2; epoxy resin; modification; anticorrosion