Enhancing corrosion protection properties of sol-gel coating by pH-responsive amino-silane functionalized graphene oxide-mesoporous silica nanosheets.
- Resource Type
- Article
- Authors
- Xiong, Liangliang; Liu, Jianhua; Li, Yingquan; Li, Songmei; Yu, Mei
- Source
- Progress in Organic Coatings. Oct2019, Vol. 135, p228-239. 12p.
- Subject
- *CORROSION & anti-corrosives
*BENZOTRIAZOLE derivatives
*MESOPOROUS silica
*SILICA
*SURFACE coatings
*BENZOTRIAZOLE
*IMPEDANCE spectroscopy
- Language
- ISSN
- 0300-9440
• Amino-silane functionalized graphene oxide-mesoporous silica was synthesized to load inhibitor benzotriazole (fGS-BTA). • Silane reinforced the compatibility of fGS in sol as well as suppressed the premature leakage of BTA as pH-driven nanogate. • Benzotriazole was released under the stimulation of OH− anions in sol-gel coating. • Inhibitor release kinetic was depicted by the power law based on the UV–vis release curves. • fGS-BTA nanosheets improved the protective properties of sol-gel coating by enhancing passive and active protection. Amino-silane functionalized graphene oxide-ordered mesoporous silica nanocontainer was synthesized to load corrosion inhibitor benzotriazole, and the synthesized two-dimensional composite was named as fGS-BTA. Its compatibility and dispersion stability in sol solution was prominently reinforced by amino-silane functionalization. Meanwhile, amino-silane as pH-driven "nanogate" suppressed the premature leakage of inhibitor, which endowed fGS-BTA nanocomposite the stimuli-responsive release under alkaline condition. Electrochemical impedance spectroscopy of intact and scratched sol-gel coating filled with fGS-BTA nanosheets showed the enhanced barrier property and the active protection capacity. [ABSTRACT FROM AUTHOR]