Benzotriazole loading in confined ZIF-8@mSiO2 nanospaces for waterborne anticorrosion coatings

🔗 원문 전체 보기 → Royal Society of Chemistry

요약

J. Mater. Chem. A, 2026, Advance ArticleDOI: 10.1039/D6TA00863A, PaperKwang Keat Leong, Minjun Kim, Asep Sugih Nugraha, Jeffrey Venezuela, Yusuf Valentino Kaneti, Muxina Konarova, Yusuke Yamauchi, Yuan Ma, Nasim AmiralianA hierarchical BTA-ZIF-8@mSiO2 nanocar…

본문

Benzotriazole loading in confined ZIF-8@mSiO2 nanospaces for waterborne anticorrosion coatings

* Corresponding authors

a Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, Queensland 4071, Australia
E-mail: [email protected], [email protected], [email protected]

b School of Mechanical and Mining Engineering, Faculty of Engineering, Architecture and Information Technology, The University of Queensland, Brisbane, Queensland 4071, Australia

c School of Chemical Engineering, The University of Queensland, Brisbane, Queensland 4071, Australia

d Department of Materials Process Engineering, Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan

e Baoshan Iron & Steel Co., Ltd, Shanghai 201900, China

Abstract

Zinc (Zn) plating is widely used for steel protection but suffers from limited long-term anticorrosion performance, and it often relies on toxic corrosion inhibitors that are increasingly restricted by environmental regulations. We report a sustainable waterborne polyurethane (WPU) coating embedded with benzotriazole (BTA)-loaded zeolitic imidazolate framework-8 (ZIF-8) nanoparticles coated with mesoporous silica (BTA-ZIF-8@mSiO2). BTA was introduced via linker exchange, achieving strong Zn-BTA coordination, while the silica shell enhanced nanoparticle dispersion, film uniformity, and BTA loading (5.6% → 11%). This core–shell system delivers dual protection: rapid barrier action from a compact silica-modified film and sustained corrosion inhibition from controlled BTA release. Electrochemical impedance spectroscopy (EIS) showed an impedance |Z|0.01Hz of 2.43 × 105 Ω cm2 and a phase angle of 70° after 21 days, indicating a sustained barrier performance over the immersion period. This strategy demonstrates the potential of MOF-silica architectures to enable environmentally friendly, high-performance waterborne coatings for durable steel corrosion control.

• This article is part of the themed collection: Journal of Materials Chemistry A HOT Papers