Journal Article

Anticorrosive and UV-blocking waterborne polyurethane composite coating containing novel two-dimensional Ti3C2 MXene nanosheets

Li, Sihao, Sheng, Xinxin, Xie, Delong, Chen, Ying, Zhang, Li, Huang, Haowei, Zhao, Yanfeng

2021

Overview

In this work, Ti 3 C 2 MXene, a novel two-dimensional nanosheet, was introduced to waterborne polyurethane (WPU) coatings to prepare a composite coating. First, MAX phase materials were in situ etched by HF acid and further intercalated by water molecules to obtain exfoliated single-layer MXene nanosheet. And then, composite coatings were prepared via solution-blending low addition (0–0.4 wt%) of MXene, self-prepared waterborne polyacrylate emulsion (PAE) and isocyanate hardener, applying on Q235 mild steel. Results of AFM, XRD SEM and SEM–EDS confirm that single-layer MXene nanosheets with large lateral-to-thickness ratio are successfully prepared and achieved homogenous distribution within WPU matrix. With 0.4 wt% MXene incorporated, the WPU/Ti 3 C 2 MXene composite coatings reach a lowest corrosion current of 2.143 × 10 –6  A/cm 2 , a decrease of one order of magnitude compared with blank WPU (1.599 × 10 –5  A/cm 2 ) and own an excellent UV-blocking property (almost block the whole UV light). Graphical abstract

• Publisher: Springer US,Springer Nature B.V
• Subject: Acrylic resins / Blocking / Characterization and Evaluation of Materials / Chemistry and Materials Science / Classical Mechanics / Coatings / Composites & Nanocomposites / corrosion / Corrosion currents / Corrosion prevention / Crystallography and Scattering Methods / emulsions / Isocyanates / Killed steels / Low carbon steels / Materials Science / MXenes / Nanosheets / polyacrylic acid / Polymer Sciences / Polyurethane resins / polyurethanes / Solid Mechanics / steel / Thickness ratio / Two dimensional composites / Ultraviolet radiation / Water chemistry