Preparation of Environmentally Friendly Anticorrosive Coatings with Aniline Trimer-Modified Waterborne Polyurethane
Source abstract
Abstract
Eco-friendly waterborne coatings frequently exhibit poor corrosion resistance, high solvent content, and extended curing times, attributed to the excessive employment of hydrophilic groups and petroleum-derived polyols. In this work, aniline trimer (ACAT) and polyethylene glycol (PEG) were used as chain extenders. E-44 epoxy resin was subsequently utilized to modify the system and an aniline trimer-modified waterborne polyurethane (AT-WPU) dispersion was prepared and characterized. The chemical structure of the synthesized ACAT was characterized employing 1H NMR, ESI-MS, and FTIR spectroscopy. The structure and coating performance of the AT-WPU dispersion were investigated utilizing FTIR, particle size analysis, thermogravimetric analysis, DSC, TEM, SEM, and electrochemical corrosion testing. The results demonstrate that the aniline trimer-modified waterborne polyurethane dispersion was successfully synthesized. Additionally, the DSC analysis results and thermogravimetric graphs indicate that the glass transition temperature and thermal stability of the coatings increased with the addition of aniline trimer. As the aniline trimer content increased, the hardness and adhesion of the coatings were significantly enhanced. In the electrochemical corrosion assessment, the corrosion current density of AT-WPU-3 attained 7.245 × 10−9 A·cm−2, and the corrosion rate was as low as 0.08 μm·Y−1, indicating excellent corrosion resistance. The present study provides promising practical applications in the domain of metal material protection.
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Research context
OpenAlex topics: Polymer composites and self-healing · Synthesis and properties of polymers · Photopolymerization techniques and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Materials Science and Engineering, Xihua University, Chengdu 610039, China
The Laboratory of Advanced Energetic Materials and Devices, Xihua University, Chengdu 610039, China
Dong Fang Electrical Machinery Co., Ltd., Deyang 618000, China
Funding
Laboratory of Advanced Energetic Materials and Devices · Xihua University Science and Technology Innovation Competition Project for Postgraduate Students
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