Enhancing the Anticorrosion Properties of Waterborne Polyurethane Coatings with SiO2 Nanoparticles
Abstract
In this study we attempt to add 3-amino-propyltrimethoxysilane (APTMS) and SiO2 nanoparticles to a waterborne polyurethane (WPU) dispersion to make it an excellent anti-corrosion coating material for protecting metal surfaces. In addition to providing hydrophobicity to the coating, the SiO2 nanoparticles also act as crosslinking points for interconnecting PU chains through reactions with APTMS. In the gel content test, we found that the addition of SiO2 nanoparticles indeed led to a higher degree of crosslinking than the addition of APTMS alone. The degree of crosslinking continued to increase when the concentration of SiO2 was increased from 5 phr to 10 phr. The pencil hardness test and contact angle measurement also showed that increasing the crosslinking degree and SiO2 concentration of the coating can effectively improve the hardness of the coating and enhance its hydrophobicity. The copper sulfate test also revealed that the addition of SiO2 nanoparticles can improve the diffusion resistance of corrosive substances in the coating. Finally, the salt spray test results showed that compared with the coating containing only APTMS, the addition of SiO2 nanoparticles can further improve the corrosion resistance.
Keywords
Anticorrosion Coating, Silane Coupling Agent, Sio2 Nanoparticles, Waterborne Polyurethane
Citations
IRE Journals:
Horng-Jer Tai , Hsin-Sheng Hsieh
"Enhancing the Anticorrosion Properties of Waterborne Polyurethane Coatings with SiO2 Nanoparticles" Iconic Research And Engineering Journals Volume 9 Issue 1 2025 Page 346-350
IEEE:
Horng-Jer Tai , Hsin-Sheng Hsieh
"Enhancing the Anticorrosion Properties of Waterborne Polyurethane Coatings with SiO2 Nanoparticles" Iconic Research And Engineering Journals, 9(1)
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