A biomass green synthesis process: aqueous jatropha oil-based polyurethane coating with high transparency, hydrophobicity and corrosion resistance

Xinwei Li, Guangzhao Chen, Jing Zhang, Yizhang Luo, Xiaohan Bai, Ye Tang Pan*, Huiying Gao*, Na Wang

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

摘要

Developing waterborne bio-based coatings with both anti-corrosion and anti-fouling properties through green preparation processes was critical for environmental protection and the advancement of waterborne coatings. In this study, jatropha oil was used as a raw material, and functionalized molecular design was applied to successfully synthesize controllable jatropha oil-based polyol (o-JOL) through a catalyst-free green chemical process. This product was further polymerized with isophorone diisocyanate (IPDI) using a designed chain structure approach, resulting in a Jatropha oil-based waterborne polyurethane (JPU) coating dispersion. Subsequently, it was applied to create a high-performance coating on Q235 carbon steel surfaces. The coating exhibited a smooth surface and high density, with a transmittance of up to 90.24 %, demonstrating effective cross-linking reactivity. It maintained a high water contact angle (115°) and a low surface energy (23.51 m N/m), exhibiting excellent hydrophobic properties. Electrochemical testing revealed significant improvements in the coating's anti-corrosion performance, with a corrosion potential shift of 850 mV and a reduction in corrosion current density by five orders of magnitude. After soaking for 29 days, the impedance modulus |Z| f=0.01 Hz remained at 107 Ω·cm2, indicating outstanding corrosion resistance, which surpassed that of similar types of bio-based polyurethane coatings. This work offers a straightforward strategy for the selection of diversified polyurethane monomers and the high-performance preparation of bio-based waterborne polyurethanes.

源语言英语
文章编号109303
期刊Progress in Organic Coatings
206
DOI
出版状态已出版 - 9月 2025
已对外发布

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