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Updated: Jun 12, 2026

The Evolution of Silica Nanoparticle-polyester Coatings on Surfaces Exposed to Sunlight
Published on: October 11, 2016
Lignin-modified high-performance waterborne polyurethane with enhanced UV, corrosion, and weather resistance for
Qingyi Xie1, Xiaolin Wang2, Yuqing Wang2
1Key Laboratory of Bio-based Polymeric Materials Technology and Application of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, People's Republic of China; University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China.
Abstract:
The incorporation of lignin into waterborne polyurethane (WPU) networks for the preparation of high-performance, multifunctional protective coatings represents a highly attractive yet challenging research direction. This study employed a highly reactive soluble modified lignin (MOLA) as a polyol and incorporated it into the main chain of a WPU polymer network. A series of bio-based waterborne polyurethanes (CLWPU-COx) with tailored molecular architecture was synthesized and found to exhibit corrosion resistance, UV blocking, UV-aging resistance, self-cleaning behavior, weather resistance, biodegradability, and non-biotoxicity. The influence of MOLA content on the chemical structure and properties of CLWPU-COx was systematically investigated, and quantitative structure-property relationships between the MOLA loading ratio and material properties were established. The results indicated that MOLA simultaneously served as both a chemical and physical crosslinking site, thereby regulating the microphase separation of WPU. The resulting uniform internal structure and high crosslinking density endowed CLWPU-COx with excellent hydrophobicity, water vapor barrier properties, gas barrier properties, and long-term outdoor durability, confirming its considerable potential for marine anti-corrosion protective coating applications.
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