Ye Yuansong, Shi Huiping, Zhang Yuchi, Xia Jianrong, Shiu Bing-Chiuan, Fang Run
College of Materials and Chemical Engineering, Minjiang University, Fuzhou 350108, China.
Fujian Engineering and Research Center of New Chinese Lacquer Materials, Minjiang University, Fuzhou 350108, China.
Polymers (Basel). 2024 Nov 30;16(23):3392. doi: 10.3390/polym16233392.
Urushiol is recognized as a sustainable coating material with superior properties; however, it faces significant challenges in applications such as petrochemicals and marine engineering due to surface oil contamination. This study aimed to enhance the cleanability of urushiol-based coatings through hydrophilic modification. Polyethylene glycol monooleate (PEGMO) was identified as an appropriate hydrophilic macromonomer and utilized as a modifier to develop a novel urushiol-based coating, termed P(U-PEGMO), via thermal curing. The results indicated that copolymerization occurred between urushiol and PEGMO during the curing process, forming a stable urushiol copolymer with favorable compatibility. The incorporation of PEGMO greatly improved the surface hydrophilicity of the coatings, as evidenced by a reduction in the water contact angle to below 30° when the modifier content reached 30% or higher, demonstrating a high degree of surface hydrophilicity. This enhanced property imparted the modified coating with underwater superoleophobicity and reduced oil adhesion, thereby facilitating the removal of oil. The cleaning performance was evaluated using a simple water rinsing method, after which, less than 2.5 wt% of oil residues remained on the surface of the modified coating. The high hydrophilicity is considered responsible for the coating's easy-cleaning capability. In addition, the modified coatings exhibited improved flexibility and impact resistance, albeit with a slight decrease in hardness.
漆酚被认为是一种具有优异性能的可持续涂料材料；然而，由于表面油污污染，它在石油化工和海洋工程等应用中面临重大挑战。本研究旨在通过亲水性改性提高漆酚基涂料的可清洁性。聚乙二醇单油酸酯（PEGMO）被确定为一种合适的亲水性大分子单体，并用作改性剂，通过热固化制备了一种新型的漆酚基涂料，称为P（U-PEGMO）。结果表明，在固化过程中漆酚与PEGMO发生共聚，形成了具有良好相容性的稳定漆酚共聚物。PEGMO的加入大大提高了涂层的表面亲水性，当改性剂含量达到30%或更高时，水接触角降低到30°以下，表明具有高度的表面亲水性。这种增强的性能赋予改性涂层水下超疏油性并降低了油附着力，从而便于去除油污。使用简单的水冲洗方法评估清洁性能，之后，改性涂层表面残留的油污不到2.5 wt%。高亲水性被认为是涂层易于清洁的原因。此外，改性涂层的柔韧性和抗冲击性有所提高，尽管硬度略有下降。
