Ali Ola A Abu, Al Shareef Hossa F, Felaly Rasha, El-Sawy M M
Department of Chemistry, College of Science, Taif University, Taif, 21944, Saudi Arabia.
Department of Chemistry, Faculty of Sciences, Umm Al-Qura University, Makkah, Saudi Arabia.
Sci Rep. 2025 Sep 2;15(1):32265. doi: 10.1038/s41598-025-07062-x.
Polyesteramide resins were successfully synthesized via aminolysis of sunflower oil with diethanolamine under mild catalytic conditions, yielding N,N-bis(2-hydroxyethyl) sunflower amide (HESA) with a hydroxyl value of 9.02 mg KOH/g. HESA was then polymerised with N,N-Bis(4-hydroxyphenyl)maleamic acid (BHPMA) and N,N-Bis(4-sulfonicphenyl)maleamic acid (BSPMA) to form modified polyesteramide resins for protective coating applications. The synthesized coatings, with a thickness of approximately 30 ± 5 µm, were evaluated for mechanical and chemical properties, including drying times ranging from 58 to 60 h under air-drying conditions, and enhanced corrosion resistance confirmed by 500-h salt spray tests. Analytical techniques such as FTIR, 1H NMR, and SEM confirmed the structure and morphology of the resins. The improved anticorrosive performance was attributed to the incorporation of sulfonic and aromatic groups, which enhance film density, chemical stability, and resistance to ionic penetration. The results support the application of these bio-based resins as eco-friendly and efficient protective coatings for industrial surfaces.
在温和的催化条件下，通过向日葵油与二乙醇胺的氨解反应成功合成了聚酯酰胺树脂，得到羟值为9.02 mg KOH/g的N,N-双(2-羟乙基)向日葵酰胺(HESA)。然后将HESA与N,N-双(4-羟苯基)马来酰胺酸(BHPMA)和N,N-双(4-磺酸苯基)马来酰胺酸(BSPMA)聚合，形成用于防护涂层应用的改性聚酯酰胺树脂。合成的涂层厚度约为30±5 µm，对其机械性能和化学性能进行了评估，包括在空气干燥条件下干燥时间为58至60小时，以及通过500小时盐雾试验证实的增强的耐腐蚀性。傅里叶变换红外光谱(FTIR)、核磁共振氢谱(1H NMR)和扫描电子显微镜(SEM)等分析技术证实了树脂的结构和形态。防腐性能的提高归因于磺酸基和芳基的引入，这提高了膜密度、化学稳定性和抗离子渗透能力。结果支持了这些生物基树脂作为工业表面环保高效防护涂层的应用。
