In the present work, the surface behavior of cotton fabrics coated with a series of bio-based polybenzoxazines is explored. Herein, we report the design and synthesis of bio-based benzoxazine monomers (C-x) using cardanol (C) and seven different amines (x = ba, ha, dda, oda, ddm, jef, and fa). The molecular structures of the benzoxazine monomers have been confirmed using FTIR and NMR analyses. The microstructure of the polybenzoxazine-coated cotton fabrics observed from FE-SEM reveals that formation of rough nanostructure is influenced by molecular structure of monomers. Further, surface analysis shows that poly(C-dda)-coated cotton fabric offers superior water contact angle (WCA = 155° ± 3) with low sliding angle (6°). Also, poly(C-dda)-coated cotton fabric delivers the lowest surface energy (14.1 mN/m) and high resistance against acidic and alkaline media. Subsequently, oil–water separation investigation shows that the poly(C-dda)-coated cotton fabric yields 99% of separation efficiency with flux value of 7200 L/m²h. Thus, the cardanol-based polybenzoxazine-coated cotton fabrics prepared in the present work can find application in the field of oil–water separation due to their superior water-repellent nature.

在目前的工作中，探索了一系列生物基聚苯并恶嗪涂层的棉织物的表面行为。本文中，我们报告了使用腰果酚（C）和七种不同的胺类（x）的生物基苯并恶嗪单体（C- x）的设计与合成 = ba，ha，dda，oda，ddm，jef和fa）。苯并恶嗪单体的分子结构已通过FTIR和NMR分析得到证实。从FE-SEM观察到的聚苯并恶嗪涂层棉织物的微观结构表明，粗糙的纳米结构的形成受单体分子结构的影响。此外，表面分析表明，涂有聚（C-dda）的棉织物具有出色的水接触角（WCA = 155°±3），滑动角低（6°）。而且，涂有聚（C-dda）的棉织物具有最低的表面能（14.1 mN / m），并且对酸性和碱性介质具有很高的抵抗力。随后，油水分离研究表明，聚（C-dda）涂层棉织物的分离效率为99％，通量值为7200 L / m ^2。H。因此，由于其优异的拒水性，本工作中制备的腰果酚基聚苯并恶嗪涂层棉织物可在油水分离领域中找到应用。