Efficient utilization of renewable feedstocks has been considered pivotal in sustainable development, controlling global warming, and as an alternative to petrochemical precursors. Here, we have presented a facile one-pot synthesis method for the fabrication of bacterial resistant, free-standing polymeric films and coatings by utilizing agro-waste based precursor material. The conversion of cashew nut shell liquid (CNSL) into a value-added product for this application was achieved through coordination of methylolated-CNSL and Mg (II) ions (Mg(II)CNSL). The resulting metal-organic framework (MOF) was then cured by following a greener approach with zero toxic/residue production through reacting Mg(II)CNSL with aliphatic amine [Mg(II)CNSL-FA]. The formulation mechanism of nanostructured Mg(II)CNSL-FA via the ring-opening reaction of benzoxazine, its polymerization with hydroxyl groups in CNSL, and coordination of Mg(II) ions were elucidated by FTIR, ATR, XRD, SEM/TEM, and DSC studies. The performance (flexibility, swelling behaviour, and water contact angle values), morphology, and thermal stability of Mg(II)CNSL-FA films were also compared (virgin ligand, CNSL-FA). The potential application of the film as an antibacterial material has been further tested against various bacterial strains (E.coli, P. aeruginosa, S. aureus, and B. subtilis). Overall, the research work is expected to broaden the utilization of CNSL, an agro-waste via cleaner production of flexible, free-standing, metal ions coordinated antibacterial film with possible application in surface coatings, adsorption, and water purification.

有效利用可再生原料被认为是可持续发展，控制全球变暖的关键，并且可以替代石化前体。在这里，我们提出了一种通过利用基于农业废物的前体材料来制造耐细菌，自立式聚合物膜和涂层的简便的一锅法合成方法。通过将羟甲基化的CNSL和Mg（II）CNSL（Mg（II）CNSL）配位，可以将腰果壳液（CNSL）转化为该应用的增值产品。然后，通过使Mg（II）CNSL与脂族胺[Mg（II）CNSL-FA]反应，采用绿色方法固化，从而产生零毒性/残留物，从而固化所得的金属有机骨架（MOF）。通过苯并恶嗪的开环反应制备纳米结构的Mg（II）CNSL-FA的机理 通过FTIR，ATR，XRD，SEM / TEM和DSC研究阐明了其在CNSL中与羟基的聚合以及Mg（II）离子的配位。还比较了Mg（II）CNSL-FA膜的性能（柔韧性，膨胀行为和水接触角值），形态和热稳定性（原始配体，CNSL-FA）。该膜作为抗菌材料的潜在应用已针对多种细菌菌株进行了进一步测试（大肠杆菌，铜绿假单胞菌，金黄色葡萄球菌和枯草芽孢杆菌）。总体而言，该研究工作有望通过清洁生产柔性，独立式，金属离子配位的抗菌膜来扩大CNSL的利用范围，该抗菌膜可能应用于表面涂层，吸附和水净化。