Clean synthesis and characterization of green nanostructured polymeric thin films from endogenous Mg (II) ions coordinated methylolated-Cashew nutshell liquid. (20th November 2019)

• Record Type: Journal Article
• Authors: Zafar, Fahmina; Khan, Shabnam; Ghosal, Anujit; Azam, Mudsser; Sharmin, Eram; Rizwanul Haq, Qazi Mohd; Nishat, Nahid
• Is Part Of: Journal of cleaner production. Volume 238(2019)
• Publication Date: 2019-11-20
• Subjects: Agro by-product -- Cashew nut shell liquid -- Bio-coordination polymers -- Thin film -- TGA -- Antibacterial; Factory and trade waste -- Management -- Periodicals; Manufactures -- Environmental aspects -- Periodicals; Déchets industriels -- Gestion -- Périodiques; Usines -- Aspect de l'environnement -- Périodiques; 628.5
• DOI: 10.1016/j.jclepro.2019.117716
• Languages: English
• ISSNs: 0959-6526

Abstract

Abstract: 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. Graphical abstract: Image 1 Highlights: Cleaner production of cashew nut shell liquid, an agro byproduct based coordination polymer as flexible thin film. Via "solvent-free in-situ" Green approach. Displaying 3D array through stacking or interlacing of 1D nanorods of Mg(II)CNSL-FA. With good thermal stability, hydrophobicity and antibacterial activity against B. subtilis. Can be used as an antibacterial material.