2024

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Synthesis and characterization of sustainable polyurethane-amide (PUA)-organoclay bio-nanocomposites for enhanced protective coatings
(Elsevier B.V., 2024) Anjum A.; Kashif M.; Aalam J.; Iqbal S.; Singh J.; Mukherjee M.D.
An effort has been made to synthesize sustainable polyurethane-amide (PUA) organoclay by incorporating natural materials. Polyol derived from castor oil, toluene diisocyanate (TDI), and cetyl pyridinium chloride (CPC) modified Montmorillonite (Mt) clay have been used in this purpose. The modification of Mt clay with CPC serves a dual purpose by increasing the D-spacing between clay layers and enhancing the compatibility of clay with organic polymers. The investigations included varying the percentage of TDI at three different levels to assess its impact on the physical, mechanical and corrosion resistance characteristics of bio-nanocomposite. The presence of characteristics C�H bonds at 2854 cm?1 (sym. ?CH2) and 2928 cm?1 (asym. ?CH2�) in CMC are absent in Mt, confirming formation of CPC modified Mt clay (CMC). Structural investigations of nanobiocomposites were done by Scanning electron microscopy and X-ray diffraction studies and TGA analysis. The findings suggest that the synthesized bio-nanocomposites could serve as a novel and environmentally friendly material for protective coatings. � 2024 Elsevier B.V.