Novel cardanol based bio-polyols for sustainable construction applications

Abstract

The coating industry may comply with new safety rules by using more environmentally friendly and harmless alternative materials. The present study intends to investigate the characteristic of agricultural waste material-based bio-polyol derived polyurethane wood protective coating for building and construction applications. This study covers the synthesis and characterization of cardanol based bio-polyol through dual epoxidation of phenolic -OH and terminal unsaturation to generate monoglycidyl ether of cardanol followed by ring opening reaction. The resultant bio-polyol is used for formulation of polyurethanes using aliphatic (Desmodur N75) and aromatic (Desmodur L75) isocyanates. The formulated polyurethanes employed for sustainable wood protective coating as well as architectural and multitudinous applications with enhanced antibacterial activity. The resultant wood protective coating was characterized by attenuated total reflectance-fourier transform infrared spectroscopy (ATR-FTIR), mass spectroscopy, 1H NMR, thermogravimetric analysis (TGA), surface morphology, mechanical and antibacterial properties.