Synthesis and characterization of bio-based polyurethane for potential applications as photocatalysts and anti-microbes

Abstract

Polyurethanes (PUs) are materials that are widely used in industry and daily life because of their versatility. The purpose of this work is to investigate the viability of producing bio-based polyurethane (PU) utilizing bio-based Salvia hispanica polyol (SHP) derived from Chia seed oil. Using, polymeric methylene diphenyl diisocyanate (PMDI), and water as a blowing agent, bio-based polyurethane powders were synthesized.Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), X-ray diffraction (XRD), and the thermogravimetric analysis (TGA) method are used to assess the properties of the synthesized bio-based   polyurethanes.Through the use of Fourier transform infrared (FTIR) spectroscopy, the molecular structure of PU was examined. The FTIR spectrum's NCO peak disappeared around 2270–2250 cm^–1, indicating that the diisocyanate had fully reacted to create PU. SEM analysis was used to examine the PU film's morphological characteristics. Both the photocatalytic and antimicrobial activity of bio-based PU show good results, indicating that the synthesized PU can be used as an alternative to synthetic polyurethane.