OPTIMISATION DE LA SYNTHESE D’UN BIOPOLYOL ET SON UTILISATIONS

Abstract

This study explores the production of biopolyols from used cooking oil using two methods: epoxidation followed by hydroxylation, and direct one-pot hydroxylation. A factorial experimental design was set up to optimize production conditions, enabling several types of biopolyols to be synthesized and evaluated. Among the experiments carried out, the 8th experiment, with all factors at maximum level, was identified as the optimum with a yield of 79.5% and the following physico-chemical characteristics: IOH= 231.010 mg KOH/g, II = 5.2525 g I2/100 g, IR = 1.4783, D = 0.9609 g/cm³, and pH = 6. The structure and composition of the biopolyols were confirmed by Fourier transform infrared spectroscopy (FTIR). In addition, an environmental balance of 72% was achieved, underlining our commitment to green chemistry. The biopolyols produced (the whole range) with different hydroxyl numbers can be used to manufacture polyurethane foams with different properties and uses, as well as cleaning and surface treatment products, demonstrating their potential to replace conventional products of fossil origin and thus contributing to a more sustainable chemical industry.