Green Synthesis For Nonionic Surfactants From Poly (EthyleneTerphthalte) Plastic Waste

Efficient solvent free green glycolysis for polyethylene terephthalate plastic waste, in this respect, PET waste was subjected to depolymerization process with trimethylene glycol (1,3-propandiol) (1:3 w/w) in the presence of (1 % w/w) manganese acetate as trans esterification catalyst (1 % w/w), the product is Bis-(3-hydroxy-propyl)-terephthalate, BHPT, as a non-ionic surfactant was separated and characterized by FT-IR and (HNMR)-H-1. The surface properties were studied by measuring the surface tension at different concentrations and temperatures. The surface tension, critical micelle concentration (CMC), and surface activities were determined. The surface parameters such as surface excess concentration (r(max)), the area per molecule at interface (A(min))and the effectiveness of surface tension reduction (pi CMC ) were determined from the adsorption isotherms of the prepared surfactant. The thermodynamic data for the micellization and adsorption process were calculated and discussed.

Automated summary

In this study, an efficient solvent-free green glycolysis process was used to treat polyethylene terephthalate plastic waste, transforming it into Bis-(3-hydroxy-propyl)-terephthalate as a non-ionic surfactant. By measuring parameters such as surface tension and conducting thermodynamic calculations, the surface properties and adsorption process of the prepared surfactant were investigated.