Thermal Degradation Kinetics of Polyurethane/Magnetic Activated Carbon Derived from Orange-Peel/Fe۳O۴ Biocomposites

In present work, orange peel derived activated carbon (OPAC) /Fe۳O۴ loaded into polyurethane biocomposites were synthesized with different weight fractions of (OPAC)/Fe۳O۴ via, ۰.۵, ۱ and ۲ wt%  filler in the biocomposites. The physico – mechanical, thermal characteristics and magnetic properties  of fabricated (OPAC)/Fe۳O۴ filled biocomposites  have been measured by using DSC, TGA, DMA and VSM. A slight improvement in thermal stability was noticed for (OPAC)/Fe۳O۴ loaded biocomposites. The PU/(OPAC)/Fe۳O۴biocomposites are thermally stable up to ۲۵۰ºC and completely degraded above ۵۲۰ ºC. The biocomposites degradation kinetic parameters for each step of the thermal degradation processes have been studied using two mathematical models namely, Coats–Redfern and Broido's methods. The PU/(OPAC)Fe۳O۴ biocomposites showed high mechanical, magnetic, thermal properties at a low loading of ۲ wt.%, and could potentially be used for a wide range of applications.

کلیدواژه ها:

PU/(OPAC)/Fe۳O۴ ، biocomposite ، orange peel activated carbon ، Kinetic parameters