Thermoresponsive shape memory polymer based on graphene oxide /poly(e-caprolactone) nanocomposites

In this study, we prepared a thermoresponsive shape-memory polymer nanocomposites based on graphene oxide/ poly(e-caprolactone) (GO/PCL). Chemical cross-linking of GO by PCL in the presence of hexamethylene diisocyanate (HDI) were studied. By changing the PCL precursor (PCL-HDI) molecular weight, the crystallization and melting temperatures of semi-crystalline networks were systematically altered. The nanocomposite network was fully characterized, including the microstructure, cross-link density, crystallinity, thermal properties, and thermo mechanical properties. The thermo-mechanical properties as well as shape memory properties in GO/PCL network were studied. The resulting GO/PCL nanocomposites exhibited excellent thermo-induced shape-memory effects close to body temperature. Therefore, these thermoresponsive shape-memory nanocomposites could be potentially developed into a new smart biomaterial.

کلیدواژه ها:

poly (e-caprolactone) ، graphene oxide ، shape memory polymers ، biomaterials