Abstract
Magnetic field sensitive gels, ferrogels are new promising class of hydrogels. The coupling of hydrogels and magnetic particles has potential application in soft actuators such as artificial muscles or for hyperthermia application. Here a composite of magnetite particles (Fe3O4) and poly(vinyl alcohol) (PVA) hydrogel is developed using gamma irradiation as a crosslinking agent. PVA and Fe3O4 were chosen because of their well-established biocompatibility, radiation crosslinking potential (PVA), mild magnetic properties and the Curie point near desired heating temperature range (Fe3O4). Physico-chemical characteristics of these systems show the effect of the presence of particles in the process of radiation-induced crosslinking. Obtained PVA/Fe3O4 ferrogel composite has greater swelling capacity, activation energy of dehydration and dehydration rate compared to PVA hydrogel, crosslinked under the same conditions.
Highlights
IntroductionFerrogels, are new promising class of hydrogels. The coupling of hydrogels and magnetic particles has potential application in soft actuators, such as artificial muscles, or for hyperthermia application
Magnetic field sensitive gels, ferrogels, are new promising class of hydrogels
It can be seen that the magnetic particles agglomerate, probably due to reduced stabilization ability of polymer network on the surface, as well as due to heating of system in consequence of energy absorption during gamma irradiation
Summary
Ferrogels, are new promising class of hydrogels. The coupling of hydrogels and magnetic particles has potential application in soft actuators, such as artificial muscles, or for hyperthermia application. PVA and Fe3O4 were chosen due to their well-established biocompatibility, radiation crosslinking potential (PVA), mild magnetic properties and the Curie point near desired heating temperature range (Fe3O4). The purpose of this work was to develop magnetically responsive polymer network based on composites of magnetic particles and hydrogels using gamma irradiation as a crosslinking agent, and to investigate its physico-chemical characteristics, such as swelling behavior and kinetics of dehydration of equilibrium swollen ferrogel. The feasibility of this idea was explored by using poly(vinyl alcohol) ferrogel system (PVA/Fe3O4). Short-lived reactive species are formed, mainly hydrated rogen ealteocmtrso(nHs)(:ea−q
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