Heat and moisture management in membranes containing magnetic field-induced oriented nanosurfaces

Abstract

ABSTRACTThis work investigates how the orientation of graphene oxide (GO) and reduced graphene oxide (rGO) affect the moisture and heat transfer of poly acryl amide membranes. In so doing, iron oxide (Fe3O4) nanoparticles were deposited onto synthesized GO and rGO using the solvothermal method. Magnetic nanosheets were drawn to the through–plane direction of the prepared membranes by applying a magnetic field for different time lengths on the solution during casting. Fourier transform infra-red spectroscopy, X-ray diffraction, transmission electron microscopy (SEM), water vapor permeability (WVP), and dynamic heat transfer simulation apparatus were performed to detect the structures and characteristics of the nanosheets and membranes. The SEM confirmed the orientation of nanosheets in the magnetic field. The oriented polyacrylamide (PAAm)/mrGO membranes showed a higher transient temperature and WVP compared to the membranes with oriented and random GO. With an increase in the duration of the application of the magnetic field, the results of the above-mentioned tests improve. The oriented PAAm/mrGO membranes can have applications in wound dressing and protective clothing.