Optimization on magnetic properties of Nd-doped Fe3O4 nanoparticles for magnetic shielding fabrics

High magnetic protective fabrics with rare earth Nd doped Fe 3 O 4 nanoparticles were fabricated via a grafting method. The structure, crystal form, and elemental composition of nanoparticles were investigated by transmission electron microscopy, energy dispersive X-ray, X-ray powder diffraction, and X-ray photoelectron spectroscopy. The obtained NdFe 2 O 4 nanoparticles show spherical shape with fine dispersion and reasonable element composition. However, they demonstrate fine superparamagnetic properties with a magnetic saturation value of 29.25 A m 2 /g and low coercivity of 1.902 mT through the vibrating sample magnetometry technique, which can be well developed in magnetic shielding protective applications. Then, the cotton fabrics with plain weave were finished by a proofing rapier loom as a carrier. The NdFe 2 O 4 nanoparticles underwent some appropriate surface modification and then were grafted onto the cotton fabrics by a bridge agent of N , N ′-dissuccinimidyl carbonate. The morphology, structure, dispersion effect, and electromagnetic protective properties of the fabrics were observed through scanning electron microscopy, Fourier infrared spectroscopy, thermogravimetric analysis-differential scanning calorimetry (TG-DSC), and a vector network analyzer. The reliable fabrics with grafting reaction on the interface are expected to have potential applications in the field of electromagnetic protection and biomedicine fields.