Preparation and performance study of a reactive polyurethane hot-melt adhesive/CS–Fe(3)O(4) magnetic nanocomposite film/fabric

Magnetic nanoparticles are attracting significant attention for their wide application as biomaterials and magnetic storage materials. As an environmentally friendly adhesive, reactive polyurethane hot-melt adhesive (PUR) is a biocompatible polymer with a wide range of applications. In this paper, chitosan (CS)-surface-modified magnetic Fe(3)O(4) nanoparticles were synthesized by the sol–gel method. Surface modification of the Fe(3)O(4) nanoparticles with CS enhanced their mechanical properties in PUR. The nanoparticles were characterized by Fourier transform infrared (FTIR) and X-ray diffraction (XRD) analyses, while their surface morphology was elucidated using scanning electron microscopy (SEM) and projection electron microscopy (TEM) techniques. Subsequently, PUR/CS–Fe(3)O(4) magnetic nanocomposite films were prepared using an in situ method, wherein different amounts of CS–surface-modified magnetic Fe(3)O(4) nanoparticles were doped into the PUR and coated on the films. The thermal, UV resistance and mechanical properties of the PUR/CS–Fe(3)O(4) magnetic nanocomposite films were investigated by TGA, UV spectrometer and tensile testing. CS–Fe(3)O(4) nanoparticles were successfully prepared using the sol–gel method and CS to modify the surface of the Fe(3)O(4) nanoparticles. The results show that the mechanical properties and UV resistance of PUR/CS–Fe(3)O(4) magnetic nanocomposites are improved by almost 50%, so the constructed PUR/CS–Fe(3)O(4) magnetic nanocomposites have good UV-resistant properties and mechanical properties. The as-synthesized CS–Fe(3)O(4) magnetic nanocomposites show great potential for application to mechanical and textile development.