چكيده به لاتين
Nowadays, nanocomposites are considered due to their special importance and applications. In the manufacture of nanocomposites, the type of particles and polymer substrate is effective in the properties of nanocomposites. Various applications of nanocomposites include drug delivery in the medical industry, biosensors and solar cells, and more. Nanocomposites with magnetic nanoparticles are one of the attractive types of nanocomposites with the applications of which include a compact field responsive and electromagnetic shielding. The aim of this study is to design and manufacture biocompatible nanocomposites with magnetic nanoparticles in the presence of a magnetic field. In this research, with synthesizing Fe3O4 nanoparticles in various polymeric matrices, in the presence of an external magnetic field in one case and in the absence of an external magnetic field in another case, the magnetic features of obtained nanocomposites are investigated. The composites are used in this study, are bentonite, agar and PEO biocompatible composites. SEM analysis of powders shows the dispersion of magnetic nanoparticles in a polymeric matrix. Also, VSM analysis for bentonite and agar samples showed that with exposing the samples in an external magnetic field, the magnetic saturation is increased. Furthermore, for the sample Bentonite/Fe3O4, with applying an external magnetic field, for the samples 0.5 mg/ml and 2 mg/ml, an increase of 100% and 150% in SLP is obtained respectively.
