Magnetic Inorganic Nanoparticles - Preparation Of Polymer Composites

Magnetic inorganic nanoparticles(includinga-Fe2O3, - Fe2O3, Fe3O4, Fe-Ni-B etc.) as a kind of magnetic materials have been attracting much attention both in industrial and science research. The preparation of nanoparticles with special performance using magnetic inorganic nanoparticles is currently attracting considerable attention. Recently, magnetic inorganic nanoparticles are mostly used to prepare magnetic composites. What makes inorganic/ polymer composites so attractive is their potential applications to medicine, biology-chemical and industrial etc. Recently, magnetic conducting polymer composites with both electrical and magnetic properties have received tremendous attention, and study on this kind of composites has becoming one of the most active and promising research fields. What makes inorganic/conducting polymer composites so attractive is their potential applications to batteries, electro-chemical display devices, molecular electronics, electro-magnetic shields, and microwave-absorbing materials, etc.In this paper, we first prepared ferrofluid with well stabilization using double layer surfactants, then prepared uniform magnetic polystyrene microspheres. Using CHCl3 as solvent and thiophene as monomer, we prepared Y -Fe2O3-FTP nanocomposites and Fe-Ni-B-PTP nanocomposites. The resulting nanocomposites were characterized by FTIR, XRD,TEM and Mossbauer.The main results are as follow:Using double layer surfactants to modify the magnetic nanoparticles ,we prepared ferrofluid with well stabilization. Then styrene polymerized and we prepared uniform magnetic polystyrene microspheres. The results of TEM, FTIR and XRD showed that the diameter was about 45 5nm.we prepared -Fe203-PTP nanocomposites using monomer polymerization method. FTIR, XRD,TEM and Mossbauer spectra proved that the encapsulating was successful and strong interaction happened between y -Fe2O3 and PTP. We also studied the conductivity of our nanocomposites, which showed that the conductivity of the composites is higher than pure polythiophene and the conductivity becomeshigher as the increasing of the γ -Fe2O3 content.Based on this experiment, we prepared Fe-Ni-B-polythiophene composites. FTIR, XRD, TEM and Mossbauer spectra proved that the encapsulating was successful. We also studied the conductivity of our nanocomposites, which showed that the conductivity of the composites was increased first and then decreased as the increasing of the γ-Fe2O3 content.Combining the literature and our experiments, we briefly analyze the polymerization of the three systems and design the simple model of the process.