The Preparation Of Graphite Nanosheets/magnetite Composite And Its Self-assembly Behaviors Under Magnetic Field

Graphite nanosheets prepared by the intercalated and expanded method have the high conductivity and surface area, thus entrusted it with the good electromagnetic shielding performance. According to Schelkoff's electromagnetic shielding theory, electromagnetic shielding materials with good electromagnetic shielding performance should have higher relative conductivity and relative magnetic conductivity. Graphite nanosheets itself are anti-ferromagnetic, in order to further strengthens the shielding properties of graphite nanosheets, we hope coat some magnetic particle to the surface of graphite nanosheets to enhance the magnetic performance of graphite nanosheets.Taking the Fe and Fe mixing solution as coating premonitory solution, magnetite particles with ferromagnetism were coated to the surface of graphite nanosheets by the wet-chemical co-precipitation method. In a detailed study of four main impact factors during the forming and coating process of magnetite particles: the total concentration of iron ions, the ratio of Fe²⁺/Fe³⁺, the crystallization temperature and the reaction time, the optimum preparation condition of graphite nanosheets/magnetite compound powder were obtained through researching the effect of these factors on the phase composition, magnetic...