magnetic fe 3 o 4 Preparation method of @ppy composite nanomaterial

Abstract

The invention discloses a magnetic Fe 3 o 4 The preparation method of @PPy composite nanomaterials, the preparation method includes the following steps: the inorganic salt electrolyte, Fe 3 o 4 Nanoparticles and pyrrole are dispersed in a blend of distilled water and alcohol solvents, and stirred evenly to obtain a reaction solution; then the reaction solution is treated by a constant current electrolysis method to obtain a mixed solution; then the obtained mixed solution is sequentially filtered and washed; Finally, dry the washed solid particles to obtain magnetic Fe 3 o 4 @PPy Composite nanomaterials. In the present invention, Fe 3 o 4 The surface of the core nanoparticles is covered with a dense PPy layer, which greatly enhances the aggregation resistance and inorganic acid corrosion resistance of the nanoparticles in the aqueous phase system, and exhibits excellent superparamagnetism.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a magnetic Fe 3 o 4 Preparation methods of @PPy composite nanomaterials. Background technique [0002] Magnetic composite materials are favored by researchers because of their special properties compared with general materials, and their special properties in chemistry and physics have attracted wide attention. Due to the existence of magnetism, nano-magnetic composite materials are mainly manifested in superparamagnetism, magnetic susceptibility and high coercive force. while Fe 3 o 4 Magnetic micro-nano materials are prone to coagulation, because of the magnetic attraction and van der Waals force between them, and the poor oxidation resistance of ferroferric oxide colloidal solution, it is easy to be oxidized by air to form γ-Fe 2 o 3 particles, further leading to Fe 3 o 4 Aggregation and precipitation of magnetic micro-nanomaterials. [0003] There are many methods fo...

AI Technical Summary

Problems solved by technology

The advantage of the sol-gel method to prepare nano-magnetic composite materials is that the reaction is easy to carry out and has a low synthesis temperature. The disadvantage is that there will inevitably be a large number of pores in the gel, and many harmful gases and organic substances will escape during the drying process. It will have varying degrees of impact on the compactness and stability of the material

The advantage of the electrochemical synthesis method is that it has a high degree of selectivity and can produce many compounds that are difficult to synthesize by ordinary methods. The disadvantage is that it cannot be mass-produced on a large scale and the coating rate of the obtained product is very low, and the acid resistance needs to be improved; The operation of the in-situ polymerization method is simple, but the disadvantage is that the quality of the obtained products is not easy to control, and it is easy to form nano-colloids and change the particle size of the nanoparticles, resulting in the aggregation of the solution. In addition, it needs to consume a lot of water, resulting in a waste of water resources. and recycling