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

A composite nanomaterial and magnetic technology, applied in the field of polymer materials, can solve the problems of solution aggregation, influence of material compactness and stability, poor control of product quality, etc., to achieve enhanced anti-aggregation and inorganic acid corrosion resistance, Excellent physical and chemical properties, excellent superparamagnetic effect

Active Publication Date: 2019-07-16
JIANGHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Magnetic Fe of the present invention 3 o 4 The preparation method of @PPy composite nanomaterials comprises the following steps:

[0030] (1) NaCl (0.01mmol), Fe 3 o 4 Nanoparticles (1.0mmol) and pyrrole (1.0mmol) were dispersed in a blend of distilled water (0.01mmol) and ethanol (0.01mmol), and stirred evenly to obtain a reaction solution. The speed of ultrasonic stirring was 1000rpm, and the stirring time was 5min;

[0031] (2) The reaction solution was treated by constant current electrolysis, with 1.0mA cm -2 Treat the mixture system for 30 minutes under the reaction conditions of 50°C;

[0032] (3) The resulting dispersion system is then filtered, and the filtrate is washed with distilled water several times;

[0033] (4) Put the filtered solid particles in an oven and dry them at 70°C for 24 hours, and they will be Fe after taking them out. 3 o 4 Composite nanomaterials of @PPy, see the examples for the specific process figure 1, the method is pollution-f...

Embodiment 2

[0035] Magnetic Fe of the present invention 3 o 4 The preparation method of @PPy composite nanomaterials comprises the following steps:

[0036] (1) Na 2 SO 4 (0.1mmol), Fe 3 o 4 Nanoparticles (1.0mmol) and pyrrole (0.1mmol) were dispersed in distilled water (0.1mmol) and ethanol (0.01mmol), stirred evenly to obtain a reaction solution, the speed of mechanical stirring was 5000rpm, and the stirring time was 150min;

[0037] (2) The reaction solution was treated by constant current electrolysis, with 0.1mA cm -2 Treat the mixture system for 300min under the reaction condition of 60℃;

[0038] (3) The resulting dispersion system is then filtered, and the filtrate is washed with distilled water several times;

[0039] (4) Put the filtered solid particles in an oven and dry them at 50°C for 36 hours. After taking them out, they will be Fe 3 o 4 @PPy's Composite Nanomaterials. Gained product is carried out infrared spectrum test, and its result sees figure 2 . From f...

Embodiment 3

[0041] Magnetic Fe of the present invention 3 o 4 The preparation method of @PPy composite nanomaterials comprises the following steps:

[0042] (1) NaCl (0.07mmol), Fe 3 o 4 Nanoparticles (1mmol) and pyrrole (0.5mmol) were dispersed in distilled water (0.07mmol) and isopropanol (0.07mmol), stirred evenly to obtain a reaction solution, the speed of ultrasonic stirring was 500rpm, and the stirring time was 15min;

[0043] (2) The reaction solution was treated by constant current electrolysis, with 3.0mA cm -2 Treat the mixture system for 10 minutes under the reaction condition of 50℃;

[0044] (3) The resulting dispersion system is then filtered, and the filtrate is washed with distilled water several times;

[0045] (4) Put the filtered solid particles in an oven and dry them at 70°C for 24 hours, and they will be Fe after taking them out. 3 o 4 @PPy's Composite Nanomaterials.

[0046] The product was subjected to TEM and STEM-energy dispersive spectrometry to characte...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/00H01F41/00C25D9/02C25D5/54
CPCC25D5/54C25D7/006C25D9/02H01F1/0018H01F1/0054
Inventor 汤舜兰倩赵金星程琦刘畅梁济元闫继曹元成
Owner JIANGHAN UNIVERSITY
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