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A kind of anti-corrosion magnetic nano material with sustained release effect and preparation method thereof

A magnetic nanometer technology, applied in the preparation of microspheres, microcapsule preparations, etc., can solve the problems of complex preparation method and single function, and achieve the effect of simple and controllable method, widening application scope and easy promotion.

Active Publication Date: 2016-08-17
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current corrosion inhibitor carrier, in addition to the loading function, has a relatively single function, and the preparation method is relatively complicated

Method used

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  • A kind of anti-corrosion magnetic nano material with sustained release effect and preparation method thereof
  • A kind of anti-corrosion magnetic nano material with sustained release effect and preparation method thereof
  • A kind of anti-corrosion magnetic nano material with sustained release effect and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] FeCl 3 ·6H 2 O(2mmol), CoCl 2 ·6H 2 Add O (1mmol) and sodium acetate (26mmol) into a mixed solvent of 10mL ethylene glycol and 20mL diethylene glycol, stir in a water bath at 40°C for 1.5h, and transfer the obtained solution into a hydrothermal reaction kettle after fully dissolving , the temperature was raised to 200°C, and after 3 hours of reaction, it was cooled to room temperature. Magnetic separation, pouring off the waste liquid, washing with absolute ethanol and deionized water, until the magnetic suction clear liquid is colorless, and drying to obtain CoFe with a particle size of about 20-100nm 2 o 4 magnetic nanospheres. It is characterized by XRD: the positions of the main diffraction peaks are all the same as those of CoFe2 o 4 Corresponding to the standard spectrum, it is CoFe 2 o 4 magnetic nanospheres.

[0034] 0.1g CoFe 2 o 4 Magnetic nanospheres were mixed with 20 mL of branched polyethyleneimine (PEI) aqueous solution with a molecular weight ...

Embodiment 2

[0040] FeCl 3 ·6H 2 O(2mmol), CoCl 2 ·6H 2 Add O (1mmol) and sodium acetate (40mmol) into a mixed solvent of 15mL ethylene glycol and 30mL diethylene glycol, stir in a water bath at 50°C for 1h, and transfer the obtained solution into a hydrothermal reaction kettle after fully dissolving , the temperature was raised to 220°C, and after 5 hours of reaction, it was cooled to room temperature. Magnetic separation, pouring off the waste liquid, washing with absolute ethanol and deionized water, until the magnetic suction clear liquid is colorless, and drying to obtain CoFe with a particle size of about 200nm 2 o 4 magnetic nanospheres. It is characterized by XRD, the results are shown in Image 6 , the result surface: the positions of the main diffraction peaks are the same as those of CoFe 2 o 4 Corresponding to the standard spectrum, it is CoFe 2 o 4 magnetic nanospheres.

[0041] 0.1g CoFe 2 o 4 Mix magnetic nanospheres with 20mL of PEI aqueous solution with a conc...

Embodiment 3

[0045] FeCl 3 ·6H 2 O(2mmol), FeCl 2 4H 2 Add O (1mmol) and sodium acetate (60mmol) into a mixed solvent of 20mL ethylene glycol and 40mL diethylene glycol, stir in a water bath at 70°C for 0.5h, fully dissolve and transfer the resulting solution into a hydrothermal reaction kettle , the temperature was raised to 200°C, and after 12 hours of reaction, it was cooled to room temperature. Magnetic separation, pouring off the waste liquid, washing with absolute ethanol and deionized water, until the magnetic suction clear liquid is colorless, and drying to obtain Fe with a particle size of 500nm 3 o 4 magnetic nanospheres. It is characterized by XRD, the results are shown in Figure 7 , the results show that the positions of the main diffraction peaks are all the same as those of Fe 3 o 4 Corresponding to the standard spectrum, it is Fe 3 o 4 magnetic nanospheres. 0.1g Fe 3 o 4 Magnetic nanospheres were mixed with 20 mL of PEI aqueous solution with a concentration of ...

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Abstract

The invention relates to an anti-corrosion magnetic nano material with sustained release effect and a preparation method thereof. The nano material is a microsphere with a particle diameter of 20-500nm, including ferric acid with a loose porous structure located in the inner layer of the anti-corrosion magnetic nano material Cobalt or ferroferric oxide magnetic nanometer spheres and a corrosion inhibitor loaded in the outer surface layer and internal holes of the magnetic nanometer spheres. The magnetic nano-microspheres are loaded with corrosion inhibitors through electrostatic bonding, and have a loose porous structure. In a corrosive environment, due to the presence of a large number of ions, the electrostatic bonding between the corrosion inhibitors and the magnetic nano-microspheres is broken so that the corrosion inhibitor It is gradually released or exposed on the metal surface, and combines with metal ions to form a chelate, forming a dense protective film on the metal surface to achieve long-term anti-corrosion effect on the metal.

Description

technical field [0001] The invention belongs to the field of preparation of composite magnetic nanometer microspheres, in particular to a slow-release anticorrosion magnetic nanometer material and a preparation method thereof. Background technique [0002] Corrosion inhibitor is an anti-corrosion chemical that can inhibit or slow down the corrosion rate of metals in corrosive media. Its dosage is very small, and it has a certain protective effect on metals in corrosive environments without affecting the properties of media and metals. Corrosion inhibitors are generally adsorbed on the metal surface through physical or chemical action to form a dense protective film, thereby preventing the contact between the metal and the corrosive medium, and achieving a protective effect on the metal. It has a wide range of applications in industrial production and social life. . Currently commonly used corrosion inhibitors include inorganic corrosion inhibitors and organic corrosion inhi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F11/00B01J13/02
Inventor 董丽杰郭毅宋少坤张勐勐陆志伟
Owner WUHAN UNIV OF TECH
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