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Device for preparing magnetic nanoparticles through parallel high-temperature pyrolysis and application

A magnetic nanoparticle, high-temperature pyrolysis technology, applied in nanotechnology, ferrous oxides, inorganic chemistry, etc., can solve problems such as poor batch consistency, uneven heat and mass transfer, and uneven nanoparticle size. , to achieve uniform size, good product consistency, and ensure the consistency of reaction conditions.

Inactive Publication Date: 2017-05-31
NANJING NANOEAST BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of uneven heat and mass transfer, uneven size of nanoparticles and poor batch-to-batch consistency in the scale-up preparation of high-temperature pyrolysis

Method used

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  • Device for preparing magnetic nanoparticles through parallel high-temperature pyrolysis and application
  • Device for preparing magnetic nanoparticles through parallel high-temperature pyrolysis and application
  • Device for preparing magnetic nanoparticles through parallel high-temperature pyrolysis and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1, five 100mL parallel electric heating reactor devices to prepare manganese zinc ferrite magnetic nanoparticles

[0027] The preparation device consists of a 0.5L material mixing pretreatment electric heating reactor, 5 parallel electric heating programmed temperature reactors (0.1L) and a programmed temperature controller. The preparation process is as follows:

[0028] (1) Add 0.2L dioctyl ether to the material mixing pretreatment reactor, and continuously feed nitrogen to remove oxygen in the system; add 20mmol of iron acetylacetonate, 6mmol of manganese acetylacetonate, 4mmol of zinc acetylacetonate, and The ratio of oleic acid and oleylamine (respectively 10:2, 7:5, 5:7, the total amount is 120mmol) was heated to 110°C at a heating rate of 3°C / min by a programmed temperature control device under nitrogen gas feed conditions. ℃, to fully remove the lower boiling water and impurities in the solution, and at the same time make the acetylacetonate complex, ol...

Embodiment 2

[0032] Example 2, five 250mL parallel electric heating reactor devices to prepare zinc ferrite magnetic nanoparticles

[0033] The preparation device consists of a 1L material mixing pretreatment electric heating reactor, 5 parallel electric heating programmed temperature reactors (0.25L) and a programmed temperature rise controller. The preparation process is as follows:

[0034](1) Add 0.5L dibenzyl ether in the material mixing pretreatment reactor, and continuously feed nitrogen to remove oxygen in the system; add 180mmol iron acetylacetonate, 90mmol zinc acetylacetonate and 700mmol oleic acid, Under the conditions, the heating rate of 8°C / min is heated to 120°C by the program temperature control device to fully remove the water and impurities with lower boiling points in the solution, and at the same time, the acetylacetone complex, oleic acid, and oleylamine are completely mixed and kept The temperature is 1h.

[0035] (2) The materials that come out of the material mix...

Embodiment 3、10

[0038] Example 3, Ten 500mL Parallel Electric Heating Reactor Devices Prepare Ferroferric Oxide Magnetic Nanoparticles

[0039] The preparation device consists of a 5L material mixing pretreatment electric heating reactor, 10 parallel electric heating programmed temperature reactors (0.5L) and a programmed temperature rise controller. The preparation process is as follows:

[0040] (1) Add 2L dibenzyl ether in the material mixing pretreatment reactor, continue feeding nitrogen to remove the oxygen in the system; Add 300mmol of iron acetylacetonate and oleic acid and oleylamine of 10:2 molar ratio (total amount is 1200mmol), under the condition of feeding nitrogen, heated to 110°C by a programmed temperature control device at a heating rate of 3.3°C / min, so as to fully remove water and impurities with lower boiling points in the solution, and simultaneously make the acetylacetone complex and oleic acid, The oleylamine was mixed completely and kept at this temperature for 1h. ...

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Abstract

The invention discloses a device for preparing magnetic nanoparticles through parallel high-temperature pyrolysis and an application. The device comprises a material mixing pretreatment and electric heating reactor and multiple parallel electric heating and program heating reactors, and one program heating reactor controls reaction temperatures and time simultaneously. The device can be used for batch preparation of ferrite magnetic nanoparticles such as ferrosoferric oxide, zinc ferrite, manganese-zinc ferrite and the like with a high-temperature pyrolysis method. According to the method, the problems that the reaction temperature is too high with the high-temperature pyrolysis method, and heat and mass transfer is not uniform and non-uniform sizes of the nanoparticles are easily caused through direct size increasing preparation are successfully solved through multiple parallel reactors. Reaction materials are pretreated in a uniform manner and have the temperature controlled through the uniform program, so that the consistency of reaction conditions is guaranteed, and high-quality magnetic nanoparticles can be obtained.

Description

technical field [0001] The invention relates to a device for parallel high-temperature pyrolysis preparation of magnetic nanoparticles, belonging to the field of nanomaterial preparation. [0002] technical background [0003] Magnetic ferrite nanoparticles are a class of nanomaterials with special functions. Due to its special physical and chemical properties (such as small size effect, surface effect, etc.), magnetic properties (such as superparamagnetism) and good biocompatibility, it is widely used in biomedical magnetic resonance imaging, tumor magnetic induction hyperthermia, magnetic Targeted drug carriers, separation of cells and biomolecules, and biosensing and detection have a wide range of applications. [0004] Generally speaking, biomedicine and other fields have strict requirements on the physical and chemical properties of magnetic nanostructures, such as chemical composition, particle size, morphology, crystal structure, magnetic properties, uniformity and di...

Claims

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Application Information

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IPC IPC(8): C01G49/00C01G49/08B82Y40/00
CPCC01G49/009C01G49/0063C01G49/08C01P2004/03C01P2004/64
Inventor 张宇武昊安陈艳华
Owner NANJING NANOEAST BIOTECH
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