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Magnetic nano stirrer prepared through electrostatic spinning technology and preparation method and application thereof

An electrospinning technology and a stirrer technology, applied in the field of preparing magnetic nano-stirrers, can solve the problems of inability to achieve rapid mass production, and achieve good acid and alkali resistance

Active Publication Date: 2020-09-22
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem solved by the present invention is that the reported magnetic nano-stirrer is only assembled in the solution and cannot be rapidly prepared in large quantities. Therefore, a brand-new idea and method are proposed to prepare the magnetic nano-stirrer. The particles prepared by the present invention are oriented along the fiber The material not only has strong magnetism, but also can be rotated under the induction of a magnetic field after being broken, so as to achieve the purpose of stirring in the solution, it can better meet the needs of the stirrer in the micro-droplet system and microfluidic pipelines of different scales. to stir

Method used

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  • Magnetic nano stirrer prepared through electrostatic spinning technology and preparation method and application thereof
  • Magnetic nano stirrer prepared through electrostatic spinning technology and preparation method and application thereof
  • Magnetic nano stirrer prepared through electrostatic spinning technology and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] When the iron acetylacetonate high splitting method is used to synthesize larger 45nm particles, the stirring effect is increased.

[0086] 1. Take 1ml of synthesized 45nm Fe 3 o 4 The magnetic nanoparticles were added to the PAN (13wt%) spinning solution, ultrasonically oscillated for 10 minutes, and vortex was rotated and mixed for 20 minutes. Wherein, the preparation method of PAN spinning solution is the same as that of Comparative Example 1.

[0087] 45 nm magnetic nanoparticles were synthesized as follows: Iron(III) acetylacetonate (0.706 g, 2 mM) was added to a mixture of oleic acid (1.129 g, 4 mM) and benzyl ether (15.6 g, 10 mL). The mixture solution was degassed at room temperature for 1 hour. The solution was then heated to 290°C at a rate of 20°C / min under vigorous magnetic stirring. It should be noted that the stirring speed should be fast to prevent the magnetic interaction between the magnetic nanoparticles and the interaction with the stirrer to caus...

Embodiment 2

[0092] When the particle size increases to 80nm, a single particle arrangement can be achieved. Since the ligands on the surface of the particles were not treated, the distance between the particles was too large and the arrangement was not tight.

[0093] 1. Take 1ml of synthesized 80nm Fe 3 o 4 The magnetic nanoparticles were added to the PAN (13wt%) spinning solution, ultrasonically oscillated for 10 minutes, and vortex was rotated and mixed for 20 minutes. Wherein, the preparation method of PAN spinning solution is the same as that of Comparative Example 1.

[0094] 80 nm magnetic nanoparticles were synthesized as follows: Iron(III) acetylacetonate (0.706 g, 2 mM) was added to a mixture of oleic acid (1.129 g, 4 mM) and benzyl ether (10.40 g, 10 mL). The mixture solution was degassed at room temperature for 1 hour. The solution was then heated to 290°C at a rate of 15°C / min under vigorous magnetic stirring. It should be noted that the stirring speed should be fast to ...

Embodiment 3

[0099] Using 110nm large particles, after the surface ligand washing treatment, the nanoparticles are closely arranged along the fiber axis, the stirring effect is obvious, and the effective stirring distance is the largest.

[0100] 1. Take 100ml synthesized 110nm Fe 3 o 4 The magnetic nanoparticles were added to the PAN (13wt%) spinning solution, ultrasonically oscillated for 10 minutes, and vortex was rotated and mixed for 20 minutes. Wherein, the preparation method of PAN spinning solution is the same as that of Comparative Example 1.

[0101] 110 nm magnetic nanoparticles were synthesized as follows: Iron(III) acetylacetonate (0.706 g, 2 mM) was added to a mixture of oleic acid (1.129 g, 4 mM) and benzyl ether (5.2 g, 10 mL). The mixture solution was degassed at room temperature for 1 hour. The solution was then heated to 290°C at a rate of 15°C / min under vigorous magnetic stirring. It should be noted that the stirring speed should be fast to prevent the magnetic inte...

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Abstract

The invention relates to a magnetic nano stirrer prepared by using an electrostatic spinning technology and a preparation method and application thereof and belongs to the field of preparation of functional nano materials. An oleic acid cracking method is adopted for synthesis of different particle diameters and sizes of Fe3O4 magnetic nano particles, through a series of pretreatment, the particles are transferred to a PAN high-molecular polymer solution, after even stirring and mixing are performed, the mixture is sprayed into a water bath cylinder through electrostatic spinning, and an ultrasonic probe is inserted into the water bath cylinder for breaking nano filters, thereby obtaining the nano stirrer. The method uses the electrostatic spinning to array and wrap the magnetic nano particles at one step, is easy to implement and short in production cycle, and easily achieves continuous production. The prepared stirrer has good magnetic property and stirring performance. The magneticnano stirrer is adjustable in size, suitable for stirring in microfluidic pipes different in diameter and micro-droplets and thus has good application prospects in the fields such as micro reactions.

Description

technical field [0001] The invention relates to a magnetic nano-stirrer prepared by electrospinning technology, belonging to the field of nano-synthesis and manufacturing / organic-inorganic nano-composite materials. Background technique [0002] Stirring is the most basic chemical operation. Basically all chemical reactions require stirring to achieve uniform mixing of reactants. For solutions with small volumes, such as microdroplets or microfluidic systems, it becomes difficult to achieve effective stirring. It is often necessary to introduce a smaller size stirring bar to achieve the purpose of rapid mixing of liquids. [0003] At present, the preparation of magnetic nanostirrers adopts the method of magnetic field-induced self-assembly in solution, and the method of magnetic field-induced self-assembly in solution is to self-assemble magnetic nanoparticles into magnetic chains in solution under the induction of an external magnetic field, ( to assemble In the process, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/54D01F1/10D01D5/00C01G49/08B82Y30/00B82Y40/00B01F13/08
CPCD01F6/54D01F1/10D01D5/003C01G49/08B82Y30/00B82Y40/00C01P2004/64C01P2004/62B01F33/452
Inventor 刘雪洋陈虹宇计巧珍胡婷李博
Owner NANJING UNIV OF TECH
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