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Preparation of cobalt nickel ferrite/ polyvinyl pyrrolidone composite magnetic nano fibers

A polyvinylpyrrolidone, cobalt-nickel ferrite technology, which is applied in the directions of fiber treatment, fibrous filler, fiber chemical characteristics, etc., can solve the problems of poor dispersion and uneven fiber diameter distribution, and achieves simple process and uniform diameter distribution. , The effect of low production equipment requirements

Inactive Publication Date: 2011-11-23
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the preparation of ferrite magnetic particle nanofibers by electrospinning technology mainly has the following difficulties: the ferrite particles are easy to settle in the polymer solution, resulting in poor dispersion, which directly leads to uneven distribution of fiber diameters

Method used

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  • Preparation of cobalt nickel ferrite/ polyvinyl pyrrolidone composite magnetic nano fibers
  • Preparation of cobalt nickel ferrite/ polyvinyl pyrrolidone composite magnetic nano fibers
  • Preparation of cobalt nickel ferrite/ polyvinyl pyrrolidone composite magnetic nano fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Weigh 1.35g Co 1-x Ni x Fe 2 o 4 (x=0.2) particles, dispersed in 18ml of toluene solution, mechanically ultrasonically stirred at 600 rpm at room temperature for 1h, then added dropwise 3.6ml of silane coupling agent KH-570 (brand A-174) under nitrogen atmosphere, Mechanically ultrasonically stir at 300 rpm / min for 6 h at room temperature, collect the product with a magnet, wash with dichloromethane and ethanol, and bake at 50°C for 18 h to obtain the modified Co 0.8 Ni 0.2 Fe 2 o 4 nanoparticles;

[0032] (2) Weigh 0.45g of PVP (30000) and dissolve it in 5.2ml of ethanol, mechanically ultrasonically stir at 600 rpm at room temperature for 12h, and disperse 1.35g of modified cobalt-nickel ferrite particles in the PVP solution to make the ferrite The mass ratio of particles to PVP was 3:1, mechanical ultrasonic stirring at 600 rpm at room temperature for 12 hours, the mixed solution was injected into a plastic syringe, fixed on a microfluidic pump, at a propul...

Embodiment 2

[0036] (1) Weigh 1.6g Co 1-x Ni x Fe 2 o 4 (x=0.6) particles, dispersed in 25ml of toluene solution, mechanically ultrasonically stirred at 300 rpm at room temperature for 2h, then added dropwise 1.75ml of silane coupling agent KH-570 (brand name SH-6030) under nitrogen atmosphere, Mechanically ultrasonically stir at 600 rpm at room temperature for 4 hours, collect the product with a magnet, wash with dichloromethane and ethanol, and bake at 40°C for 24 hours to obtain the modified Co 0.4 Ni 0.6 Fe 2 o 4 Nanoparticles; The Fourier transform infrared spectrum of the modified ferrite particles shows that the silane coupling agent KH-570 has been grafted on the surface of the magnetic particles.

[0037] (2) Weigh 0.4g of PVP (100000) and dissolve it in 5.8ml of ethanol, mechanically ultrasonically stir at 400 rpm at room temperature for 18h, and disperse 1.6g of modified cobalt-nickel ferrite particles in the PVP solution to make the ferrite The mass ratio of particles to...

Embodiment 3

[0040] (1) Weigh 1.0g Co 1-x Ni x Fe 2 o 4 (x=0.4) particles, dispersed in 20ml of toluene solution, mechanically ultrasonically stirred at 400 rpm at room temperature for 1.5h, then added dropwise 2.0ml of silane coupling agent KH-570 (brand name KBM-503) under nitrogen atmosphere , mechanically ultrasonically stirred at 400 rpm / min at room temperature for 5 hours, collected the product with a magnet, washed with dichloromethane and ethanol, and baked at 60°C for 12 hours to obtain the modified Co 0.4 Ni 0.6 Fe 2 o 4 Nanoparticles; The Fourier transform infrared spectrum of the modified ferrite particles shows that the silane coupling agent KH-570 has been grafted on the surface of the magnetic particles.

[0041] (2) Weigh 0.5g of PVP (1300000) and dissolve it in 6.4ml of ethanol, mechanically ultrasonically stir at 600 rpm at room temperature for 12h, and disperse 1.0g of modified cobalt-nickel ferrite particles in the PVP solution to make the ferrite The mass ratio ...

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Abstract

The invention relates to a preparation method of cobalt nickel ferrite / polyvinyl pyrrolidone (PVP) composite magnetic nano fibers. The preparation method comprises the following steps of: (1) preparing modified Co1-xNixFe2O4 nano particles; and (2) preparing PVP ethanol solution, uniformly dispersing the modified Co1-xNixFe2O4 nano particles obtained in the step (1) into the PVP ethanol solution, stirring the solution for 12 to 24 hours to obtain Co1-xNixFe2O4 / PVP mixed solution, and performing electrostatic spinning by using the Co1-xNixFe2O4 / PVP mixed solution as spinning stock solution to obtain the cobalt nickel ferrite / PVP composite magnetic nano fibers. The preparation method is simple, can effectively improve the dispersibility of the magnetic particles in the polymer solution,has low requirement for production equipment, and is easy to realize industrialized production; and the diameter of the prepared magnetic fibers is distributed uniformly and in a range of 300 to 500 nanometers, and the magnetic fibers have good magnetic performance.

Description

technical field [0001] The invention belongs to the field of preparation of nanometer magnetic fibers, in particular to a preparation method of cobalt-nickel ferrite / polyvinylpyrrolidone composite magnetic nanofibers. Background technique [0002] Nanofiber refers to a wire (tube) material that is two-dimensional in nanometer size in three-dimensional space, and usually has a diameter or tube diameter of nanoscale and a large length. The biggest feature of nanofibers is their large specific surface area, which leads to a great improvement in their surface energy and surface activity compared with zero-dimensional nanomaterials, and thus has excellent chemical and physical properties. Due to these excellent properties, nanofibrous materials have become the frontier of new material research. Magnetic nanoparticles have unique structures and magnetic properties, and have broad application prospects in many fields such as biology, medicine, and environmental protection. The no...

Claims

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Application Information

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IPC IPC(8): D01F6/56D01F1/10D01D5/00C09C3/12C09C1/24
Inventor 李耀刚唐亚王宏志张青红
Owner DONGHUA UNIV
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