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Preparation method and product of ferromagnetic nanowire

A ferromagnetic nanowire and ferromagnetic technology, applied in the field of preparation of ferromagnetic nanowires, can solve the problems of limited aspect ratio of iron nanowires and slow dropping process, and achieve good orientation, controllable process and synthetic route. simple effect

Active Publication Date: 2018-12-07
重庆天渝新材料技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The whole process is carried out at room temperature, the synthesis route is simple, but the dropwise addition process is slow, and the aspect ratio of the prepared iron nanowires is limited

Method used

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  • Preparation method and product of ferromagnetic nanowire
  • Preparation method and product of ferromagnetic nanowire
  • Preparation method and product of ferromagnetic nanowire

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Preparation of Ferromagnetic Nanowires

[0032] 1. A method for preparing ferromagnetic nanowires, said method comprising the steps of:

[0033] (1) Dissolve ferromagnetic metal salt (ferrous sulfate heptahydrate) in deionized water, then adjust the pH value to 11 with a pH regulator (sodium hydroxide), then add stabilizer (gelatin), complexing agent (polymer Vinylpyrrolidone) and surfactant (polyethylene glycol), after stirring, feed nitrogen to remove the oxygen in the solution, form ferrous sulfate heptahydrate mixed solution; Ferrous sulfate heptahydrate in this ferrous sulfate heptahydrate mixed solution The concentration is 0.05mol / L, the gelatin concentration is 0.02mol / L, the polyvinylpyrrolidone concentration is 0.0015mol / L, and the polyethylene glycol concentration is 0.0025mol / L;

[0034](2) After the reducing agent (sodium borohydride) is dissolved in deionized water, a sodium borohydride solution is formed; the concentration of sodium borohydride in the so...

Embodiment 2

[0037] 1. A method for preparing ferromagnetic nanowires, said method comprising the steps of:

[0038] (1) Dissolve the ferromagnetic metal salt (ferric chloride) in deionized water, then adjust the pH value to 12 with a pH regulator (sodium bicarbonate), then add a stabilizer (dodecyl acetic acid), complex Mixture (glycerin) and surfactant (polystyrene), after stirring, feed nitrogen to remove the oxygen in the solution, form ferric chloride mixed solution; Ferric chloride concentration in this ferric chloride mixed solution is 0.08mol / L, the concentration of lauryl acetate is 0.04mol / L, the concentration of glycerol is 0.001mol / L, and the concentration of polystyrene is 0.002mol / L;

[0039] (2) After the reducing agent (potassium borohydride) is dissolved in absolute ethanol, a potassium borohydride solution is formed; the concentration of potassium borohydride in the potassium borohydride solution is 0.9mol / L;

[0040] (3) The potassium borohydride solution formed in the...

Embodiment 3

[0042] 1. A method for preparing ferromagnetic nanowires, said method comprising the steps of:

[0043] (1) Dissolve the ferromagnetic metal salt (ferric citrate) in deionized water, then adjust the pH value to 10 with a pH regulator (sodium carbonate), then add a stabilizer (dimethyl dithiocarbamate), Complexing agent (sodium nitrilotriacetate) and surfactant (sodium dodecylbenzenesulfonate), after stirring, feed nitrogen to remove oxygen in the solution to form a ferric citrate mixed solution; the ferric citrate mixed solution The concentration of ferric citrate in the medium is 0.15mol / L, the concentration of dimethyl dithiocarbamate is 0.02mol / L, the concentration of sodium nitrilotriacetate is 0.002mol / L, and the concentration of sodium dodecylbenzenesulfonate is 0.003mol / L;

[0044] (2) After dissolving the reducing agent (hydrazine hydrate) in an aqueous solution of ethanol formed by mixing absolute ethanol and deionized water at a volume ratio of 1:1, a hydrazine hyd...

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Abstract

The invention relates to a preparation method and a product of a ferromagnetic nanowire, and belongs to the technical field of nanometer materials. The preparation method comprises the following steps: firstly, taking ferromagnetic metal salt and a stabilizer, a complexing agent and a surfactant are used as raw materials to prepare a ferromagnetic metal salt mixed solution, and then the reducing agent solution is injected in an injection manner, after the reaction, a solid product is prepared, and the solid product is washed and dried. According to the preparation method and the product of theferromagnetic nanowire, the synthetic route is simple, the process is controllable, the normal-temperature normal-pressure reaction is carried out, the actual production requirements are met, the industrial production is suitable, and meanwhile, the defect that a traditional in-situ reduction method can only be used for preparing ferromagnetic nanowires with a certain length-diameter ratio can beovercome. The prepared ferromagnetic nanowire has good orientation and the diameter is or less 100 nm, the length is 3-10 microns, the length-diameter ratio is high, and good flexibility, magnetic performance and microwave absorption performance are achieved.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and in particular relates to a preparation method and products of ferromagnetic nanowires. Background technique [0002] Ferromagnetic nanowires are nanoscale (E -9 m) A one-dimensional nanomaterial formed by stacking and growing iron atoms in a certain direction. The nanoscale size and unique structure make ferromagnetic nanowires exhibit many unique physical effects that bulk materials do not have, mainly including small size effects, surface interface effects, quantum size effects, and macroscopic quantum tunneling effects. The unique structure and unique optical, electrical, magnetic and other properties make ferromagnetic nanowires more and more widely used in various fields of society and industry. For example, large saturation magnetization, high coercive force, good oxidation resistance, and high signal-to-noise ratio enable high-performance magnetic recording materials base...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00B82Y40/00
CPCB82Y40/00B22F9/24B22F2009/245B22F1/07
Inventor 杨平安李锐刘琳卢毅李欣晏孙杨
Owner 重庆天渝新材料技术研究院有限公司
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