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A magnetic heterostructure fiber and its preparation method and application

A technology of heterogeneous structure and fiber, which is applied in the field of preparation of Fe3O4/Ni heterogeneous porous fiber electromagnetic composite material, can solve the problems that the work has not been reported yet, and achieve easy industrial application and promotion, strong magnetic response, and low equipment requirements high effect

Active Publication Date: 2017-04-05
浙江拓臻医疗科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

According to literature search, related work has not been reported

Method used

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  • A magnetic heterostructure fiber and its preparation method and application
  • A magnetic heterostructure fiber and its preparation method and application
  • A magnetic heterostructure fiber and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Firstly, 2mmol ammonium ferrous sulfate, 1mmol sodium lauryl sulfate, 10mL ethylene glycol, and 4mL distilled water were prepared as solution A. Then 1mmol sodium lauryl sulfate, 10mL ethylene glycol, 4mL distilled water and 2.2mmol ammonium oxalate were prepared as solution B. Dissolve solution A and solution B for 30 minutes respectively, then transfer solution B and solution A to a 100mL beaker, and react with magnetic stirring at room temperature for 1 hour, then wash with water and ethanol for six times, and dry at 60°C for 6 hours to obtain the desired fibrous shape. Ferrous oxalate precursor.

[0042] The morphology observed under the scanning electron microscope, the phase and infrared spectrum of the obtained product are as follows figure 1 , 2 , 3, it can be seen that the product is rod-shaped ferrous oxalate, the rod length is 1.18-1.76 μm; the diameter is 0.14-0.26 μm; the aspect ratio is 6.36-9.77.

Embodiment 2

[0044] Same step as Example 1, but the ratio of the amount of precipitating agent to ferrous ammonium sulfate is 1:2. The morphology of the obtained product observed under the scanning electron microscope is as follows: Figure 4 As shown, it can be seen that the product is rod-shaped ferrous oxalate, the rod length is 2.14-2.79 μm; the diameter is 0.25-0.39 μm; the aspect ratio is 5.49-9.38.

Embodiment 3

[0046] Identical to embodiment 1 step, but the ratio of the amount of substance of precipitating agent and ferrous ammonium sulfate is 2:1. The morphology of the obtained product observed under the scanning electron microscope is as follows: Figure 5 As shown, it can be seen that the product is rod-shaped ferrous oxalate, the rod length is 1.04-1.76 μm; the diameter is 0.14-0.30 μm; the aspect ratio is 5.05-7.84.

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Abstract

The invention discloses a magnetic heterostructure fiber, and a preparation method and application thereof. The fiber has a porous heterostructure, and the core of the fiber is ferroferric oxide assembled by nanocrystals and the surface of the fiber is coated by nickel nanocrystal; and the fiber length is 0.57-2.18 [mu]m, the diameter is 0.07-0.73 [mu]m, the nickel / iron atom ratio is 0:100-28.88:71.12, and the saturation magnetization is high (75.243-86.442emu / g). The fiber is prepared by using precipitation-precipitation transfer method-carbothermic reduction technology. The inventive method is simple in operation, good in controllability and repeatability, novel in formation mechanism, low in equipment requirements, low in cost and high in efficiency, and easy to promote industrial applications. The magnetic heterostructure fiber has the characteristics of porous structure, adjustable size and composition and strong magnetic responsiveness, and important application prospects in the fields of catalysts, electrode materials, magnetic recording materials, magnetic sensors, detection, microwave absorption, etc.

Description

technical field [0001] The invention belongs to the technical field of preparation of nano-electromagnetic composite materials, in particular, relates to a Fe 3 o 4 / Ni heterogeneous porous fiber electromagnetic composite material preparation method. Background technique [0002] Fe 3 o 4 It is an important magnetic oxide and is widely used in the field of microwave absorption. However, its low dielectric constant and poor matching and absorption characteristics make it difficult to meet the high requirements of "thin, light, wide, and strong" wave-absorbing coating materials. [0003] At present, people have prepared by composite technology: ①Composite of magnetic loss absorber and dielectric loss material (for example, carbon-coated FeO microspheres [see patent CN201310259969.6 for details]; coaxial cable structure MWCNT / Fe 3 o 4 / ZnO / PANI microwave absorber [see patent CN201310078376.X for details]; polypyrrole / Fe 3 o 4 / attapulgite nano-electromagnetic composite ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K3/00B01J23/755B01J35/10
Inventor 童国秀李亚娜崔婷婷叶宇城吴文华
Owner 浙江拓臻医疗科技有限公司
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