Method for synthesizing ferrimagnetism hollow microballoons

A technology of hollow microspheres and ferrite, applied in the field of magnetic material preparation, can solve the problems of high price, unfavorable batch production, and many steps of triblock polymer PEO-PPO-PEO, and achieve low cost and simple method , wide applicability

Active Publication Date: 2008-12-31
溧阳常大技术转移中心有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

A research group of Nanjing University (Advance Materials, volume 16, page 933, 2004.) reported that by Fe 3 o 4 Self-assembly of nanoparticles and polymers is a method for synthesizing hollow magnetic nanoparticles, but this method has many steps and involves pyrolysis to remove polymers, which is not conducive to mass production
A resear...

Method used

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  • Method for synthesizing ferrimagnetism hollow microballoons
  • Method for synthesizing ferrimagnetism hollow microballoons
  • Method for synthesizing ferrimagnetism hollow microballoons

Examples

Experimental program
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Embodiment 1

[0016] Embodiment 1 weighs 0.675g FeCl 3 ·6H 2 O, add to 20ml ethylene glycol to dissolve completely. Then weigh 0.9-3.6g sodium acetate and 0.1-2.0g polyethylene glycol 1000 and add to FeCl 3 ·6H 2 O, in the ethylene glycol solution, stir vigorously for about 30 minutes, stir evenly, place in a 30ml stainless steel pressure-resistant reaction kettle, react at 200°C for 6 hours, and obtain a black powder after centrifugation, washing and drying of the obtained precipitate . Such as figure 1 The shown product is identified as ferric oxide by X-ray diffraction (XRD); its shape and size are observed with a transmission electron microscope (TEM), and the product is a hollow microsphere with a particle diameter between 150-500nm.

Embodiment 2

[0017] Example 2 The test method is the same as in Example (1), except that 0.1-2.0 g of polyethylene glycol 6000 is used to replace 0.1-2.0 g of polyethylene glycol 1000, and black powder is also obtained.

Embodiment 3

[0018] Example 3 The test method is the same as in Example (1), except that 0.1-2.0 g of polyethylene glycol 10000 is used instead of 0.1-2.0 g of polyethylene glycol 1000, and black powder is also obtained.

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Abstract

The invention belongs to the preparation field of magnetic materials, comprising the following steps: firstly, adding the metal ion salt to organic polar solvent for complete dissolution, and then adding solid alkali metal salt and surfactant; the composed mixed solution is reacted at 140-200 DEG C so as to get ferrimagnetic hollow microspheres; the mass ratio between the surfactant and the organic polar solvent is 0.02-0.2:1; the concentration of the metal ion solution is 0.025-0.625mol / L; the molar ratio between the alkali metal salt and the metal ions is 5-20:1; the metal ion is selected from one or more among the iron, cobalt, nickel, manganese, zinc and magnesium ions; the surfactant can be polyethylene glycol series or tween series; the organic polar solvent can be glycol, ethanol, diethylene glycol, triethylene glycol, tetraethylene glycol or glycerol. The method of the invention is simple and the raw materials are cheap and can be easily obtained; the method has good process repeatability, high yield, safety, low cost and wide applicability, which generates no toxic substances and pollutants.

Description

technical field [0001] The invention relates to a synthesis method of a series of ferrite magnetic hollow microspheres, which belongs to the field of preparation of magnetic materials. Background technique [0002] Hollow spherical nanostructure materials have the characteristics of low density, high surface area, and molecules can pass through spherical shells with polycrystalline microstructures, and can be used as catalysts, low-density structural materials, chemical sensors, substances (drugs, cosmetics, and dyes, etc.), nano-scale or micro-scale reactors and electrode materials, etc. Therefore, this type of material has been widely concerned by material researchers in recent years, and it is a hot field of nanomaterials research today. . Generally speaking, there are two ways to synthesize such hollow sphere nanostructure materials. One approach is based on the use of various removable templates to prepare hollow sphere-structured materials, such templates include har...

Claims

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Application Information

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IPC IPC(8): C04B35/26
Inventor 刘琦黄鹤翔赖梨芳戎红仁杨骞朱恩静
Owner 溧阳常大技术转移中心有限公司
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