Magnetic hollow compound microstructure preparation method

A composite microstructure, hollow technology, applied in magnetic materials, magnetic objects, electrical components, etc., can solve the problems of high cost, complicated preparation process, and difficult to control the self-assembly process.

Inactive Publication Date: 2010-01-06
GRADUATE SCHOOL OF THE CHINESE ACAD OF SCI GSCAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This makes the preparation process complicated and costly
Although the emerging template-free method technology (self-assembly method) has improved the traditional method in recent years, it is difficult to control the self-assembly process and the addition of a large amount of surfactant is still inevitable. Therefore, the development of simple preparation of magnetic hollow The method of structure is particularly important

Method used

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  • Magnetic hollow compound microstructure preparation method
  • Magnetic hollow compound microstructure preparation method
  • Magnetic hollow compound microstructure preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Example 1: Weigh 3.0 g of spherical polysaccharide microspheres, disperse them in 50 ml of deionized water, add ferric chloride to keep its concentration at 0.01-0.1 mol / L, and sodium acetate to keep its concentration at 10-50 g / L, 50ml of ethylene glycol, stirred for 60 minutes, transferred to the reaction kettle, placed in a constant temperature box, heated at 190°C for 12h, washed the obtained precipitate with deionized water, and dried at 20°C for 24h to obtain Spherical ferroferric oxide magnetic composite microstructure finished product.

Embodiment 2

[0015] Example 2: The difference from Example 1 is that 3.0 g of apple-shaped polysaccharide microspheres are weighed, and the rest of the steps are the same as in Example 1 to obtain an apple-shaped ferroferric oxide magnetic composite microstructure product.

Embodiment 3

[0016] Example 3: The difference from Example 1 is that 3.0 g of jar-shaped polysaccharide microspheres are weighed, and the rest of the steps are the same as in Example 1 to obtain a jar-shaped ferroferric oxide magnetic composite microstructure product.

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Abstract

The invention provides a magnetic hollow compound microstructure preparation method, comprising the following steps: adopting spherical, apple-shaped and jar-shaped polysaccharide microspheres as templates, and coating series magnetic materials such as ferroferric oxide, ferrite and the like on the hollow polysaccharide microstructure compactly under 160-250 DEG C of hydrothermal condition to obtain spherical, apple-shaped and jar-shaped magnetic hollow compound microstructure. By observing under electron microscopy, the particle size of the magnetic materials coated on the surface of the polysaccharide microspheres is uniform and is about 50nm. The magnetic force test shows that the microstructure has good superparamagetism. The method has simple process and low cost.

Description

technical field [0001] The invention relates to the preparation of magnetic hollow materials, in particular to a preparation method of magnetic hollow composite microstructures with different shapes (spherical, apple-shaped, jar-shaped). Background technique [0002] Due to its controllable external field and large internal capacity, magnetic hollow structures have great potential applications in many fields such as directional drug delivery, medical diagnosis, biochemical separation, sensors, catalysis, and environmental remediation, so they have attracted much attention. The traditional template synthesis strategy usually needs to add a large amount of modification reagents to modify the surface of the template before coating the magnetic particles—functionalization, so that the surface has groups that can bond ions. This complicates the preparation process and increases the cost. Although the emerging template-free technology (self-assembly method) has improved the tradi...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C08J3/20C08L5/00C08K3/22C08K3/24H01F1/00
Inventor周克斌杨森王雷倪德志
OwnerGRADUATE SCHOOL OF THE CHINESE ACAD OF SCI GSCAS