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Method for preparing magnetic material taking leopard palm as matrix

A magnetic material, konjac technology, applied in the field of functional inorganic materials and nanoscience, can solve the problems of less research on nanomaterials, and achieve the effect of safe preparation process, good soft magnetic material properties, and environmental protection requirements.

Inactive Publication Date: 2010-05-19
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Konjac is used as a substrate to synthesize FeNi magnetic nanoparticles or magnetic fluids. The unique structure and chemical and physical properties of konjac have important research value in controlling the morphology of nanoparticles. At present, there are few studies on the synthesis of nanomaterials using konjac as a template.

Method used

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  • Method for preparing magnetic material taking leopard palm as matrix
  • Method for preparing magnetic material taking leopard palm as matrix
  • Method for preparing magnetic material taking leopard palm as matrix

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A kind of preparation method of the magnetic material of konjac substrate, it comprises the steps:

[0028] 1) get the ferrous salt and the nickel salt that the total molar number is 5mmol, wherein the molar percentage of the ferrous salt and the total molar number of the nickel salt is 20% (that is, the molar number of the ferrous salt is 1mmol), the The ferrous salt is F e SO 4 , the nickel salt is NiCl 2 ; Konjac 0.3g, water 50mL, hydrazine hydrate 20mL (ie 20.6g);

[0029] Mix ferrous salt, nickel salt, konjac and water, stir and disperse for 30 minutes, add hydrazine hydrate (strong reducing agent) at 80°C, stir and react for 30 minutes under alkaline conditions (adjust pH to 10 with NaOH), cool to room temperature, Magnetic separation, separation and washing with water and absolute ethanol were carried out three times respectively, and vacuum drying was carried out at room temperature to obtain FeNi magnetic nanoparticles synthesized with konjac as a template. ...

Embodiment 2

[0035] A kind of preparation method of the magnetic material of konjac substrate, it comprises the steps:

[0036] Step 1) is identical with embodiment 1.

[0037] 2) FeNi magnetic nanoparticles and konjac are added to water to obtain a mixed solution; the mass concentration of FeNi magnetic nanoparticles in the mixed solution is 0.7wt%, and the mass concentration of konjac in the mixed solution is 12.5wt%; Stir for 60 minutes, cool to room temperature, pour into a mold, transfer to an oven and dry at 80° C. for 10 hours to obtain a konjac-based magnetic material.

[0038] Figure 8 The FESEM figure of the magnetic membrane material of the konjac substrate synthesized by this embodiment is shown, Figure 8 It can be seen that the surface of the product is smooth as a whole, containing a small amount of small protrusion structures, and a large number of pore-like structures of about 30 nm are distributed in it.

Embodiment 3

[0040] A kind of preparation method of the magnetic material of konjac substrate, it comprises the steps:

[0041] Step 1) is identical with embodiment 1.

[0042] 2) FeNi magnetic nanoparticles and konjac are added to water to obtain a mixed solution; the mass concentration of FeNi magnetic nanoparticles in the mixed solution is 0.7wt%, and the mass concentration of konjac in the mixed solution is 15wt%; the mixed solution is stirred at 80°C After 60 minutes, cool to room temperature, pour into a mold, transfer to an oven and dry at 80° C. for 10 hours to obtain a konjac-based magnetic material.

[0043] Figure 9 The FESEM figure of the magnetic membrane material of the konjac substrate synthesized by this embodiment is shown, Figure 9 It can be seen that the surface of the product is uneven and concave-convex.

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Abstract

The invention relates to a method for preparing a magnetic material taking leopard palm as a matrix, which is characterized by comprising the following steps: 1) preparing FeNi magnetic nanoparticles in the ratio of ferrite and a nickel salt to leopard palm to water to a strong reducer of 2 to 20mmol: 0.05 to 1.0 gram: 50ml: 1.0 gram to 21.0 gram, wherein the ferrite accounts for 10 to 90 percent of the total molar ratio of the ferrite and the nickel salt; and preparing the FeNi magnetic nanoparticles which are synthesized by taking the leopard palm as a template; 2) adding the FeNi magnetic nanoparticles and the leopard palm into water to obtain a mixed solution, wherein the mass concentration of the FeNi magnetic nanoparticles in the mixed solution is 0.3 to 3.0 percent by weight, and the mass concentration of the leopard palm in the mixed solution is 5.0 to 25.0 percent by weight; stirring the mixed solution at 40 to 90 DEG C for 30 to 120 minutes, cooling the mixed solution to the room temperature, and then pouring the mixed solution into a mould, placing the mould into an oven and drying the mould at 25 to 90 DEG C for 6 to 24 hours to obtain the magnetic material taking the leopard palm as the matrix. The method has safe, simple and efficient process, and meets the requirement of environmental protection.

Description

technical field [0001] The invention relates to a preparation method of a magnetic material, which belongs to the field of functional inorganic materials and also belongs to the field of nanometer science and technology. Background technique [0002] Konjac, also known as konjac, konjac, and hemp taro, is a perennial herb of the family Araceae. There are 130 species known in the world, among which my country is one of the most important producers of konjac in the world. The tubers of some species of Konjac are rich in konjac polysaccharides, especially the content of white konjac and flower konjac varieties is as high as 50-65%. Konjac polysaccharide, also known as konjac glucomannan (KGM for short), is a linear polymer compound connected by numerous mannose and glucose with β-1,4-glycosidic bonds. The molecular ratio of glucose and mannose is 1:1.5-1.7, the molecular weight can be as high as 10 6 Dalton has a very high viscosity, is soluble in water, has a large degree o...

Claims

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Application Information

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IPC IPC(8): H01F1/00
Inventor 黄进周少锋章桥新刘露露杨光正
Owner WUHAN UNIV OF TECH
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