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Magnetic porous composite material and preparing method thereof

A porous composite material and magnetic technology, applied in the field of magnetic porous composite materials and their preparation, can solve the problems of expensive raw materials, limited application scope, etc., and achieve the effects of convenient transportation, simple and convenient separation, and increased specific surface area.

Inactive Publication Date: 2010-04-07
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The raw materials involved in the method of synthesizing the material are very expensive, which limits the scope of application of the material.

Method used

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  • Magnetic porous composite material and preparing method thereof
  • Magnetic porous composite material and preparing method thereof
  • Magnetic porous composite material and preparing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0018] The material is mainly based on porous calcium sulfate, and iron oxide is closely combined with calcium sulfate in the form of nanoparticles. The particle size of the composite material is about 0.1-5μm, the pore size distribution is 10-200nm, and the specific surface area is 10-300m 2 / g between.

[0019] Its preparation method is prepared according to the following steps:

[0020] ①Preparation of polyvinyl alcohol bubbles: Mix 6.0g of polyvinyl alcohol 1788 and 0.5g of polyethylene glycol 6000 together, then add 35mL of water and swell in a boiling water bath, then add 4.0g of starch, 1.0g of calcium carbonate Mix the mixture with 6.0g ferrocene, stir it evenly, then mechanically foam for more than 20 minutes, and finally add 4.0mL formaldehyde and 4.0mL sulfuric acid in turn, wait for the foam body to be acetalized and then dry.

[0021] ②Preparation of magnetic porous calcium sulfate / iron oxide composite material: Soak the above-mentioned polyvinyl alcohol in the ...

Embodiment 2

[0023] With the step of embodiment 1, add the mixture that is made up of 4.0g starch, 1.0g calcium carbonate and 6.0g ferric nitrate. The temperature of the final heat treatment was 600°C.

Embodiment 5

[0025] With the step of embodiment 1, polyvinyl alcohol selects PVA2488 for use.

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Abstract

The invention relates to a magnetic porous composite material and a preparing method thereof. The invention is characterized by comprising porous calcium sulphate serving as a matrix and magnetic ferric oxide component, and ferric oxide is tightly combined with calcium sulphate in the mode of nano-particles. The preparing method of the magnetic porous composite material comprises the following steps: (1) mixing polyvinyl alcohol with polyethylene glycol in a boiling water bath for swelling, then adding uniform mixture composed of starch, calcium carbonate and molysite or ferreous compound, and mechanically bubbling in the mode of violently stirring; and (2) adding formaldehyde and sulfuric acid to fix a macromolecule skeleton under acetalation reaction; finally performing heat treatment to prepared polyvinyl alcohol foam in air atmosphere at the temperature of 500 DEG C for 3 hours; then, ball milling for 4 hours at the rotating speed of 300r / min to obtain magnetic porous calcium sulphate / ferric oxide composite material. The invention has low preparing cost and simple preparing procedure and is easy to realize volume production.

Description

technical field [0001] The invention relates to a porous composite material and a preparation method thereof, in particular to a magnetic porous composite material and a preparation method thereof. Background technique [0002] In recent years, magnetic carrier materials have attracted more and more attention because they can be recovered and reused conveniently by applying an external magnetic field. The surface of the magnetic carrier material is chemically modified, and then various catalysts, enzymes or drugs are immobilized on it, which can be recycled by an external magnetic field to achieve the purpose of multiple cycles; or, the magnetic material is made porous, through Various catalysts, enzymes or drugs are immobilized by physical adsorption. Literature (Zhu Y F, Stefan K, Shi J L, et al. Chem Mater, 2007, 19: 6408~6413.) deposited ferric nitrate in porous silica particles, and then reduced it in a hydrogen atmosphere at a temperature of 400 ° C. The recycled mag...

Claims

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Application Information

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IPC IPC(8): H01F1/00
Inventor 毕红张红
Owner ANHUI UNIVERSITY
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