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Preparation method of organic polymer modified ferric iron tetroxide multistage spheres

An organic polymer and ferric oxide technology, which is applied in the direction of ferrous oxide, iron oxide/iron hydroxide, nanotechnology, etc., can solve the problem that the size of magnetic balls is difficult to control, affects the application of magnetic balls, and the synthesis process is complicated and other problems, to achieve the effect of improving solubility, satisfying production and application, and simple preparation method

Inactive Publication Date: 2015-11-18
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The surface of the magnetic balls prepared by this method contains various active functional groups, which can be directly coupled with the required ligands, but there are also problems such as complex synthesis process, high cost, difficult control of the size of the magnetic balls, wide particle size distribution, and poor shape. Irregularity and other shortcomings seriously affect the further application of magnetic balls

Method used

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  • Preparation method of organic polymer modified ferric iron tetroxide multistage spheres
  • Preparation method of organic polymer modified ferric iron tetroxide multistage spheres
  • Preparation method of organic polymer modified ferric iron tetroxide multistage spheres

Examples

Experimental program
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Effect test

Embodiment 1

[0021] The first step, in a 50 ml flask, add 1 part of ferric acetate and 10 parts of polyvinylpyrrolidone into 20 ml of diethylene glycol, heat to 60°C and keep it for 30 minutes, stir well to prepare a reaction solution.

[0022] The second step, the reaction solution prepared in the first step is transferred to a high-pressure reactor with a 25 ml polytetrafluoroethylene liner. After reacting at 140°C for 24 hours, the reactor is naturally cooled to about 60°C, and 5 ml methanol, the product was filtered, washed several times with absolute ethanol, and the sample was vacuum-dried to obtain organic polymer-modified ferric oxide multi-stage balls with regular size and shape.

[0023] figure 1 It is a scanning electron micrograph of the organic polymer modified ferric iron tetroxide multilevel sphere prepared in Example 1. It can be seen from the figure that the ferroferric oxide has a spherical structure with a size of about 250nm. Careful observation shows that the spheric...

Embodiment 2

[0025] The first step, in a 50 ml flask, add 10 parts of ferric acetate and 20 parts of polyacrylic acid into 20 ml of ethylene glycol, heat to 80°C and keep for 30 minutes, fully stir to prepare a reaction solution.

[0026] In the second step, transfer the reaction solution prepared in the first step into a high-pressure reactor with a 25 ml polytetrafluoroethylene liner. After reacting at 200°C for 48 hours, the reactor is naturally cooled to about 60°C, and 5 ml methanol, the product was filtered, washed several times with absolute ethanol, and the sample was vacuum-dried to obtain organic polymer-modified ferric oxide multi-stage balls with regular size and shape.

[0027] figure 2 It is a scanning electron micrograph of the organic polymer modified ferric iron tetroxide multilevel sphere prepared in Example 2. It can be seen from the figure that the ferroferric oxide has a spherical structure with a size of about 150nm. Careful observation shows that the spherical str...

Embodiment 3

[0029] The first step, in a 50 ml flask, add 1 part of ferric chloride hexahydrate and 20 parts of polyethylene glycol carboxylated at both ends to 1 ml of glycerol, heat to 60 ° C and keep for 30 minutes, Fully stir to prepare the reaction liquid.

[0030] The second step, the reaction solution prepared in the first step is transferred to a high-pressure reactor with a 25 ml polytetrafluoroethylene liner. After reacting at 180°C for 72 hours, the reactor is naturally cooled to about 60°C, and 5 ml methanol, the product was filtered, washed several times with absolute ethanol, and the sample was vacuum-dried to obtain organic polymer-modified ferric oxide multi-stage balls with regular size and shape.

[0031] image 3 It is a scanning electron micrograph of the organic polymer modified ferric iron tetroxide multilevel sphere prepared in Example 3. It can be seen from the figure that the ferroferric oxide has a spherical structure with a size of about 150nm. Careful observa...

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Abstract

The invention relates to a preparation method of a ferroferric oxide multi-stage ball modified by an organic polymer. In the preparation steps, the organic polymer is used as a modifier, polyol is used as a reaction solvent, and the ferroferric oxide multi-stage ball is prepared by adopting solvent heat. The specific preparation steps are as follows: dissolving ferric salt and the organic polymer in the polyol to prepare a reaction liquid; carrying out solvent heat treatment on the prepared reaction liquid so as to obtain the ferroferric oxide multi-stage ball with regular size and shape by controlling the temperature and reaction time. The preparation method is simple and has strong operability. Because the organic polymer is used as the modifier, the nano crystals of the ferroferric oxide can be well controlled in the processes of growth and congregation, and the ferroferric oxide particles are well protected, so that the ferroferric oxide as a primary unit is small in size and is good in uniformity. In addition, because the organic polymer has rich functional groups, the ferroferric oxide as the primary unit can be automatically aggregated into a multi-stage sphere structure.

Description

technical field [0001] The invention relates to a preparation method of ferric trioxide multistage spheres, in particular to a preparation method of organic polymer modified ferric trioxide multistage spheres. Background technique [0002] Micro / nanomaterials with special morphology, size and layer are of great significance in basic scientific research and practical application, and have received widespread attention. The multi-level structure assembled from low-dimensional nanomaterials as primary structural units is the focus of research. Therefore, designing and preparing hierarchically structured micro / nanomaterials with special morphology and size is one of the important topics in the research of hierarchically structured materials. Among them, the solvothermal method not only greatly enhances the dissolution, dispersion process and chemical reactivity of the reactants, but also enables the reaction to occur at a lower temperature; and due to the particularity of the c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/08B82Y40/00
Inventor 朱君
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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