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Method and equipment for preparing shell type magnetic compound particles of organic matter / carbonyl iron core through dry process

A technology of magnetic composite particles and carbonyl iron, which is applied in the directions of inorganic material magnetism, dyed polymer organic compound treatment, fibrous filler, etc., can solve the problems of long process flow and high cost

Inactive Publication Date: 2009-09-02
WUHAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method and device for dry preparation of organic / carbonyl iron core-shell magnetic composite particles, improve the oxidation resistance of carbonyl iron powder and compatibility with solvents, and overcome the long technical process of wet preparation , high cost, the prepared composite magnetic particles can be used to prepare magnetorheological fluids and magnetorheological rubber elastomers

Method used

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  • Method and equipment for preparing shell type magnetic compound particles of organic matter / carbonyl iron core through dry process
  • Method and equipment for preparing shell type magnetic compound particles of organic matter / carbonyl iron core through dry process
  • Method and equipment for preparing shell type magnetic compound particles of organic matter / carbonyl iron core through dry process

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Effect test

Embodiment 1

[0031] Preparation of N-polyoxyethylene(10) ether-based ethylenediaminetriacetic acid / carbonyl iron core-shell magnetic composite particles

[0032] The preparation steps are:

[0033] Step 1. Dissolve 20 grams of N-polyoxyethylene (10) ether-based ethylenediamine triacetic acid in 1000 grams of 5% sodium hydroxide aqueous solution, stir evenly to form an organic reactant solution, and add it to the organic solution storage tank 14;

[0034] Step 2. Close exhaust pipe valve 3, carbonyl iron powder delivery valve 4, inert gas delivery valve 5, kettle bottom discharge valve 6, steam valve 9, condensed water discharge valve 10, cooling water inlet valve 11, cooling water discharge valve 12;

[0035] Step 3, open the carbonyl iron powder delivery valve 4, send 1000 grams of carbonyl iron with nitrogen through the carbonyl iron powder delivery valve 4 into the reactor cylinder 1 with a volume of 5 liters, and close the carbonyl iron powder delivery valve 4 after delivery;

[0036...

Embodiment 2

[0046] Preparation of N-hexadecylethylenediaminetriacetic acid / carbonyl iron core-shell magnetic composite particles

[0047] Its preparation steps and operation are identical with embodiment 1, and its processing condition is:

[0048] The organic reactant solution is made by dissolving 100 grams of N-hexadecylethylenediaminetriacetic acid in 1000 grams of 10% potassium hydroxide ethanol solution; 1000 grams of carbonyl iron powder; the pressure in the reactor is 0.2 MPa; The temperature is 50-70°C; after reacting for 10 minutes, the reaction product is analyzed and inspected. After reaching the design requirements, cooling water is passed into the reactor jacket 8 to cool down. After the temperature in the kettle drops to 40°C, the material is discharged to obtain N-16 Alkylethylenediaminetriacetic acid / carbonyl iron core-shell magnetic composite particles;

Embodiment 3

[0050] Preparation of N-dodecanoylethylenediaminetriacetic acid / carbonyl iron core-shell magnetic composite particles

[0051] Its preparation steps and operation are identical with embodiment 1, and its processing condition is:

[0052] The organic reactant solution is made by dissolving 80 grams of N-lauroyl ethylenediamine triacetic acid in 1000 grams of 8% aqueous sodium hydroxide solution; 1000 grams of carbonyl iron powder; the pressure in the reactor is 0.05 MPa. The medium temperature is 60-80°C; after reacting for 40 minutes, the reaction product is analyzed and inspected. After reaching the design requirements, cooling water is passed into the jacket 8 of the reaction kettle to cool down. After the temperature in the kettle drops to about 30°C, the material is discharged to obtain N- Dodecanoyl ethylenediamine triacetic acid / carbonyl iron core-shell magnetic composite particles.

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Abstract

A method and device for preparing organic / carbonyl iron core-shell magnetic composite particles by a dry method. The core of the core-shell composite particle is carbonyl iron particles, and the shell of the core-shell composite particle is an organic-chelating surfactant. The above-mentioned chelating surfactant has one end forming a chelating bond with the metal ion on the surface of the metal particle, and the other end is an organic group with affinity with oil or water, or an organic group with a functional group. , so that the core-shell composite particles become functional particles. The preparation method is a dry method, the carbonyl iron particles are boiling in a reaction kettle, collide with misty organic matter, and react to generate organic matter / carbonyl iron core-shell magnetic composite particles. The process and equipment of this method are relatively simple, the production efficiency is high, the cost is low, the pollution is less, and the product purity is high.

Description

technical field [0001] The invention relates to a method for preparing composite particles, in particular to a method and device for preparing organic / carbonyl iron core-shell magnetic composite particles. Background technique [0002] Carbonyl iron powder is a kind of soft magnetic particles with abundant resources and low cost, which has been produced on an industrial scale. It can be widely used in magnetic materials, magnetorheological smart materials, microwave absorbing materials, etc. In many applications, especially for the preparation of magnetorheological fluids and magnetorheological rubber elastomers, not only carbonyl iron powder is required to have excellent magnetic properties, but also carbonyl iron powder is required to have good compatibility with organic substances such as silicone oil and mineral oil. compatibility. When the carbonyl iron powder is an ultrafine powder, its specific surface area is large and it is easily oxidized, so it is required to pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C3/10C09C1/22C04B35/628B22F1/02H01F1/11
Inventor 程海斌高为鑫张清杰许帅赵文俞袁润章
Owner WUHAN UNIV OF TECH