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Preparation method of high-performance magnetic polyurethane elastomer composites

A technology of polyurethane elastomers and composite materials, which is applied in the direction of magnetism of organic materials/organic magnetic materials, can solve problems such as the difficulty of simultaneously optimizing mechanical and magnetic properties, and achieve improved mechanical and magnetic properties and improved dispersion , Improve the effect of dispersion uniformity

Active Publication Date: 2015-05-06
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention solves the problem that it is difficult to simultaneously optimize the mechanical properties and magnetic properties of existing magnetic elastomer composite materials, and provides a preparation method for high-performance magnetic polyurethane elastomer composite materials

Method used

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  • Preparation method of high-performance magnetic polyurethane elastomer composites

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Embodiment 1

[0026] A method for preparing a high-performance magnetic polyurethane elastomer composite material, comprising the steps of:

[0027] 1) Preparation of stable graphene Fe 3 o 4 organic magnetic liquid;

[0028] a. Under ice bath conditions, add 2g of natural flake graphite and 2g of sodium nitrate into 46ml of concentrated sulfuric acid, and stir vigorously at a speed of 600r / min for 30min; further add 6g of potassium permanganate at a speed of 0.5g / min into the mixed solution of the above three substances, and then vigorously stirred at a speed of 600r / min for 60min; transferred the mixed solution of the above four substances to a water bath at 45°C, stirred at a speed of 400r / min for 4h, and then deionized 80ml Add water to the mixture of the above four substances, and then transfer it to an oil bath at 95°C; when the temperature of the reaction solution reaches 95°C, add 200ml of deionized water in a line, and then add 16ml of concentration 30% hydrogen peroxide, the so...

Embodiment 2

[0037] A method for preparing a high-performance magnetic polyurethane elastomer composite material, comprising the steps of:

[0038] 1) Preparation of stable graphene Fe 3 o 4 organic magnetic liquid;

[0039] a. Under ice bath conditions, add 2g of natural flake graphite and 2g of sodium nitrate into 46ml of concentrated sulfuric acid, and stir vigorously at a speed of 600r / min for 30min; further add 6g of potassium permanganate at a speed of 0.5g / min into the mixed solution of the above three substances, and then vigorously stirred at a speed of 600r / min for 60min; transferred the mixed solution of the above four substances to a water bath at 45°C, stirred at a speed of 400r / min for 4h, and then deionized 80ml Add water to the mixture of the above four substances, and then transfer it to an oil bath at 95°C; when the temperature of the reaction solution reaches 95°C, add 200ml of deionized water in a line, and then add 16ml of concentration 30% hydrogen peroxide, ...

Embodiment 3

[0048] A method for preparing a high-performance magnetic polyurethane elastomer composite material, comprising the steps of:

[0049] 1) Preparation of stable graphene Fe 3 o 4 organic magnetic liquid;

[0050] a. Under ice bath conditions, add 2g of natural flake graphite and 2g of sodium nitrate into 46ml of concentrated sulfuric acid, and stir vigorously at a speed of 600r / min for 30min; further add 6g of potassium permanganate at a speed of 0.5g / min into the mixed solution of the above three substances, and then vigorously stirred at a speed of 600r / min for 60min; transferred the mixed solution of the above four substances to a water bath at 45°C, stirred at a speed of 400r / min for 4h, and then deionized 80ml Add water to the mixture of the above four substances, and then transfer it to an oil bath at 95°C; when the temperature of the reaction solution reaches 95°C, add 200ml of deionized water in a line, and then add 16ml of concentration 30% hydrogen peroxide, ...

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Abstract

The invention relates to magnetic polyurethane elastomer composites, in particular to a preparation method of high-performance magnetic polyurethane elastomer composites, and aims to solve the problem that the mechanical and magnetic properties of magnetic elastomer composites are difficult to be optimized simultaneously, wherein the solution is that the preparation method comprises the following steps: preparing Fe3O4 water-based magnetic fluid by a chemical coprecipitation method, and preparing graphene @ Fe3O4 composite magnetic particles by adsorption; purifying and dispersing the graphene @ Fe3O4 composite magnetic particles in an organic solvent to obtain graphene @ Fe3O4 composite organic magnetic fluid; taking graphene @ Fe3O4 composite organic magnetic fluid as one of the main raw materials to prepare graphene @ Fe3O4 polyurethane elastomer composites by a magnetic controlled in-situ polymerization method. The preparation method of high-performance magnetic polyurethane elastomer composites has the advantages that the problem of easy aggregation of functional fillers in the preparation and forming process of composites is solved, the dispersion and distribution of functional particles in polymer matrix are improved and controlled, graphene is introduced to improve the mechanical and magnetic properties of magnetic elastomer composites simultaneously, and the magnetic elastomer composites have excellent mechanical and magnetic properties.

Description

technical field [0001] The invention relates to a magnetic polyurethane elastomer composite material, in particular to a preparation method for a high-performance magnetic polyurethane elastomer composite material. Background technique [0002] Fe 3 o 4 Polyurethane magnetic elastomer composites can be widely used in intelligent damping, electromagnetic shielding, broadband microwave absorption, magnetic control sensors, magnetic Sealing devices and other fields. However, this magnetic functional material always has the contradictory problem that it is difficult to improve the mechanical properties and magnetic properties at the same time, which greatly limits its application. The main reason for this phenomenon is the poor dispersion of magnetic particles in the elastomer, Fe 3 o 4 It is caused by severe agglomeration of magnetic particles. At present, in order to solve the problem of poor dispersion of functional fillers in the matrix, researchers at home and abroad ...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/48C08G18/32C08G18/10C08K9/02C08K3/22C08K3/04
CPCC08G18/10C08G18/4854C08G18/6685C08K3/04C08K3/22C08K9/02C08K2003/2275C08K2201/011H01F1/42C08G18/3814
Inventor 刘亚青孙友谊于海林王妍池慧娟赵贵哲
Owner ZHONGBEI UNIV
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