Preparation method for high-performance magnetic Fe3O4/polyurethane elastomer composite material

A polyurethane elastomer and composite material technology, which is applied in the field of high-performance magnetic Fe3O4/polyurethane elastomer composite material preparation, can solve the problems of difficult simultaneous improvement of mechanical properties and magnetic properties, poor dispersion, and small filling of magnetic particles. Improve performance and magnetic properties, reduce viscosity, improve the effect of easy agglomeration

Active Publication Date: 2015-08-26
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention solves the problems that the mechanical properties and magnetic properties of the existing magnetic polyurethane elastomer composite materials are difficult to improve at the same time, and the magnetic particle filling amount is small and the dispersion is poor when the magnetic elastomer composite materials are prepared by in-situ polymerization, and provides a high-performance Magnetic Fe 3 o 4 / Preparation method of polyurethane elastomer composite material

Method used

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  • Preparation method for high-performance magnetic Fe3O4/polyurethane elastomer composite material
  • Preparation method for high-performance magnetic Fe3O4/polyurethane elastomer composite material
  • Preparation method for high-performance magnetic Fe3O4/polyurethane elastomer composite material

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Experimental program
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Effect test

Embodiment 1

[0022] High performance magnetic Fe 3 o 4 / Polyurethane elastomer composite material preparation method, comprises the steps:

[0023] 1) Preparation of stable Fe 3 o 4 organic magnetic liquid

[0024] a. Add 3.58g FeCl 2 4H 2 O, 6.08g FeCl 3 ·6H 2 Oleic acid with a total mass of 0.1wt% of iron salt was dissolved in 90mL of deionized water. After mixing evenly under the condition of mechanical stirring at 50°C and 600r / min, 92.4mL was added dropwise at 2 drops / second with a concentration of 1.34mol / L of NaOH aqueous solution, continue to react for 90 minutes after the dropwise addition, stop, cool to room temperature, magnetically separate the solution to obtain a black precipitate, remove the supernatant, and then use deionized water to ultrasonically disperse and magnetically separate until the pH of the supernatant is It is neutral; then magnetic separation is carried out to remove water to obtain Fe 3 o 4 black magnetic particles;

[0025] b. Add 80mL tetrahydr...

Embodiment 2

[0032] High performance magnetic Fe 3 o 4 Poly / urethane elastomer composite material preparation method, comprises the steps:

[0033] 1) Preparation of stable Fe 3 o 4 organic magnetic liquid

[0034] a. Add 3.58g FeCl 2 4H 2 O, 6.08g FeCl 3 ·6H 2 KH550 with a total mass of 1 wt% of O and iron salts was dissolved in 90 mL of deionized water. After mixing evenly at 50°C and under mechanical stirring at 600 r / min, 92.4 mL of KH550 with a concentration of 1.34 mol / L was added dropwise at 2 drops / second. NaOH aqueous solution, continue to react for 90min after the dropwise addition, then stop, cool to room temperature, magnetically separate the solution to obtain a black precipitate, remove the supernatant, then ultrasonically disperse with deionized water, magnetically separate, and wash repeatedly until the supernatant pH is neutral; water is then removed by magnetic separation to obtain Fe 3 o 4 black magnetic particles;

[0035] b. Add 80mL absolute ethanol to the ...

Embodiment 3

[0042] High performance magnetic Fe 3 o 4 / Polyurethane elastomer composite material preparation method, comprises the steps:

[0043] 1) Preparation of stable Fe 3 o 4 organic magnetic liquid

[0044] a. Add 3.58g FeCl 2 4H 2 O, 6.08g FeCl 3 ·6H 2 Dissolve KH460 with a total mass of 2 wt% of O and iron salts in 90 mL of deionized water, and mix well under the mechanical conditions of 50 °C and 600 r / min, then add 92.4 mL of NaOH with a concentration of 1.34 mol / L dropwise at 2 drops / second Aqueous solution, continue to react for 90 minutes after the dropwise addition, then stop, cool to room temperature, conduct magnetic separation on the solution to obtain a black precipitate, remove the supernatant, then use deionized water to ultrasonically disperse, magnetically separate, and repeat washing until the pH of the supernatant is It is neutral; then magnetic separation is carried out to remove water to obtain Fe 3 o 4 black magnetic particles;

[0045] b. Add 80mL t...

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Abstract

The invention relates to a preparation method for a magnetic composite material, and particularly to a preparation method for a high-performance magnetic Fe3O4/polyurethane elastomer composite material, which solves the problems that the mechanical performance and magnetic performance of a current magnetic polyurethane elastomer composite material are difficult to improve simultaneously, and magnetic particles are smaller in filling amount and poor in dispersity, the scheme is that: 1) preparing Fe3O4 with FeCl2.4H2O, FeCl3.6H2O, a surface active agent and NaOH; adding an organic solvent for magnetic separation and purification; adding the organic solvent for ultrasonic dispersion so as to preparing an organic magnetic liquid; 2) adding tetrahydrofuran ether diol, and using anhydrous acid to adjust pH; adding toluene diisocyanate to obtain polyurethane prepolymer; adding chain extender, vacuumizing, defoaming and adding a magnetic field externally to heat and vulcanize, and preparing the Fe3O4/polyurethane elastomer composite material. The preparation method for the high-performance magnetic Fe3O4/polyurethane elastomer composite material has the advantages that: 1. Magnetic particles have good dispersity in the elastomer, and form a cross-linked structure with matrix; 2. inorganic acid is added, the viscosity of a polyurethane prepolymer system is reduced, and the high concentration adulteration of magnetic particles is guaranteed; and 4. the mechanical performance and magnetic performance of the magnetic polyurethane elastomer composite material are improved simultaneously.

Description

technical field [0001] The invention relates to a method for preparing a magnetic composite material, in particular to a high-performance magnetic Fe 3 o 4 / Preparation method of polyurethane elastomer composite material. Background technique [0002] Fe 3 o 4 / Polyurethane magnetic elastomer composites can be widely used in intelligent damping, electromagnetic shielding, light broadband microwave absorbers, magnetic control because of their excellent properties, such as magnetic properties, light weight, low magnetic loss, good stability, and easy processing. Sensors, magnetic sealing devices and other fields. However, there is always a problem in this magnetic functional composite material, that is, how to obtain a composite material with excellent comprehensive properties such as mechanical properties and magnetic properties. The reason why the mechanical properties and magnetic properties cannot be optimized at the same time is that Fe 3 o 4 / Preparation method o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/32C08G18/10C08K9/04C08K3/22
CPCC08G18/10C08G18/4854C08G18/6685C08K3/22C08K9/04C08K2003/2275C08G18/3814
Inventor 刘亚青孙友谊于海林高莉侯春林赵贵哲
Owner ZHONGBEI UNIV
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