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A preparation method of magnetorheological elastomer with controlled radial distribution of magnetic particles

A magnetorheological elastomer and magnetorheological elasticity technology, applied in the field of magnetorheological materials, can solve the problems of increasing the difficulty of manufacturing magnetic field generating devices, limiting the application of magnetorheological elastomers, prolonging the production cycle, etc., and achieving a long production cycle , Improving the magnetorheological effect and the effect of easy operation

Active Publication Date: 2020-11-10
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In previous studies, magnetorheological elastomers were mostly used in the vibration damping of automobiles, trains, and ships, but there were few studies on using magnetorheological elastomers as media to form large complex curved components. The magnetorheological elastomer has high requirements on the magnetic field generating device in the preparation process, requiring the magnetic field generating device to maintain a large magnetic field strength in the case of a large magnetic field range, which will greatly increase the difficulty of making the magnetic field generating device and prolong the production process. Period, even difficult to complete its production, which greatly limits the application of magnetorheological elastomers in forming

Method used

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  • A preparation method of magnetorheological elastomer with controlled radial distribution of magnetic particles
  • A preparation method of magnetorheological elastomer with controlled radial distribution of magnetic particles
  • A preparation method of magnetorheological elastomer with controlled radial distribution of magnetic particles

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specific Embodiment approach 1

[0033] Prepared by the method of the present invention such as figure 1 Shown is a magnetorheological elastomer in which most of the magnetic particles are distributed along the central axis of the silicone rubber matrix. Prepare raw materials according to the ratio of 20% silicone rubber, 60% carbonyl iron powder, and 20% plasticizer, and place the prepared silicone rubber and carbonyl iron powder in a vacuum drying oven for 2 hours at 80°C; Add the uniform mixture of the two to the fluid silicone rubber raw material and stir it with a high-speed mixer for 10-15 minutes to make the magnetic particles evenly distributed in the rubber matrix; after stirring evenly, put the mixture into a vacuum container and evacuate it for 30- Remove the air bubbles inside the mixture for 35 minutes; pour the air-removed mixture into a mold and place it horizontally, seal it, and solidify it while rotating around the horizontal axis. When the rotation speed of the mold around the axis is less...

specific Embodiment approach 2

[0035] The method of the present invention prepares as figure 2 Shown is a magnetorheological elastomer with mostly magnetic particles distributed around the circumference of a silicone rubber matrix. Prepare raw materials according to the ratio of 20% silicone rubber, 60% carbonyl iron powder, and 20% plasticizer, and place the prepared silicone rubber and carbonyl iron powder in a vacuum drying oven for 2 hours at 80°C; Add the uniform mixture of the two to the fluid silicone rubber raw material and stir it with a high-speed mixer for 10-15 minutes to make the magnetic particles evenly distributed in the rubber matrix; after stirring evenly, put the mixture into a vacuum container and evacuate it for 30- Remove the air bubbles inside the mixture for 35 minutes; pour the air-removed mixture into a mold and place it horizontally, and solidify while rotating. When the rotation speed of the mold around the axis is greater than 200r / min, the centrifugal force on the magnetic pa...

specific Embodiment approach 3

[0037] The method of the invention is used to prepare the magnetorheological elastomer in which the magnetic particles are randomly distributed in the radial direction in the silicone rubber matrix. Prepare raw materials according to the ratio of 20% silicone rubber, 60% carbonyl iron powder, and 20% plasticizer, and place the prepared silicone rubber and carbonyl iron powder in a vacuum drying oven for 2 hours at 80°C; Add the uniform mixture of the two to the fluid silicone rubber raw material and stir it with a high-speed mixer for 10-15 minutes to make the magnetic particles evenly distributed in the rubber matrix; after stirring evenly, put the mixture into a vacuum container and evacuate it for 30- Remove the air bubbles inside the mixture for 35 minutes; pour the air-removed mixture into a mold and place it horizontally, and solidify while rotating. Controlling the rotation speed of the mold around the central axis and its variation, that is, the rotation speed-time cur...

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Abstract

The invention discloses a preparation method of a magnetorheological elastomer for controlling the radial distribution of magnetic particles. The preparation method comprises the following steps: (1)mixing the magnetic particles with auxiliary agents uniformly, adding the obtained mixture to a fluid-state rubber material, and performing stirring through a high speed mixer so as to achieve uniformdistribution of the magnetic particles in the rubber matrix; (2) stirring the mixture evenly, putting the mixture in a vacuum container, and performing vacuuming so as to remove air bubbles inside the mixture; and (3) pouring the mixture obtained in the step (2) into a cylindrical mold, sealing the mold, putting the sealed mold horizontally so as to make the mold rotate along the horizontal axisand achieve curing and rotation of the mixture at the same time, and adjusting the rotation speed of the mold and the change rule of the rotation speed so as to control the radial distribution of themagnetic particles in the rubber matrix. The method which is capable of achieving the distribution of the magnetic particles in the rubber matrix through control on the rotation speed of the mold hassimple operation, easy implementation and greatly-reduced cost.

Description

technical field [0001] The invention discloses a preparation method of a magnetorheological elastic body which controls the radial distribution of magnetic particles, and belongs to the field of magnetorheological materials. Background technique [0002] Magnetorheological elastomer is a new kind of smart material. Micron-scale magnetic particles are mixed into rubber matrix and cured in a magnetic field environment, so that the ferromagnetic particles in the matrix have a chain or columnar structure. Under the action of an external magnetic field, the performance of magnetorheological elastomers will change greatly. Magnetorheological elastomers have the characteristics of fast response, controllability and reversibility. Therefore, it has broad application prospects in the fields of automobile and construction. [0003] In the past, in order to make the magnetic particles have a chain or columnar structure in the rubber matrix and make the magnetorheological elastomer ani...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/04C08L7/00C08K3/08C08K9/02
CPCC08K3/08C08K9/02C08K2201/01C08L83/04C08L7/00
Inventor 郭训忠王辉吴聪
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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