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Magneto-rheological viscoelastic fluid and preparation method thereof

A viscoelastic and magnetorheological technology, applied in lubricating compositions, petroleum industry, etc., can solve the problem of no compressible magnetorheological fluid material, etc., achieve good static stability, wide temperature adaptability range, stability good effect

Inactive Publication Date: 2013-04-10
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These new magnetorheological materials are all changing the matrix materials used to disperse ferromagnetic particles. For example, magnetorheological esters aim to solve the settlement problem, and magnetorheological elastomers aim to solve settlement and be used for variable stiffness control. No material with compressible magnetorheological fluid

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] In the magnetorheological viscoelastic fluid of this embodiment, the fluid raw materials include the following components by weight percentage: 50% of hydroxyl iron powder, 45% of methyl siloxane, 4% of phenyl siloxane, 0.1% of basic catalyst, silicon 0.2% phosphate ester, 0.2% hexamethyldisiloxane, 0.2% thixotropic agent, 0.3% lubricant; hydroxyl iron powder includes spherical and ellipsoidal hydroxyl iron powder, particle size is 10~20 microns .

[0021] The preparation method of the magnetorheological viscoelastic fluid of the present embodiment comprises the following steps:

[0022] a. Carry out surface purification and activation treatment to hydroxy iron powder: add hydroxy iron powder and lubricant to the ball mill tank of the ball mill according to the set weight percentage, then add isopropanol with a weight of 3% of hydroxy iron powder at 150 m / Ball milling at the same ball milling speed for 40 minutes; then place the ball milled mixture in a vacuum drying ...

Embodiment 2

[0032] For the magnetorheological viscoelastic fluid of this embodiment, the fluid raw materials include the following components by weight percentage: 15% of hydroxyl iron powder, 81.4% of methyl siloxane, 3% of phenyl siloxane, 0.1% of basic catalyst, silicon 0.1% phosphate ester, 0.1% hexamethyldisiloxane, 0.1% thixotropic agent, 0.2% lubricant; hydroxyl iron powder includes spherical and ellipsoidal hydroxyl iron powder, particle size is 20~30 microns ; The thixotropic agent is an organic bentonite thixotropic agent made of a compound of inorganic minerals and organic ammonium and inserted into an organic covering agent by ion exchange technology using bentonite as a raw material.

[0033] The preparation method of the magnetorheological viscoelastic fluid of the present embodiment comprises the following steps:

[0034] a. Carry out surface purification and activation treatment to hydroxy iron powder: add hydroxy iron powder and lubricant to the ball mill tank of the ball...

Embodiment 3

[0044] For the magnetorheological viscoelastic fluid of this embodiment, the fluid raw materials include the following components by weight percentage: 70% of hydroxyl iron powder, 24.4% of methyl siloxane, 4% of phenyl siloxane, 0.2% of basic catalyst, silicon 0.3% phosphate ester, 0.3% hexamethyldisiloxane, 0.3% thixotropic agent, 0.5% lubricant; hydroxyl iron powder includes spherical and ellipsoidal hydroxyl iron powder, particle size is 30~40 microns ; The thixotropic agent is an organic bentonite thixotropic agent made of a compound of inorganic minerals and organic ammonium and inserted into an organic covering agent by ion exchange technology using bentonite as a raw material.

[0045] The preparation method of the magnetorheological viscoelastic fluid of the present embodiment comprises the following steps:

[0046] a. Carry out surface purification and activation treatment to hydroxy iron powder: add hydroxy iron powder and lubricant into the ball mill tank of the ba...

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Abstract

The invention discloses a magneto-rheological viscoelastic fluid and a preparation method thereof. The fluid raw materials comprise the following components in percentage by weight: 15-70% of hydroxy iron powder, 25-80% of methylsiloxane, 3-4% of phenyl siloxane, 0.1-0.2% of basic catalyst, 0.1-0.3% of neutralizer, 0.1-0.3% of blocking agent, 0.1-0.3% of thixotropic agent and 0.2-0.5% of lubricant. The magneto-rheological viscoelastic fluid has compressibility, can improve the wear resistance of the magneto-rheological plaster, so as to prolong the service life; zero magnetic field viscosity of the carrier fluid is higher, no occurrence of sedimentation or agglomeration happens to the suspended phase for a long time, thereby having a favorable static stability; the carrier medium and the additive have a wide range of temperature adaptation, the magneto-rheological viscoelastic fluid material has a favorable stability in a temperature range of minus 90 to 250 DEG C; at a shear rate of 300 1 / second, the magnetic induction intensity of the magneto-rheological viscoelastic fluid is 0-0.6T, the variation range of shear stress is 75-105KPa, and the viscosity of the zero magnetic field is 4.5-6Pa.S.

Description

technical field [0001] The invention relates to a novel magnetorheological material used for vibration and impact control isolation devices in the fields of vehicle engineering, aerospace engineering, naval engineering, ocean engineering, etc., and in particular to a magnetorheological viscoelastic fluid and a preparation method thereof. Background technique [0002] Since the advent of magnetorheological materials (Magneto-rheological materials) in the 1940s, especially since it has been highly valued since the 1990s, it is now showing a booming research scene. The principle of magnetorheological fluid (MRF) is that magnetizable particles are dispersed in the carrier liquid, and certain additives are added to improve its anti-sedimentation performance, anti-agglomeration performance and wear resistance. In the external magnetic field, the rheological controllable effect of millisecond scale is exhibited. This controllable characteristic has broad application prospects in t...

Claims

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Application Information

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IPC IPC(8): C10M169/04C10N40/14
Inventor 廖昌荣谢磊周治江鞠锐袁四美
Owner CHONGQING UNIV
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