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Magnetorheological elastomer with high damping properties and strength and method for its preparation

A magnetorheological elastomer and high damping technology, which is applied to springs made of plastic materials, mechanical equipment, low internal friction springs, etc., can solve vibration reduction that cannot meet high damping, wide effective damping temperature range and high mechanical strength Need, the effective damping temperature is not wide enough, the mechanical strength is not enough, etc., to achieve the effect of broadening the effective damping temperature range, easy molding, and improving the intrinsic damping

Active Publication Date: 2018-01-23
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When these substrates are used alone, the damping factor is low, the effective damping temperature is not wide enough, and the mechanical strength is not enough. When used in the application field of high damping materials, they cannot meet the requirements of high damping, wide effective damping temperature range and high mechanical strength. Vibration reduction needs

Method used

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  • Magnetorheological elastomer with high damping properties and strength and method for its preparation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The epoxy resin / polyurethane interpenetrating network magnetorheological elastomer involved in the preparation of Example 1

[0021] Raw material preparation: All raw materials were dried in a vacuum oven at 80°C for 2 hours to remove water before use.

[0022] The preparation method is as follows, and the specific process is shown in figure 1 :

[0023] Step 1, phthalic anhydride diethylene glycol copolymer and 2,6-toluene diisocyanate are mixed and stirred for polymerization reaction to generate polyurethane prepolymer;

[0024] Step 2, 5% brominated epoxy resin by mass, 20% polyurethane prepolymer, 65% carbonyl iron powder, 7% plasticizer, 1% curing agent, 2% reinforcing particles, weighing each component raw materials;

[0025] Step 3, adding carbonyl iron powder and reinforcing granular carbon black into the epoxy resin and fully stirring to form a uniform mixture;

[0026] Step 4, mix and stir the polyurethane prepolymer prepared in step 2 and the mixture in s...

Embodiment 2

[0029] The epoxy resin / polyurethane interpenetrating network magnetorheological elastomer involved in the preparation of Example 2

[0030] Raw material preparation: All raw materials were dried in a vacuum oven at 80°C for 2 hours to remove water before use.

[0031] The preparation method is as follows, and the specific process is shown in figure 1 :

[0032] Step 1, mixing and stirring a mixture of 2,4-diphenylmethane diisocyanate and 4,4-diphenylmethane diisocyanate (each accounting for 50%) and castor oil to generate a polyurethane prepolymer;

[0033] Step 2, by mass ratio bisphenol A type epoxy resin 10%, polyurethane prepolymer 20%, carbonyl iron powder 63%, plasticizer 5%, curing agent is 1%, catalyst 1%, weigh each component raw materials;

[0034] Step 3, adding carbonyl iron powder into the epoxy resin and fully stirring to form a uniform mixture;

[0035] Step 4, mix and stir the polyurethane prepolymer prepared in step 2 and the mixture in step 3 to form an i...

Embodiment 3

[0038] The epoxy resin / polyurethane interpenetrating network magnetorheological elastomer involved in the preparation of Example 3

[0039] Raw material preparation: All raw materials were dried in a vacuum oven at 80°C for 2 hours to remove water before use.

[0040] The preparation method is as follows, and the specific process is shown in figure 1 :

[0041] Step 1, mixing and stirring a mixture of 2,4-diphenylmethane diisocyanate and 4,4-diphenylmethane diisocyanate (each accounting for 50%) and castor oil to generate a polyurethane prepolymer;

[0042] Step 2, by mass ratio novolak epoxy resin 8%, polyurethane prepolymer 16%, carbonyl iron powder 60%, plasticizer 10%, curing agent is 1%, reinforcing particle 5%, weigh each component raw material ;

[0043] Step 3, adding carbonyl iron powder and reinforcing granular graphite into the epoxy resin and fully stirring to form a uniform mixture;

[0044] Step 4, mix and stir the polyurethane prepolymer prepared in step 2 a...

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Abstract

The invention belongs to the technical field of intelligent materials applied to vibration reduction and sound absorption, in particular to a magnetorheological elastomer with high damping and a preparation method thereof. The purpose of the present invention is to improve the damping characteristics and mechanical properties of the original polyurethane-based magnetorheological elastomer by preparing an epoxy resin / polyurethane interpenetrating network matrix on the basis of the polyurethane-based magnetorheological elastomer, while ensuring a higher magnetorheological effect. The high-damping magnetorheological elastomer provided by the present invention is prepared from the following ingredients by weight ratio: It is prepared from the following raw materials by weight ratio: epoxy resin 5%-10%, polyurethane prepolymer 10% ‑20%, carbonyl iron powder 60%‑70%, plasticizer 4.5%‑10%, curing agent 0.5%‑1%. The magnetorheological elastomer prepared by the invention can meet the application requirements of high damping, high mechanical strength and high magnetorheological effect, and can be applied to the fields of vibration reduction, sound absorption and intelligent damping.

Description

technical field [0001] The invention belongs to the technical field of intelligent materials applied to vibration reduction and sound absorption, in particular to a magnetorheological elastomer with high damping and a preparation method thereof. Background technique [0002] As an important member of magnetorheological materials, magnetorheological elastomers are a new type of magnetically controlled smart materials. It is composed of polymer matrix, magnetic particles and additives. After an external magnetic field is applied, the modulus (stiffness) and damping properties of magnetorheological elastomers can be reversibly controlled in real time, and have broad application prospects in vibration isolation buffering, magnetic control sensing, vibration reduction and sound absorption, and other fields. Magnetorheological elastomers have both the advantages of magnetorheological materials and polymer elastomers. It overcomes the shortcomings of poor sedimentation stability o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/04C08L75/14C08L63/00C08K3/18C08K3/04C08K5/12F16F1/36
Inventor 余淼綦松浮洁杨平安刘术志朱秘
Owner CHONGQING UNIV
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