Magnetic field control method adapting to distortional magneto-rheological elastomer particle structure

Abstract

The invention discloses a magnetic field control method adapting to a distortional magneto-rheological elastomer particle structure in the technical field of an intelligent material. According to the method, on the basis of deformation condition of a magneto-rheological elastomer in the work state, when the magneto-rheological elastomer is prepared, various factors influencing the magnetic field space distribution and the effect of a rotary magnetic field on the particle chain trend are synthetically considered; the design thoughts that the orthogonal magnetic field combination is adopted, in addition, the magnetic field intensity proportion is controlled, the pole shoe shape and the opposite arrangement orientation are designed, a mold and the magneto-rheological elastomer are combined into a section of magnetic path, in addition, the orientation of the magneto-rheological elastomer is controlled, a magnetic field interference block interfere the distribution and direction of magnetic force lines, an orthorhombic rotary magnetic field deflects a particle chain, and the like are adopted; a curing magnetic field is designed so that the shape of the particle structure formed in the magneto-rheological elastomer simulates the state of a linear shape particle chain obtained in the original preparation method after the deformation. The magneto-rheological elastomer prepared by the method has the advantages that the performance of the magneto-rheological elastomer can be improved, and the use range of the magneto-rheological elastomer is enlarged.

Description

technical field [0001] The invention relates to the technical field of intelligent materials, in particular to a magnetic field control method for a magnetorheological elastomer particle structure adaptable to deformation. Background technique [0002] Magnetorheological elastomers are a type of polymer-based composite material formed by uniformly mixing uncrosslinked polymers and soft magnetic microparticles, and crosslinking and curing polymers in a magnetic field environment. The high molecular polymer is called the matrix material, and the soft magnetic microparticles are called the filling material or magnetic particles. During the curing process, the magnetic particles are magnetized under the action of an external magnetic field and arranged in an orderly manner along the direction of the magnetic field, forming a particle chain structure and being fixed. The preparation process of magnetorheological elastomer mainly includes polymer coating of magnetic particles, mi...

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Problems solved by technology

Current research is devoted to improving the field-induced elastic modulus or the relative change rate of elastic modulus of magnetorheological elastomers, but because these indicators cannot fully meet the actual work requirements, magnetorheological elastomers have not yet entered large-scale applications

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