Preparation method of magneto-rheological elastomer with programmable magneto-deformation

A magnetorheological elastomer and deformation technology, which is applied in the direction of piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, generators/motors, etc., can solve the problems of single driving type and difficult deformation control , to achieve the effects of rich driving ability, easy molding, easy industrialization and commercialization

Active Publication Date: 2019-05-28
CHONGQING UNIV
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

At present, the magneto-rheological elastomer has the disadvan

Method used

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preparation example Construction

[0017] The preparation method of the magnetorheological elastomer with programmable magnetostriction in this embodiment includes the following steps:

[0018] a. Print magnetic short fibers with specific distribution and orientation through a 3D printer, and apply a magnetic field during the printing process to regulate the magnetic domains of the short fibers; with the help of finite element simulation software and 3D drawing tools (such as 3Dmax, Solidworks ) to design the distribution and orientation of magnetic short fibers. According to the design results, the magnetic short fibers inside the magnetorheological elastomer are drawn into 3D files, and the files are imported into the slicing software of the 3D printer for slicing programming, and then the drawn magnetic short fibers and molds are printed on the 3D printer. A magnetic field drive device is installed on the nozzle of the 3D printer, and the magnetic domain of the magnetic short fiber is designed during the pri...

Embodiment 1

[0027] Preparation of the magnetic wire: the weight percent of the raw material of the magnetic wire is: 30% of carbonyl iron powder particles, 69.5% of thermoplastic polyurethane, and 0.5% of silane coupling agent. Mix carbonyl iron powder with thermoplastic polyurethane, add silane coupling agent to improve the interface between the particles and the matrix, stir the mixture mechanically for half an hour, then place it in a hot-melt mixer to fully mix, and squeeze the mixture out of the nozzle of the mixer. Wire and cooled to form a magnetic wire.

[0028] Design and production of magnetic short fibers: with the help of finite element simulation software, first draw the distribution and orientation of the magnetic short fibers to be printed into 3D files in 3D drawing software (3Dmax, Solidworks), and import the files into slices of 3D printers Slicing programming in the software, (the above is the prior art, not repeat them one by one here), then on the 3D printer, the magn...

Embodiment 2

[0032]Preparation of the magnetic wire: the weight percent of the raw material of the magnetic wire is: 49.% of NdFeB particles, 49.5% of polylactic acid, and 1% of silane coupling agent. First, mix the NdFeB particles with the polylactic acid particles, then add a small amount of silane coupling agent to improve the interface between the particles and the matrix, stir the mixture mechanically for half an hour, and then place it in a hot melt mixer for thorough mixing. The mixture is extruded and drawn from the nozzle of the mixer and cooled to form a magnetic wire.

[0033] Design and production of magnetic short fibers: with the help of finite element simulation software, first draw the distribution and orientation of the magnetic short fibers to be printed into 3D files in 3D drawing software (3Dmax, Solidworks), and import the files into slices of 3D printers Slice and program in the software, and then print the drawn magnetic short fibers and molds on the 3D printer. Duri...

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Abstract

The invention discloses a preparation method of a magneto-rheological elastomer with programmable magneto-deformation, which comprises the following steps: a, printing magnetic short fibers with specific distribution and orientation on a magnetic wire rod through a 3D printer, and applying a magnetic field in the printing process to regulate and control the magnetic domains of the short fibers; and b, packaging the magnetic short fibers printed in the step a by using silicone rubber, and curing to prepare a magneto-rheological elastomer material with anisotropic magnetic moment inside. The magnetic short fibers with arbitrary distribution and orientation can be printed by using the 3D printer; therefore, the magnetic moment of the magneto-rheological elastomer under the magnetic field canbe designed, any magneto-deformation property can be obtained, the programmable deformation driving capacity of the magneto-rheological elastomer is achieved by designing the magnetic moment in the magneto-rheological elastomer, and the magneto-rheological elastomer is endowed with rich driving capacity.

Description

technical field [0001] The invention relates to the field of magnetically controlled intelligent materials, in particular to a preparation method of a magnetorheological elastic body with programmable magneto-induced deformation applied to soft robots or flexible actuators. Background technique [0002] Magneto-rheological elastomer is a kind of magnetically controlled intelligent material prepared by dispersing micron-sized magnetic particles into polymer elastomer, and has excellent magnetically controlled mechanical properties. Magneto-rheological deformation is an important magneto-controlled mechanical property of magnetorheological elastomers. Under a magnetic field, magnetorheological elastomers can undergo continuous, rapid and reversible magneto-induced deformation. It is used in flexible sensing, soft robots, flexible drives, etc. It has excellent application prospects. The magneto-induced deformation of magnetorheological elastomers is mainly derived from magneti...

Claims

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Application Information

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IPC IPC(8): H02N2/00
Inventor 綦松余淼浮洁朱秘谢远鹏李旺
Owner CHONGQING UNIV
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