Deformable-variable stiffness dual-function magnetic intelligent material as well as preparation method and application thereof

A smart material and dual-function technology, applied in the field of smart materials, dual-function magnetorheological elastomer smart materials and their preparation, can solve the problems of poor actuation performance, single function, non-adjustable, etc., and achieve a simple and easy preparation method , wide application prospects and low cost

Pending Publication Date: 2021-11-02
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The main purpose of the present invention is to provide a deformation-variable stiffness that can change its shape under the excitation of an alternating magnetic field and change its modulus under the excitation of a constant magnetic field Dual-functional magnetic smart material and its preparation method, thereby overcoming the low modulus and non-adjustable modulus of existing deformable magnetic smart materials; conventional magnetorheological elastomer materials have poor actuation performance, difficulty in deformation, and single function. deficiencies in

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  • Deformable-variable stiffness dual-function magnetic intelligent material as well as preparation method and application thereof
  • Deformable-variable stiffness dual-function magnetic intelligent material as well as preparation method and application thereof
  • Deformable-variable stiffness dual-function magnetic intelligent material as well as preparation method and application thereof

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preparation example Construction

[0062] As another aspect of the technical solution of the present invention, it relates to a method for preparing the deformable-variable stiffness dual-functional magnetic smart material, which includes:

[0063] Provide a mixed prepolymer containing soft magnetic nanoparticles, low boiling point liquid and silicone rubber;

[0064] The mixed prepolymer is placed in a constant magnetic field, the soft magnetic nanoparticles are magnetized and arranged in an orderly manner, and a chain structure is formed in the direction of the magnetic field to obtain an anisotropic silicone rubber prepolymer;

[0065] The silicone rubber prepolymer is completely cured, the chain structure of the soft magnetic nanoparticles is preserved, and a deformable-variable stiffness dual-functional magnetic smart material is obtained.

[0066] In some preferred embodiments, the magnetic smart material prepared above is placed in an alternating magnetic field, and the soft magnetic nanoparticles genera...

Embodiment 1

[0080] (1) Weigh 1.5g of iron ferric oxide nanoparticles and 2g of absolute ethanol solution, mix it into 5g of Econflex 00-30 silicone rubber agent A, and mix it fully for 10 minutes to obtain premixed agent A;

[0081] (2) Weigh 1.5g of iron ferric oxide nanoparticles and 2g of absolute ethanol solution and mix it into 5g of Econflex 00-30 silicone rubber agent B, and mix thoroughly for 10min to obtain premixed agent B;

[0082] (3) Evenly mix the premixed agent A and the premixed agent B and then place it in a constant magnetic field for 5 hours; after the silicone rubber prepolymer is completely cured, remove the magnetic field to obtain a deformable-variable stiffness double Functional magnetic smart materials;

[0083] (4) Place the magnetic smart material sample obtained above in an alternating magnetic field with a frequency of 30 kHz. After 60 seconds, it can be seen that the magnetic smart material begins to expand and deform. like Figure 2-Figure 5 As shown, the su...

Embodiment 2

[0085] (1) Weigh 3.5g of iron ferric oxide nanoparticles and 0.25g of deionized water, mix it into 5g of Econflex 00-30 silicone rubber agent A, and mix it fully for 20min to obtain the premixed agent A;

[0086] (2) Weigh 3.5g of iron ferric oxide nanoparticles and 0.25g of deionized water and mix it into 5g of Econflex 00-30 silicone rubber agent B, and mix thoroughly for 20min to obtain premixed agent B;

[0087] (3) Evenly mix the premixed agent A and the premixed agent B and then place it in a constant magnetic field for 5 hours; after the silicone rubber prepolymer is completely cured, remove the magnetic field to obtain a deformable-variable stiffness double Functional magnetic smart materials;

[0088] (4) After placing the magnetic smart material sample obtained above in an alternating magnetic field with a frequency of 30 kHz for 50 seconds, obvious expansion and deformation can be seen. like Figure 6-Figure 9 As shown, the surface temperature of the magnetic smar...

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Abstract

The invention discloses a deformable-variable stiffness dual-function magnetic intelligent material as well as a preparation method and application thereof. The magnetic intelligent material comprises a dispersion phase and a dispersion medium, the dispersion phase is uniformly dispersed in the dispersion medium, the dispersion phase comprises soft magnetic nanoparticles and a low-boiling-point liquid, and the dispersion medium is a silicone rubber prepolymer. The preparation method comprises the following steps: placing a mixed prepolymer containing soft magnetic nanoparticles, low-boiling-point liquid and silicone rubber in a constant magnetic field, and magnetizing the soft magnetic nanoparticles to present a chain-like ordered structure in the direction of the magnetic field, so as to prepare an anisotropic silicone rubber prepolymer; curing, so that the chain structure of the soft magnetic nanoparticless is stored, and the deformable-variable stiffness dual-function magnetic intelligent material is obtained. The deformation-variable stiffness dual-function magnetic intelligent material can realize dual-function coordination of complex driving and variable mechanical properties, and is good in stability, multiple in application scene and wide in prospect, the preparation method is simple and easy to implement, the cost is low, and the material can be recycled.

Description

technical field [0001] The invention relates to an intelligent material, in particular to a dual-functional magnetorheological elastomer intelligent material capable of changing shape under the excitation of an alternating magnetic field and changing its modulus under the excitation of a constant magnetic field and a preparation method thereof, which belongs to a new type Composite technology field. Background technique [0002] Smart materials refer to materials with intelligent features that perceive environmental stimuli (such as electricity, light, heat, stress, magnetism, etc.), analyze, process, and judge them, and take certain measures to respond appropriately. As the name suggests, magnetic smart materials refer to smart materials that can respond to magnetic field stimulation. [0003] At present, magnetorheological elastomers are one of the most cutting-edge smart materials. When an external magnetic field is applied, the ferromagnetic particles in the magnetorheo...

Claims

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Application Information

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IPC IPC(8): C08L83/04C08K3/22
CPCC08L83/04C08K2003/2275C08K2201/011C08K2201/01C08L2205/025C08K3/22
Inventor 程昱川方明权邵迎春赵自辉龙菲李志祥郭建军孙爱华高青青许高杰
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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