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Polydimethylsiloxane/liquid metal composite material and preparation method and application thereof

A technology of polydimethylsiloxane and dimethylsiloxane, applied in polydimethylsiloxane/liquid metal composite material and its preparation, polydimethylsiloxane/liquid metal composite material in The application field of magnetorheological stiffness joints can solve the problems of load resistance and inability to apply magnetorheological stiffness mechanisms, etc., and achieve the effects of fast response speed, outflow prevention, and large adjustment range

Inactive Publication Date: 2020-03-06
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, in order to solve the technical problem that existing magnetorheological materials are in a viscous state and are not load-resistant, and cannot be applied to magnetorheological stiffness mechanisms, the present invention provides a polydimethylsiloxane / liquid metal Composite materials and their preparation methods and applications

Method used

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  • Polydimethylsiloxane/liquid metal composite material and preparation method and application thereof
  • Polydimethylsiloxane/liquid metal composite material and preparation method and application thereof
  • Polydimethylsiloxane/liquid metal composite material and preparation method and application thereof

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preparation example Construction

[0042] The preparation method of the above polydimethylsiloxane / liquid metal composite material, the steps are as follows:

[0043] Step 1. Weigh the iron particles and the gallium indium tin liquid metal according to the ratio, dissolve them in the hydrochloric acid ethanol solution, stir at 800-1000rpm for 5-8min, filter, and obtain the magnetorheological material. The effect diagram is as follows Figure 4 Shown

[0044] Step 2: Embedding the magnetorheological material in the cavity of the housing 1 to obtain a polydimethylsiloxane / liquid metal composite material.

[0045] In the above technical solution, the stirring speed is preferably 1000 rpm and the stirring time is 6 minutes; the stirring equipment usually adopts a high-speed mixer.

[0046] In the above technical scheme, the hydrochloric acid ethanol solution can be obtained commercially, and the concentration of the hydrochloric acid is 1 mol / L.

[0047] The present invention also provides the application of the above-mentio...

Embodiment 1

[0050] Polydimethylsiloxane / liquid metal composite material, composed of shell 1 and core 2; shell 1 is a rectangular tube (length, width, and thickness: 100mm, 20mm, 8mm), and the material of shell 1 is poly Dimethylsiloxane; the core 2 is a solid cube (length, width, and thickness: 100mm, 16mm, 6mm, respectively), and the size of the outer contour matches the size of the cavity of the shell 1, and can fit into the cavity , The material of the housing 1 is a magnetorheological material, by dissolving iron particles (100 microns) and gallium indium tin liquid metal (gallium 68.5%wt, indium 21.5wt% and tin 10wt%) in a hydrochloric acid ethanol solution, stirring at 1000rpm for 6min , Filter, obtain;

[0051] In the magnetorheological material, the iron particles are 10wt%, 20wt%, 30wt%, 40wt%, 50wt% respectively.

Embodiment 2

[0053] Polydimethylsiloxane / liquid metal composite material, composed of shell 1 and core 2; shell 1 is a rectangular tube (length, width, and thickness: 100mm, 20mm, 8mm), and the material of shell 1 is poly Dimethylsiloxane; the core 2 is a solid cube (length, width, and thickness: 100mm, 16mm, 6mm, respectively), and the size of the outer contour matches the size of the cavity of the shell 1, and can fit into the cavity , The material of the shell 1 is a magnetorheological material, by dissolving iron particles (75 microns) and gallium indium tin liquid metal (gallium 68.5%wt, indium 21.5wt% and tin 10wt%) in a hydrochloric acid ethanol solution, stirring at 1000rpm for 5min , Filter, obtain;

[0054] In the magnetorheological material, the iron particles are 10wt%, 20wt%, 30wt%, 40wt%, 50wt% respectively.

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Abstract

The invention relates to a polydimethylsiloxane / liquid metal composite material and a preparation method and application thereof, and belongs to the technical field of composite materials. The technical problems are solved that an existing magnetorheological material is viscous and not resistant to loads and cannot be applied to a magnetorheological rigidity variation mechanism. The composite material is composed of a core body and a shell. The shell from polydimethylsiloxane is of a cylindrical structure. The core body is of a solid structure, the size of the outer contour of the core body ismatched with the size of a cavity of the shell, the core body can be exactly embedded into the cavity, and the core body is made from a magnetorheological material composed of iron particles and gallium-indium-tin liquid metal. According to the composite material, the rigidity range of the composite material can be adjusted by adjusting the percentage of the iron particles and the magnetic fieldintensity, the adjusting range is large, the response speed is high, the needed time is only based on millisecond, reversible change can be rapidly achieved, and the composite material is suitable forpreparing magnetorheological rigidity-variable joints.

Description

Technical field [0001] The invention belongs to the technical field of composite materials, and specifically relates to a polydimethylsiloxane / liquid metal composite material, and a preparation method and application thereof, and particularly relates to the application of the polydimethylsiloxane / liquid metal composite material in magnetorheological changes. Application in variable stiffness joints. Background technique [0002] With the increasing maturity of robotics technology, there are more and more human-centered robot applications such as wearable robots, rehabilitation robots, and prostheses, and the physical human-computer interaction between the user and the robot body has also increased. Flexible robots have also become an important development direction for future robots. As an important part of robot motion, variable stiffness joints have also become a hot research field at home and abroad. [0003] In order to improve the safety of human-computer interaction and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B25J17/00B25J17/02C22C28/00H01F1/44
CPCB25J17/00B25J17/02C22C28/00H01F1/447
Inventor 蔡月日孙卫于靖军
Owner BEIHANG UNIV
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