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Foam metal-based multi-porous-channel IPMC electrically driven material and preparation method therefor

An electric actuation material, metal foam technology, applied in the material selection of piezoelectric devices or electrostrictive devices, the manufacture/assembly of piezoelectric/electrostrictive devices, the selection of device materials, etc., can solve the problem of hindering ion Liquid migration and other issues, to achieve the effect of wide frequency response range and stable output performance

Active Publication Date: 2017-05-31
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

But the diameter of ionic liquids is about 1.5 nm (Chmiola J, YushinG, Gogotsi Y, Portet C, Simon P and Taberna P L 2006 Anomalous increase incarbon capacity at pore sizes less than 1 nanometer Science 313 1760–3; Simon P and Gogotsi Y 2008 Materials for electrochemical capacitors Nat.Mater. 7 845–54.), 3 times the diameter of water molecules (0.4 nm), and the migration channels suitable for water molecules in the IPMC matrix Nafion membrane are 1~2 nm, so the channels of this size Greatly hampers the migration of ionic liquids

Method used

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  • Foam metal-based multi-porous-channel IPMC electrically driven material and preparation method therefor
  • Foam metal-based multi-porous-channel IPMC electrically driven material and preparation method therefor
  • Foam metal-based multi-porous-channel IPMC electrically driven material and preparation method therefor

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Embodiment 1

[0034] The preparation steps of the porous metal-based IPMC electro-actuated material are as follows: figure 1 As shown, the details are as follows:

[0035] (1) Preparation of foam metal copper embedded Nafion membrane:

[0036] Pour 16 ml Nafion solution and 4 ml dimethylformamide (DMF) into the casting mold. The purpose of adding DMF is to slow down the volatilization of the solvent, thereby preventing Nafion from cracking during the solidification process; then mix the solution with a magnetic stirrer Stir to make the solution evenly mixed, and ultrasonically oscillate to remove the bubbles in the solution; then, put the foam metal copper into the casting mold, and put the casting mold into a constant temperature drying oven to heat: first, the solution is heated at 70 °C for 48 h to evaporate to form a thin film , and then the temperature was raised continuously to increase the rigidity of the film, and finally annealed at 150 °C for 8 minutes to remove the residual stre...

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Abstract

The invention discloses a foam metal-based multi-porous-channel IPMC electrically driven material and a preparation method therefor. A continuous and controllable porous channel structure is included in an IPMC substrate film; the porous channel structure is obtained by a method of embedding foam metal into a Nafion substrate film, casting and shaping and then removing; the dimension of the porous channel is determined by the dimension of the foam metal; compared with a conventional casted Nafion film, the dimension of the pore channels for migration of water molecules is 1-2nm, which is not suitable for migration of ionic liquid with relatively large dimensions; the dimension of the foam metal-based multi-porous-channel Nafion film disclosed by the invention is larger than that of the ionic liquid, so that migration of ionic liquid under an effect of an external electric field can be promoted, thereby greatly improving IPMC driving stability; and displacement is not lowered after 5h of continuous actuation in the air.

Description

technical field [0001] The invention relates to a porous metal-based IPMC electric actuation material and a preparation method thereof, belonging to the field of intelligent materials. Background technique [0002] IPMC (Ionic Polymer Metal Composite) is an ionic EAP material. It is an organic-inorganic composite material obtained by depositing platinum (Pt), gold (Au) and other precious metals on the surface of the ion-exchange polymer film substrate. Larger deformations occur at low voltages due to the migration of hydrated cations. IPMC has the advantages of light weight, low driving voltage, large displacement, no noise, flexibility, and high driving energy density. Its deformation capacity is more than 100 times that of electrical ceramics, and it also greatly exceeds shape memory alloys in terms of quality, response and elasticity. Micro-device drivers (such as in-body detection robots, opto-electromechanical systems, micro-robots, etc.) have great application potenti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L41/18H01L41/37H10N30/85H10N30/092
CPCH10N30/852H10N30/092
Inventor 何青松于敏刘志刚姬科举戴振东
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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