CN112520685B - Double-layer film actuator and preparation method thereof - Google Patents
Double-layer film actuator and preparation method thereof Download PDFInfo
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- CN112520685B CN112520685B CN202011400178.7A CN202011400178A CN112520685B CN 112520685 B CN112520685 B CN 112520685B CN 202011400178 A CN202011400178 A CN 202011400178A CN 112520685 B CN112520685 B CN 112520685B
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- 238000002360 preparation method Methods 0.000 title abstract description 12
- 239000000758 substrate Substances 0.000 claims abstract description 29
- 238000000034 method Methods 0.000 claims abstract description 19
- 229910052723 transition metal Inorganic materials 0.000 claims abstract description 18
- 150000003624 transition metals Chemical class 0.000 claims abstract description 16
- 229920006254 polymer film Polymers 0.000 claims abstract description 14
- 239000010408 film Substances 0.000 claims description 65
- 239000010410 layer Substances 0.000 claims description 34
- 239000000725 suspension Substances 0.000 claims description 19
- 239000002131 composite material Substances 0.000 claims description 14
- -1 polyethylene Polymers 0.000 claims description 13
- 238000001035 drying Methods 0.000 claims description 11
- 239000002904 solvent Substances 0.000 claims description 11
- 239000000395 magnesium oxide Substances 0.000 claims description 10
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 10
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 10
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 9
- 229910021645 metal ion Inorganic materials 0.000 claims description 9
- 238000005406 washing Methods 0.000 claims description 9
- 230000035484 reaction time Effects 0.000 claims description 8
- 239000004793 Polystyrene Substances 0.000 claims description 7
- 229920002223 polystyrene Polymers 0.000 claims description 7
- 238000011068 loading method Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000004743 Polypropylene Substances 0.000 claims description 5
- 229920001155 polypropylene Polymers 0.000 claims description 5
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 5
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 4
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Chemical compound [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 239000012266 salt solution Substances 0.000 claims description 4
- IATRAKWUXMZMIY-UHFFFAOYSA-N strontium oxide Chemical compound [O-2].[Sr+2] IATRAKWUXMZMIY-UHFFFAOYSA-N 0.000 claims description 4
- 229910001428 transition metal ion Inorganic materials 0.000 claims description 4
- 238000003828 vacuum filtration Methods 0.000 claims description 4
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000292 calcium oxide Substances 0.000 claims description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 3
- 229920001721 polyimide Polymers 0.000 claims description 3
- 239000010409 thin film Substances 0.000 claims description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 claims description 2
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 claims description 2
- 239000005751 Copper oxide Substances 0.000 claims description 2
- 229910002651 NO3 Inorganic materials 0.000 claims description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 2
- 229910019142 PO4 Inorganic materials 0.000 claims description 2
- 239000002033 PVDF binder Substances 0.000 claims description 2
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 239000004642 Polyimide Substances 0.000 claims description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 2
- 229910000431 copper oxide Inorganic materials 0.000 claims description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 2
- 239000010452 phosphate Substances 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims description 2
- 238000010345 tape casting Methods 0.000 claims description 2
- 239000011701 zinc Substances 0.000 claims description 2
- 239000011787 zinc oxide Substances 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims 1
- 239000002355 dual-layer Substances 0.000 claims 1
- 230000008859 change Effects 0.000 abstract description 9
- 230000007613 environmental effect Effects 0.000 abstract description 7
- 230000004044 response Effects 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 239000003513 alkali Substances 0.000 abstract description 2
- 239000008204 material by function Substances 0.000 abstract description 2
- 229910000000 metal hydroxide Inorganic materials 0.000 abstract description 2
- 150000004692 metal hydroxides Chemical class 0.000 abstract description 2
- 210000003205 muscle Anatomy 0.000 abstract description 2
- 239000007787 solid Substances 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 14
- 239000002105 nanoparticle Substances 0.000 description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- KBJMLQFLOWQJNF-UHFFFAOYSA-N nickel(ii) nitrate Chemical compound [Ni+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O KBJMLQFLOWQJNF-UHFFFAOYSA-N 0.000 description 5
- 230000000638 stimulation Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000007480 spreading Effects 0.000 description 3
- 238000003892 spreading Methods 0.000 description 3
- 229910000314 transition metal oxide Inorganic materials 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004070 electrodeposition Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- XTOOSYPCCZOKMC-UHFFFAOYSA-L [OH-].[OH-].[Co].[Ni++] Chemical compound [OH-].[OH-].[Co].[Ni++] XTOOSYPCCZOKMC-UHFFFAOYSA-L 0.000 description 1
- ZOIORXHNWRGPMV-UHFFFAOYSA-N acetic acid;zinc Chemical compound [Zn].CC(O)=O.CC(O)=O ZOIORXHNWRGPMV-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000009388 chemical precipitation Methods 0.000 description 1
- UFMZWBIQTDUYBN-UHFFFAOYSA-N cobalt dinitrate Chemical compound [Co+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O UFMZWBIQTDUYBN-UHFFFAOYSA-N 0.000 description 1
- 229910001981 cobalt nitrate Inorganic materials 0.000 description 1
- 229910000428 cobalt oxide Inorganic materials 0.000 description 1
- ASKVAEGIVYSGNY-UHFFFAOYSA-L cobalt(ii) hydroxide Chemical class [OH-].[OH-].[Co+2] ASKVAEGIVYSGNY-UHFFFAOYSA-L 0.000 description 1
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(ii) oxide Chemical compound [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 description 1
- 229920001940 conductive polymer Polymers 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- GDVKFRBCXAPAQJ-UHFFFAOYSA-A dialuminum;hexamagnesium;carbonate;hexadecahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Al+3].[Al+3].[O-]C([O-])=O GDVKFRBCXAPAQJ-UHFFFAOYSA-A 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229960001545 hydrotalcite Drugs 0.000 description 1
- 229910001701 hydrotalcite Inorganic materials 0.000 description 1
- 238000001027 hydrothermal synthesis Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 229910000483 nickel oxide hydroxide Inorganic materials 0.000 description 1
- BFDHFSHZJLFAMC-UHFFFAOYSA-L nickel(ii) hydroxide Chemical compound [OH-].[OH-].[Ni+2] BFDHFSHZJLFAMC-UHFFFAOYSA-L 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000004246 zinc acetate Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81B—MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES
- B81B7/00—Microstructural systems; Auxiliary parts of microstructural devices or systems
- B81B7/0009—Structural features, others than packages, for protecting a device against environmental influences
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81C—PROCESSES OR APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OR TREATMENT OF MICROSTRUCTURAL DEVICES OR SYSTEMS
- B81C1/00—Manufacture or treatment of devices or systems in or on a substrate
- B81C1/00015—Manufacture or treatment of devices or systems in or on a substrate for manufacturing microsystems
- B81C1/00134—Manufacture or treatment of devices or systems in or on a substrate for manufacturing microsystems comprising flexible or deformable structures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81B—MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES
- B81B2201/00—Specific applications of microelectromechanical systems
- B81B2201/03—Microengines and actuators
Abstract
The invention discloses a double-layer film actuator and a preparation method thereof, belonging to the fields of functional materials and soft robots. And a layer of regularly arranged metal hydroxide grows on the polymer film substrate in an oriented manner through a solid alkali self-sacrifice method to form a double-layer structure comprising a polymer film and transition metal hydroxide. The preparation method is simple, low in cost and capable of realizing large-scale preparation. The invention utilizes the difference of the response of the double-layer film to humidity, realizes rapid, obvious and stable deformation capability under the conditions of humidity change, heating, infrared light and the like, and can realize moving and grabbing objects through deformation control. Therefore, the method has important application value in the fields of flexible switches, artificial muscles, soft robots, environmental monitoring and the like.
Description
Technical Field
The invention belongs to the technical field of functional materials and soft robot application, and particularly relates to a double-layer film actuator and a preparation method thereof.
Background
The soft robot is a novel soft robot, and the driving mode mainly depends on the deformation of the used intelligent materials under the stimulation of electric field, pressure, magnetic field, chemical reaction, light, temperature, humidity and the like. As an effective intelligent material, the double-layer film actuator is characterized by a double-layer structure, and the actions of moving, grabbing and the like are finished by virtue of different deformations generated by two materials during stimulation. The research difficulty is the selection of sensitive materials and the design of a double-layer structure.
The transition metal hydroxide has a hydrotalcite layered structure, and the migration and the extraction of water molecules between layers can cause the change of the distance between the upper layer plate and the lower layer plate and the interlayer, so the transition metal hydroxide has high sensitivity to humidity, and is an ideal humidity actuator material. If the transition metal hydroxide is combined with a humidity insensitive membrane material, a thin film humidity actuator is obtained. The conventional transition metal hydroxide preparation methods such as chemical precipitation methods cannot control single-sided deposition on a substrate, and thus cannot obtain a double-layer structure. The hydrothermal method has higher requirements on the substrate due to higher temperature. It has been reported that films of nickel hydroxide/nickel oxyhydroxide (sci. Robot.,2018,3, eaat 4051), cobalt nickel hydroxide (ACS appl. Mater. Interfaces 2020,12,27,30557-30564) cobalt oxide/cobalt hydroxide composites (adv. Mater. Tec.2019,4 (12), 1900746) and the like can achieve humidity stimulus responses by electrodeposition on flexible metal substrates (thickness of about 1 micron). However, the preparation method is limited by the manufacturing process and cost of the ultrathin flexible metal substrate, and large-area preparation cannot be realized, but after the preparation method is replaced by a nonmetallic substrate, the directional growth of the transition metal oxide cannot be realized by adopting an electrodeposition method.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention aims to provide a method for preparing a double-layer film actuator, in particular to a method for forming a double-layer structure of the actuator by directionally growing transition metal hydroxide on a non-conductive polymer film substrate under the condition of room temperature, wherein the polymer film substrate is insensitive to humidity and the directionally grown transition metal hydroxide is extremely sensitive to humidity. The method is simple, low in cost and suitable for large-area preparation. The obtained composite film has humidity actuation response, realizes rapid, obvious and recoverable deformation capacity under the conditions of heating and infrared light, and can realize moving and grabbing objects through deformation control.
The technical scheme adopted by the invention is as follows:
the preparation method of the double-layer film actuator specifically comprises the following steps:
(1) Dispersing alkaline oxide powder in a solvent, and performing ultrasonic dispersion to obtain a suspension;
(2) Loading the suspension prepared in the step (1) on the surface of a polymer film substrate, wherein the coating amount is 0.1-10mg/cm 2 Then drying to prepare a composite film;
(3) Immersing the composite film prepared in the step (2) into a transition metal salt solution with the metal ion concentration of 0.01-1.0M to react for 0.1-12 hours;
(4) And (3) taking out the composite film after the reaction in the step (3), washing and drying to obtain the target double-layer film actuator consisting of the high polymer film and the transition metal hydroxide layer.
Further, the alkaline oxide in the step (1) comprises one or more of magnesium oxide, calcium oxide, strontium oxide, barium oxide, aluminum oxide, zinc oxide and copper oxide, the solvent is absolute ethyl alcohol, the concentration is 0.1-20mg/mL, and the ultrasonic dispersion time is 10-120 minutes.
Further, the loading method in the step (1) includes, but is not limited to, one of vacuum filtration, spraying and knife coating.
Further, the polymer film substrate in the step (2) includes, but is not limited to, any one of common films of polyethylene, polypropylene, polystyrene, polytetrafluoroethylene, polyvinylidene fluoride, polyimide and the like, wherein the thickness of the film is less than 100 micrometers, and the thickness of the transition metal hydroxide layer is 0.2-1 micrometers.
Further, the transition metal salt in the step (3) includes, but is not limited to, one or more of halide salt, nitrate, acetate, sulfate, and phosphate of transition metal, and the transition metal ion includes, but is not limited to, cu 2+ 、Ni 2+ 、Co 2+ 、Fe 2+ 、Mn 2+ 、Zn 2+ 、Fe 3+ 、Al 3+ One or more of the following.
Further, the basic oxide is magnesium oxide, and the transition metal ion is Ni 2+ And Fe (Fe) 2+ ，Ni 2+ /Fe 2+ The molar ratio is 8:2, the target double-layer film in the step (4) can grasp a weight with the mass of hydroxide being 2400 times or more through the change of the stimulation condition, and has unexpected technical effects.
Furthermore, the target double-layer film in the step (4) can be rapidly deformed under the conditions of humidity reduction, heating and infrared lamp irradiation, can be rapidly recovered after the stimulation condition is canceled, and can be applied to the fields of flexible switches, artificial muscles, soft robots, environment monitoring and the like.
The beneficial effects of the invention are as follows:
according to the invention, a layer of regularly arranged metal hydroxide is directionally grown on a polymer film substrate by a solid alkali self-sacrifice method, so that a double-layer structure of a polymer film and a transition metal oxide is formed. Specifically, the invention firstly coats alkaline oxide nano particles on the surface of a polymer film substrate, then dips the polymer film substrate into a transition metal mixed salt solution, and grows ultrathin flaky transition metal hydroxides which are regularly arranged on the surface of the substrate. The method is novel, the required process is simple, the production cost is low, the method is suitable for industrial large-area production, and the prepared double-layer film has excellent humidity stimulus response and stability, and can be applied to the fields of humidity actuation soft robots, environment monitoring and the like.
Compared with the prior art, the invention has the following beneficial effects: (1) The method is carried out at room temperature, large equipment is not needed, the energy cost is saved, and the production cost is reduced. (2) The transition metal oxide grows uniformly on one surface of the substrate, so that the uniformity of the performance of the brake is ensured. (3) The polymer film is used as the substrate, so that the flexibility of the substrate material is improved, the limitation of poor bending property of the metal substrate on the improvement of deformation performance is reduced, the production cost of the substrate is reduced, and large-area growth can be realized. (4) The double-layer film prepared by the method has humidity actuating performance and excellent moving and grabbing capabilities.
Drawings
FIG. 1 is a graph showing the Ni/Fe molar ratio of 8 in example 1: 2, digital photographs of the large-area double-layer film obtained.
FIG. 2 is a graph showing the Ni/Fe molar ratio of 8 in example 1: 2 SEM image of the surface of the resulting bilayer film.
FIG. 3 is a molar ratio of Ni/Fe 8 in example 1: 2, the deformation photo of the obtained double-layer film under the irradiation condition of an infrared lamp.
FIG. 4 is a graph showing the Ni/Fe molar ratio of 8 in example 1: 2, moving and grabbing the display diagram of the obtained double-layer film under the irradiation of an infrared lamp.
FIG. 5 is a photograph showing the deformation of the double-layered film obtained in example 2 under irradiation of an infrared lamp.
Detailed Description
The invention will be further illustrated by the following examples and examples of application, in conjunction with the accompanying drawings.
Example 1
(1) Commercial magnesium oxide nanoparticles were dispersed in absolute ethanol solvent and sonicated to give a 20mg/mL suspension.
(2) Spreading the suspension solution prepared in the step (1) on the surface of a polystyrene film substrate with a coating amount of 0.05mg/cm 2 And then dried at 60 degrees celsius.
(3) Immersing the composite film prepared in the step (2) into solutions with the metal ion concentration of 0.05M and different molar ratios (see table 1), wherein the reaction time at room temperature is 1 hour.
(4) And (3) taking out the film in the step (3), washing and drying to obtain a target double-layer film, controlling the change of the environmental humidity by irradiation of an infrared lamp, and observing the actuation condition of the target film.
TABLE 1
The area of 5 x 13cm can be seen clearly from the digital photograph of figure 1 2 And brown yellow substances uniformly grow on the surface of the polystyrene film.
The growth of the flaky hydroxide on the surface of the polystyrene film can be clearly seen by the electron microscope image of FIG. 2.
The ability to deform very sensitively under humidity changes can be seen by the double layer film of fig. 3.
The double-layer film in the infrared lamp switching process can realize movement and grabbing of heavy objects, the movement speed is 28 cm/min, and the weight grabbing weight is 2400 times of the weight of the hydroxide.
Example 2
(1) Commercial magnesium oxide nanoparticles were dispersed in absolute ethanol solvent and sonicated to give a 20mg/mL suspension.
(2) Spreading the suspension solution prepared in the step (1) on the surface of a polystyrene film substrate with a coating amount of 0.05mg/cm 2 And then dried at 60 degrees celsius.
(3) Immersing the composite film prepared in the step (2) into zinc acetate solution, wherein the concentration of metal ions is 0.05M, and the reaction time at room temperature is 1 hour.
(4) And (3) taking out the film in the step (3), washing and drying to obtain a target double-layer film, controlling the change of the environmental humidity by irradiation of an infrared lamp, and observing the actuation condition of the target film.
As can be seen from fig. 5, under this growth condition, the bilayer film has deformability under the influence of the infrared lamp.
Example 3
(1) Commercial magnesium oxide nanoparticles were dispersed in absolute ethanol solvent, and ultrasonic dispersion gave a 5mg/mL suspension.
(2) Loading the suspension solution prepared in the step (1) on the surface of a polystyrene microporous film substrate by a vacuum filtration method, wherein the coating amount is 0.05mg/cm 2 And then dried at 60 degrees celsius.
(3) Immersing the composite film prepared in the step (2) into nickel nitrate solution, wherein the concentration of metal ions is 0.05M, and the reaction time at room temperature is 1 hour.
(4) And (3) taking out the film in the step (3), washing and drying to obtain a target double-layer film, controlling the change of the environmental humidity by irradiation of an infrared lamp, and observing the actuation condition of the target film.
Example 4
(1) Commercial magnesium oxide nanoparticles were dispersed in absolute ethanol solvent and sonicated to give a 20mg/mL suspension.
(2) The suspension solution prepared in the step (1) is coated on the surface of a polypropylene film substrate in a coating amount of 0.2mg/cm 2 And then dried at 60 degrees celsius.
(3) Immersing the composite film prepared in the step (2) into nickel nitrate solution, wherein the concentration of metal ions is 0.05M, and the reaction time at room temperature is 1 hour.
(4) And (3) taking out the electrode in the step (3), washing and drying to obtain the target double-layer film.
Example 5
(1) Commercial magnesium oxide nanoparticles were dispersed in absolute ethanol solvent and sonicated to give a 20mg/mL suspension.
(2) Spreading the suspension solution prepared in the step (1) on the surface of a polyimide film substrate, wherein the coating amount is 0.2mg/cm 2 And then dried at 60 degrees celsius.
(3) Immersing the composite film prepared in the step (2) into nickel nitrate solution, wherein the concentration of metal ions is 0.05M, and the reaction time at room temperature is 1 hour.
(4) And (3) taking out the film in the step (3), washing and drying to obtain a target double-layer film, controlling the change of the environmental humidity by irradiation of an infrared lamp, and observing the actuation condition of the target film.
Example 6
(1) Commercial magnesium oxide nanoparticles were dispersed in absolute ethanol solvent and sonicated to give a 0.1mg/mL suspension.
(2) Loading the suspension solution prepared in the step (1) on the surface of a porous polypropylene film substrate by a vacuum filtration method, wherein the coating amount is 0.1mg/cm 2 And then dried at 60 degrees celsius.
(3) Immersing the composite film prepared in the step (2) into nickel nitrate solution, wherein the concentration of metal ions is 0.01M, and the reaction time at room temperature is 1 hour.
(4) And (3) taking out the film in the step (3), washing and drying to obtain a target double-layer film, controlling the change of the environmental humidity by irradiation of an infrared lamp, and observing the actuation condition of the target film.
Example 7
(1) Commercial calcium oxide nanoparticles were dispersed in absolute ethanol solvent, and ultrasonic dispersion gave a 20mg/mL suspension.
(2) Filtering the suspension solution prepared in the step (1) on the surface of a porous polypropylene film substrate, wherein the coating amount is 10mg/cm 2 And then dried at 60 degrees celsius.
(3) Immersing the composite film prepared in the step (2) into a cobalt nitrate and nickel nitrate solution, wherein the Ni/Co molar ratio is 5:5, the metal ion concentration was 1.0M, and the reaction time at room temperature was 12 hours.
(4) And (3) taking out the film in the step (3), washing and drying to obtain a target double-layer film, controlling the change of the environmental humidity by irradiation of an infrared lamp, and observing the actuation condition of the target film.
The above description is not intended to limit the invention, and it should be noted that: it will be apparent to those skilled in the art that various changes, modifications, additions or substitutions can be made without departing from the spirit and scope of the invention and these modifications and variations are therefore considered to be within the scope of the invention.
Claims (5)
1. A method of making a dual layer thin film actuator comprising the steps of:
(1) Dispersing basic oxide powder in a solvent to obtain a suspension;
(2) Loading the suspension prepared in the step (1) on the surface of a polymer film substrate, and then drying to prepare a composite film;
(3) Immersing the composite film prepared in the step (2) into a transition metal salt solution for reaction;
(4) Taking out the composite film after the reaction in the step (3), washing and drying to obtain a target double-layer film actuator;
the alkaline oxide in the step (1) is one or more of magnesium oxide, calcium oxide, strontium oxide, barium oxide, aluminum oxide, zinc oxide and copper oxide;
the polymer film substrate in the step (2) is one of polyethylene, polypropylene, polystyrene, polytetrafluoroethylene, polyvinylidene fluoride and polyimide;
the transition metal salt in the step (3) is one or more of halide salt, nitrate, acetate, sulfate and phosphate of transition metal, and the transition metal ion is Cu 2+ 、Ni 2+ 、Co 2+ 、Fe 2+ 、Mn 2+ 、Zn 2+ 、Fe 3+ 、Al 3+ One or more of the following; in step (2) the suspension is separated into high fractionsThe coating amount of the surface of the sub-film substrate is 0.1-10mg/cm 2 The concentration of metal ions in the transition metal salt solution in the step (3) is 0.01-1.0M, and the reaction time is 0.1-12 hours;
the solvent in the step (1) is absolute ethyl alcohol, the concentration is 0.1-20mg/mL, and the ultrasonic dispersion time is 10-120 minutes.
2. The method of claim 1, wherein the loading in step (2) is vacuum filtration, spray coating or knife coating.
3. The method of claim 1, wherein the polymer film in the step (2) has a thickness of less than 100 μm.
4. The method of claim 1, wherein the basic oxide is magnesium oxide and the transition metal ion is Ni 2+ And Fe (Fe) 2+ ，Ni 2+ /Fe 2+ The molar ratio is 8:2.
5. a bilayer thin film actuator prepared according to any one of claims 1-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011400178.7A CN112520685B (en) | 2020-12-04 | 2020-12-04 | Double-layer film actuator and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011400178.7A CN112520685B (en) | 2020-12-04 | 2020-12-04 | Double-layer film actuator and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112520685A CN112520685A (en) | 2021-03-19 |
| CN112520685B true CN112520685B (en) | 2024-03-01 |
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