JP2008101086A - Polymer material for actuator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a material for an actuator capable of obtaining a large displacement amount even in a small magnetic field strength. <P>SOLUTION: The polymer material for the actuator contains a rubber based polymer forming a main chain, a crosslinking agent for crosslinking the main chain and forming a net-like network with the main chain, and a magnetic body internally contained in a cell of the net-like network, partitioned from the other cell by a partition wall constituted by the main chain and the crosslinking agent and having a pillar-like shape. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a polymer material for an actuator, and more particularly to a polymer material for an actuator that can obtain a large displacement even in a magnetic field having a small magnetic field strength.

  In the field of automobiles, there is an increasing need for materials that enable actuator operations that are small, lightweight, and flexible, and devices such as cushions and seats using the materials. Examples of conventional techniques include the following.

  In Patent Document 1, it is composed of a liquid crystalline molecule whose volume changes due to a change in the orientation state of the molecules in the same phase, a phase transition, and the like, and a deformable cell for encapsulating the liquid crystalline molecule. , And a liquid crystal actuator that operates by changing the alignment state of liquid crystalline molecules for one action selected from the group consisting of light.

Patent Document 2 discloses an electrochemical actuator that uses an ionic liquid as an electrolyte, includes a conjugated polymer as an active electrode, and has a long life and high stability.
JP 2003-88148 A JP-T-2004-527902

  However, since the conventional technology as described above requires a large magnetic field strength to perform the actuator operation, a large-sized magnetic field generation device is also required. Therefore, for example, there was a problem that it was difficult to apply to automobile use.

  Therefore, an object of the present invention is to provide an actuator material that can obtain a large displacement even with a small magnetic field strength.

  As a result of accumulating diligent research in view of the above problems, the present inventors have found that a magnetic material having a columnar shape crosslinks the main chain with the rubber-based polymer that forms the main chain, together with the main chain. A cross-linking agent that forms a network-like network, and a columnar shape that is enclosed in the cells of the network-like network and is separated from other cells by a partition formed by the main chain and the cross-linking agent The present inventors have found that a large amount of displacement can be obtained even with a small magnetic field strength by using a polymer material containing a magnetic material having a magnetic material for the actuator, and the present invention has been completed.

  That is, the present invention includes a rubber-based polymer that forms a main chain, a cross-linking agent that cross-links the main chain and forms a network network with the main chain, and a cell in the network network. And a magnetic material having a columnar shape separated from other cells by a partition constituted by the main chain and the cross-linking agent.

  ADVANTAGE OF THE INVENTION According to this invention, the polymeric material for actuators which can obtain a big displacement amount with a small magnetic field strength can be provided.

  Embodiments of the present invention will be described below.

(First embodiment)
The present invention includes a rubber polymer forming a main chain, a cross-linking agent that cross-links the main chain and forms a network network with the main chain, and a cell of the network network. And a magnetic material having a columnar shape separated from other cells by a partition wall formed of the main chain and the cross-linking agent.

  First, the actuator polymer material of the present invention will be described with reference to the drawings. In the present invention, the drawings are exaggerated for convenience of explanation, and the technical scope of the present invention is not limited to the forms shown in the drawings. Accordingly, embodiments other than the drawings may be employed.

  FIG. 1 is a cross-sectional view showing one embodiment of the polymer material for actuator of the present invention. The actuator polymer material 100 in the form shown in FIG. 1 has a network structure in which a rubber polymer 101 is crosslinked by a crosslinking agent 102. When the rubber polymer 101 is crosslinked, a cellular space is formed in which the rubber polymer 101 and the crosslinking agent 102 function as a partition. By forming the cell-like space, the magnetic body 103 easily enters the space, and aggregation of the magnetic bodies hardly occurs. When the magnetic field H is applied, the magnetic bodies 103 try to align in a direction close to parallel to the magnetic field direction. Thereby, the rubber-based polymer 101 extends in the magnetic field direction, and the entire polymer material for actuator 100 also extends. As a result, the actuator polymer material 100 can push up the cushion provided on the upper portion thereof.

  The strength of the magnetic field applied to drive the polymer material for actuator of the present invention is preferably 0.0001 to 1 T (Tesla), more preferably 0.01 to 0.1 T. If it is the said range, a polymeric material can be expanded-contracted in a magnetic field direction by applying a magnetic field, and a polymeric material can generate a big stress, and is preferable.

[Rubber polymer]
There is no restriction | limiting in particular as the rubber-type polymer 101 used for this invention, A conventionally well-known thing can be used. Specific examples include isoprene rubber, butadiene rubber, styrene / butadiene rubber, butyl rubber, ethylene / propylene rubber, ethylene / vinyl acetate copolymer, chloroprene rubber, chlorosulfonated polyethylene, chlorinated polyethylene, epichlorohydrin rubber, nitrile. Examples thereof include rubber, nitrile / isoprene rubber, acrylic rubber, urethane rubber, silicone rubber, and fluorine rubber. Among these, from the viewpoint of elasticity, silicone rubber and fluorine rubber are preferable, and silicone rubber is more preferable. In particular, from the viewpoint of heat resistance, a silicone rubber having a structure represented by the following chemical formula (1) or (2) is preferable.

  In the chemical formula (1), R1 and R2 are each independently a methyl group or an ethyl group.

  In the chemical formula (2), R1 and R2 are each independently a methyl group or an ethyl group.

  Among the polymers represented by the chemical formulas (1) and (2), preferred polymers are polymers in which R1 and R2 in the chemical formula (1) are methyl groups, and R1 in the chemical formula (2). R2 is a polymer having a methyl group.

  The weight average molecular weight of the rubber polymer is preferably 2000 to 500000, more preferably 3000 to 100000, and most preferably 4000 to 20000 from the viewpoint of rubber elasticity.

  In the present invention, the weight average molecular weight is a value measured by gel permeation chromatography (GPC) or a light scattering method.

[Crosslinking agent]
The cross-linking agent 102 used in the present invention is preferably at least two materials having different molecular weights. Here, the “at least two materials having different molecular weights” may be the same type of materials having different molecular weights or different types of materials having different molecular weights.

  By using at least two cross-linking agents having different molecular weights, a cellular space is formed in which the rubber-based polymer and the cross-linking agent serve as partition walls, and the magnetic material can easily enter the space. As a result, the magnetic bodies are less likely to aggregate with each other, and the magnetic bodies are more easily aligned when a magnetic field is applied.

  Here, for two crosslinking agents having different molecular weights, the ratio of the molecular weights of the crosslinking agent having a high molecular weight and the crosslinking agent having a low molecular weight is preferably 1: 1 to 1: 4, more preferably 1: 1 to 1. : 2. If it is the said range, since the position in the cell of a magnetic body can be fixed, it is preferable.

  In addition, regarding the two crosslinking agents having different molecular weights, the content ratio of the crosslinking agent having a high molecular weight and the crosslinking agent having a low molecular weight is preferably 1: 1 to 1: 4 (mass ratio), more preferably 1. : 1-1: 2 (mass ratio). If it is the said range, since the position in the cell of a magnetic body can be fixed, it is preferable.

  Examples of the compound used as the crosslinking agent include organic siloxane compounds such as polydimethylsiloxane, methylhydrogensiloxane, and methylhydrogensiloxane-dimethylsiloxane copolymer blocked at both ends with vinyl groups.

  Among these crosslinking agents, from the viewpoint of cost, polydimethylsiloxane and methylhydrogensiloxane having both ends blocked with vinyl groups are preferable, and polydimethylsiloxane having both ends blocked with vinyl groups are more preferable.

[Magnetic]
The magnetic body 103 used in the polymer material for actuator 100 of the present invention is not particularly limited as long as it has magnetism and has a columnar shape. If it is columnar, the magnetic bodies can be easily aligned in a direction nearly parallel to the direction of the magnetic field, and can function as an actuator.

  The form of the magnetic material is not particularly limited as long as the shape is a columnar shape, and preferred examples include a form in which metal atoms are dispersed in carbon nanotubes, and a form in which magnetic fine particles are coated with silicon oxide, titanium oxide, or the like. . Among these, a magnetic material in which metal atoms are dispersed in carbon nanotubes is more preferable because it can be mass-produced at low cost.

  The length of the magnetic material is preferably 0.5 to 5.0 nm, more preferably 1.0 to 3.0 nm. If the length of the magnetic material is within the above range, it is preferable that the magnetic material can be encapsulated in a network cell formed by the rubber-like polymer and the crosslinking agent.

  In the present invention, the length of the magnetic material is a value measured by a laser diffraction / scattering particle size distribution measuring apparatus or a transmission electron microscope.

  The magnetic material preferably has an aspect ratio of 1.2 to 5, more preferably 2 to 3. If the aspect ratio is in the above range, the stress generated by applying a magnetic field in the polymer material for actuator of the present invention can be increased, which is preferable.

  In the present invention, the value measured by a transmission electron microscope is adopted as the aspect ratio of the magnetic material.

  In addition, the outer surface of the magnetic body may have a modification layer made of a nonmagnetic and nonconductive inorganic material, an organic material, or a mixture thereof.

  By providing the modification layer, it is possible to prevent a decrease in the magnetic moment of the magnetic material caused by electron transfer between the magnetic materials and magnetic reversal of the magnetic field.

  Furthermore, when a binder capable of binding to the rubber polymer and the magnetic material is added, the magnetic material can easily enter a cellular space formed by the rubber polymer and the crosslinking agent. Therefore, it is preferable.

  Examples of the binder include γ- (2-aminoethyl) aminopropyltrimethoxysilane, γ- (2-aminoethyl) aminopropylmethyldimethoxysilane, and octadecylmethyl [3- (trimethoxysilyl) propyl] ammonium chloride. Silane coupling agents are preferred. Since the silane coupling agent has a structure including an organic group having affinity or reactivity with an organic material and an inorganic group having affinity or reactivity with an inorganic material in the molecule, the silane coupling agent is an organic material. The rubber-like polymer and the magnetic material, which is an inorganic material, can be bonded in a cross-linking manner.

  As described above, the content of the rubber-based polymer, the crosslinking agent, and the magnetic material is such that the total mass of the rubber-based polymer, the crosslinking agent, and the magnetic material is 100% by mass, and the content of the magnetic material is 10 to 30% by mass. %, The content of the rubber polymer is preferably 50 to 70% by mass, and the content of the crosslinking agent is preferably 10 to 30% by mass, the content of the magnetic material is 20 to 30% by mass, and the content of the rubber polymer is More preferably, the content is 50 to 60% by mass and the content of the crosslinking agent is 20 to 30% by mass.

  Next, the manufacturing method of the polymeric material for actuators of this invention is demonstrated.

  In addition, the following aspects show the preferable aspect of this invention, and the manufacturing method of the polymeric material for actuators of this invention is not limited to the following method.

[Magnetic production process]
In this step, a magnetic material is produced. A preferred form of the magnetic material is a metal-dispersed carbon nanotube in which a metal is dispersed in a carbon nanotube. Hereinafter, the metal-dispersed carbon nanotube will be described as an example to describe a preferable form of the magnetic material manufacturing process, but the present process is not limited to this.

  The carbon nanotube is not particularly limited, and a conventionally known carbon nanotube can be used. Specific examples thereof include a single wall carbon nanotube (SWCNT), a double wall carbon nanotube (DWCNT), and a multi-wall carbon nanotube (MWCNT). Is preferred. Among these, single-walled carbon nanotubes are more preferable from the viewpoint of easy manufacture of the magnetic material used in the present invention.

  The carbon nanotubes, for example, anodize a metal such as aluminum to form nano-sized pores on the aluminum surface, and then use a hydrocarbon gas such as propylene gas to perform chemical vapor deposition ( It can be produced by growing carbon on the outer surface and in the hole by the CVD method.

  The metal is selected from the group consisting of scandium, yttrium, lanthanum, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, iron, manganese, cobalt, and nickel. At least one kind is preferable, and iron, cobalt, or nickel is more preferable from the viewpoint of durability of the polymer material and magnetic field response.

  As a method for dispersing the metal in the carbon nanotube, a conventionally known method such as a plating method, a chemical vapor deposition (CVD) method, or a sputtering method can be used. Among them, the plating method is preferable from the viewpoint of productivity.

  The dispersion amount of the metal with respect to the carbon nanotube is preferably 10 to 60% by mass and more preferably 30 to 50% by mass with respect to the total mass of the carbon nanotube from the viewpoint of magnetic field response.

[Mixed liquid preparation process]
In this step, a mixed solution for producing the actuator polymer material is prepared. Examples of the method for preparing the mixed solution include a method of adding a magnetic material, a rubber polymer, and a crosslinking agent to an organic solvent and mixing them to obtain a mixed solution.

  The organic solvent is not particularly limited, and for example, toluene, xylene, methanol, ethanol and the like can be preferably used. Of these, toluene and xylene are more preferable from the viewpoint of solubility.

[Manufacture of polymer materials for actuators]
In this step, a polymer material for the actuator is manufactured. As a method for forming the polymer material, for example, a method in which the mixed solution obtained in the mixed solution preparing step is irradiated with radiation such as γ-rays, X-rays, electron beams, and ultraviolet rays to perform a crosslinking reaction is preferable. Can be mentioned.

  The irradiation amount of the radiation is preferably 100 to 10000 Gy / min, more preferably 200 to 1000 Gy / min, from the viewpoint of the crosslinking rate of the crosslinking agent. Here, Gy (gray) is a unit of radiation dose that gives energy of 1 J (joule) to 1 kg of a substance.

  The temperature of the liquid mixture at the time of irradiation with radiation is preferably 0 to 60 ° C, more preferably 20 to 40 ° C.

  Moreover, the irradiation time of a radiation becomes like this. Preferably it is 60 to 1000 minutes, More preferably, it is 300 to 500 minutes.

  In addition, a method of adding a metal catalyst to the mixed solution to carry out a crosslinking reaction instead of irradiating with radiation is preferably mentioned as a method for producing the polymer material for actuator of the present invention.

  Specific examples of the metal catalyst include bis (cyclooctadiene) platinum, dimethyl (cyclooctadiene) platinum, bis (benzylideneacetone) platinum, tris (dibenzylideneacetone) diplatinum, and tris (ethylene) platinum. Preferred examples include a platinum complex catalyst and a nickel complex catalyst having an allyl compound as a π ligand. Among them, bis (cyclooctadiene) platinum and dimethyl (cyclooctadiene) platinum are more preferable from the viewpoint of reaction rate and reaction yield. preferable.

  The temperature of the mixed solution when performing the crosslinking reaction using the metal complex is preferably 40 to 90 ° C, more preferably 50 to 70 ° C, preferably 50 to 200 hours, more preferably 100 to 150 hours. Intercrosslinking reaction.

(Second Embodiment)
A second aspect of the present invention is a polymer actuator including the actuator polymer material.

  The polymer actuator of the present invention includes at least one structure selected from the group consisting of a fibrous structure, a layered structure, and a foamed structure containing a polymer material for an actuator, and generates a magnetic field in the vicinity of the structure. A device is provided.

  The structure can be manufactured as follows, for example.

  The fibrous structure is obtained by melting the polymer material for actuators of the present invention, spinning and drawing into a fibrous shape, and knitting them.

  The layered structure is obtained by melting the polymer material for actuator of the present invention, extruding it using a mold, and stretching it.

  The foam structure is obtained by producing the polymer material for an actuator of the present invention in a volatile liquid, and then vaporizing and foaming the volatile liquid.

  FIG. 2 is a schematic view of a cushion 200 including the polymer material for actuator of the present invention and a magnetic coil. A part of the polymer material for actuator 201 of the present invention is inserted into a magnetic coil 202 made of a metal material or a conductive polymer material, and laid on the fixed layer 203 like a grid. On top of this, a contact portion 204 that contacts a human body made of a polymer is installed.

  With this configuration, when a current is applied to each magnetic coil, a magnetic field 205 is generated, and the magnetic bodies are aligned in the magnetic field direction. Since the magnetic material has magnetic anisotropy, torque is generated in the magnetic material, and the polymer material 201 expands in the magnetic field direction and contracts in the direction perpendicular to the magnetic field direction, causing the contact portion 204 to move up and down. be able to.

(Third embodiment)
A third aspect of the present invention is a seat system including the polymer actuator.

  The polymer for actuator of the present invention is preferably provided inside the cushion of the seat cushion.

  FIG. 3 is a schematic view showing an embodiment of a seat system provided with the polymer actuator of the present invention.

  As shown in FIG. 3, the seat system 300 includes a cushion 200 and a control device 301 that controls the cushion. Based on the state of the driver seated on the seat and information on the external driving environment, the control device 301 can issue a command to control the cushion 200. The control device 301 can also include a microcomputer that operates according to a program.

  The effects of the present invention will be described using the following examples and comparative examples. However, the technical scope of the present invention is not limited only to the following examples.

(Example 1)
<Production of magnetic material>
Aluminum was subjected to anodizing treatment (conditions: 20 mass% sulfuric acid solution, 40 ° C., voltage 5 V) for 9 minutes to form nano-sized pores on the aluminum surface.

  Next, carbon was grown on the outer surface of the hole and in the hole by a CVD method using propylene gas to produce a carbon nanotube.

  The carbon nanotubes produced above were immersed in 1000 ml of a plating solution containing 220 g / l of cobalt sulfate, 30 g / l of boric acid, and 6 g / l of saccharin sodium as an additive. At this time, vacuum defoaming treatment was performed to sufficiently infiltrate the plating solution into the carbon nanotube tube. And the plating process was performed by the electrodeposition method, and the plating layer was formed in the said carbon nanotube.

  Further, the pores were heat-treated with a 10M (mol / l) NaOH aqueous solution heated to 150 ° C. to dissolve and remove the aluminum layer, thereby obtaining Co-dispersed single-walled carbon nanotubes (SWCNT) as magnetic materials. It was. As a result of measuring the obtained Co-dispersed SWCNT with a transmission electron microscope, the obtained Co-dispersed SWCNT had a length of 3 nm, a diameter of 1 nm, and an aspect ratio of 3.

<Preparation of polymer material for actuator>
60 g of methyl hydrogen silicone having an average degree of polymerization of 60 which is a rubber polymer, 20 g of Co-dispersed SWCNT obtained above, 110 g of the crosslinking agent represented by the following chemical formula (3), and the following chemical formula (4) Then, 10 g of the crosslinking agent 2 was put into a beaker containing 1000 ml of 80 ° C. toluene, and sufficiently stirred. The resulting solution was cross-linked by reacting at 60 ° C. for 100 hours in the presence of 0.18 mmol / l bis (cyclooctadiene) platinum. Thereafter, the cross-linked material was taken out of the solvent, thoroughly rinsed with water, pushed into a cylindrical hollow mold made of aluminum, solidified sufficiently, dried for one day, and then taken out.

  As a result, a cylindrical polymer material for actuator having a length of 10 cm including Co-dispersed SWCNTs was obtained.

(Example 2)
The anodizing time for aluminum was 15 minutes, and the length was 3 nm, the diameter was 1 nm, the aspect ratio was 3 instead of the Co-dispersed SWCNTs with a length of 5 nm, the diameter was 1 nm, and the aspect ratio was 5 A polymer material for an actuator was produced in the same manner as in Example 1 except that dispersed SWCNT was used.

(Example 3)
Except for 20 g of Co-dispersed SWCNT, 15 g of the cross-linking agent 1 represented by the chemical formula (3), and 5 g of the cross-linking agent 2 represented by the chemical formula (4), the same method as Example 1 was used. A polymer material was prepared.

Example 4
Instead of using bis (cyclooctadiene) platinum, a polymer material for an actuator was obtained in the same manner as in Example 1 except that γ rays were irradiated for 400 minutes at a dose of 200 Gy / min.

(Example 5)
A polymer material for an actuator was obtained in the same manner as in Example 1 except that 20 g of the crosslinking agent 1 represented by the chemical formula (3) was used as the binder.

(Comparative example)
A polymer material for an actuator was obtained in the same manner as in Example 1 except that no crosslinking agent was used.

(Performance evaluation)
The performance evaluation regarding the responsiveness to the displacement, generated stress, and magnetic field of the polymer materials for actuators obtained in Examples 1 to 5 and the comparative example was performed.

[Measurement of displacement]
A polymer material for the actuator was fixed to the pedestal, a magnetic coil was wound around the polymer material, and a current of 5 A was passed through the magnetic coil, thereby applying a 0.02 T magnetic field to the polymer material. As a result, expansion and contraction of the tip of the polymer material opposite to the fixed side occurs. The displacement due to this was measured by scanning with a laser.

[Measurement of generated stress]
A polymer material for an actuator was sandwiched between a pressure measurement unit that was fixed and contained a pressure sensor, and a pedestal, and a magnetic field was applied to the polymer material using a magnetic coil in the same manner as in the above displacement measurement. At this time, the pressure generated by the pressure sensor of the pressure measuring unit was measured, and the pressure was used as the generated stress.

[Measurement of magnetic field response]
With the same apparatus as the above-described displacement measurement, a periodic pulse magnetic field is generated by flowing a periodic pulse current having a duty ratio of 50% as shown in FIG. Measured the displacement of the tip of the polymer material for the actuator on the opposite side with a laser, and measured the response. Here, the maximum frequency of the periodic pulse magnetic field in which each polymer material can expand and contract following the applied periodic pulse magnetic field was measured.

  The performance evaluation results are shown in Table 1.

  If the generated stress is 10 kPa or more, when applied to a seat or cushion, which will be described later, it is possible to drive a sitting driver, and if the displacement is several mm, various displacement control of the seat or cushion is possible. Moreover, if the response speed is 5 Hz or more, the response (followability) of the seat and the cushion in real time can be ensured for various controls.

  As can be seen from Table 1, it was found that the polymeric materials for actuators of Examples 1 to 4 of the present invention were superior in displacement, generated stress, and responsiveness compared to the polymeric material of the comparative example.

(Example 6)
After 3 g of γ-glycidoxypropyltrimethoxysilane as a silane coupling agent and 20 g of Co-dispersed SWCNTs are stirred in toluene at 80 ° C. for 60 minutes, methyl hydrogen having an average polymerization degree of 60 as a rubber polymer Actuator in the same manner as in Example 1 except that 60 g of silicone, 10 g of the crosslinking agent 1 represented by the chemical formula (3), and 10 g of the crosslinking agent 2 represented by the chemical formula (4) were further added and mixed. A polymer material was prepared.

  Using the obtained polymer material for actuator, generated displacement, generated stress and responsiveness generated in the initial actuator polymer material, and displacement generated in the polymer material after 10 hours of continuous magnetic field application Stress and responsiveness were examined.

  The initial generated displacement, generated stress, and responsiveness are 4 mm, 40 kPa, and 30 Hz, respectively, and the generated displacement, generated stress, and responsiveness after 10 hours are 3.5 mm, 35 kPa, and 25 Hz, respectively. There was almost no drop in the.

(Example 7)
The actuator polymer material produced in Example 1 was cut into a cylindrical shape, inserted into a magnetic coil made of copper wire, and arranged in an array on a fixed plate. A cushion (see FIG. 2) having a structure in which a thin foamed urethane was placed thereon was prepared.

  When a periodic pulse current of 10 Hz as shown in FIG. 4 was passed through the magnetic coil, the cushion moved up and down.

(Example 8)
A seat having a built-in control device composed of the cushion produced in Example 7 and a 16-bit microcomputer was produced as shown in FIG.

  A driver sat down on this seat and performed a seat control experiment during driving.

  When the cushion was moved up and down by the control from the microcomputer based on the information on the driver's condition and driving condition, the cushion moved up and down.

It is the schematic which shows one Embodiment of the polymeric material for actuators of this invention. It is the schematic which shows the cushion provided with the polymer actuator of this invention. FIG. 3 is a schematic view showing an embodiment of the seat system of the present invention including the cushion of FIG. 2. It is a graph which shows the periodic pulse current of 50% of duty ratio used for the measurement of the responsiveness to a magnetic field.

Explanation of symbols

100, 201 Actuator polymer material,
101 rubber polymer,
102 cross-linking agent,
103 magnetic material,
200 cushions,
202 magnetic coil,
203 fixed layer,
204 contact portion,
205 magnetic field,
300 sheets,
301 Control device.

Claims (10)

A rubber polymer forming a main chain;
A crosslinking agent that crosslinks the main chain and forms a network with the main chain;
A magnetic material having a columnar shape, which is encapsulated in cells of the mesh network, and is separated from other cells by a partition formed by the main chain and the crosslinking agent;
A polymer material for an actuator, comprising:   The magnetic material is selected from the group consisting of scandium, yttrium, lanthanum, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, iron, manganese, cobalt, and nickel. The polymer material for an actuator according to claim 1, comprising at least one kind of metal.   The polymer material for an actuator according to claim 1 or 2, wherein the rubber-based polymer has at least one of a hydrocarbon group or an organic silyl group.   The polymer material for an actuator according to any one of claims 1 to 3, wherein the crosslinking agent contains at least two kinds of compounds having different molecular weights.   The polymer material for an actuator according to any one of claims 1 to 4, wherein the magnetic substance is bound to the rubber polymer with a binder.   The polymer material for an actuator according to claim 5, wherein the binder is a silane coupling agent. A rubber polymer;
A crosslinking agent;
Magnetic material,
A solvent,
A step of preparing a mixed solution, irradiating the mixed solution with radiation,
The manufacturing method of the polymeric material for actuators characterized by including these. A rubber polymer;
A crosslinking agent;
Magnetic material,
A solvent,
Preparing a mixed solution by mixing
Adding a metal catalyst to the mixed solution to perform a crosslinking reaction;
The manufacturing method of the polymeric material for actuators characterized by including these. At least one structure selected from the group consisting of a fibrous structure, a layered structure, and a foamed structure including the polymer material for an actuator according to any one of claims 1 to 6;
A magnetic field generator;
A polymer actuator comprising:   A sheet system comprising the polymer actuator according to claim 9.

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