JP2009232677A - Elastomer transducer, dielectric rubber composition, and power generating element - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new elastomer transducer, which can exhibit excellent durability and transducer performance, a dielectric rubber composition, and a power generating element. <P>SOLUTION: The elastomer transducer 100 has an intermediate layer 20 interposed between a pair of electrode layers 10 and 10, and the electrode layers 10 and 10 are constituted of conductive rubber composition which contains conductive fillers in base rubber, and also the intermediate layer 20 is constituted of dielectric rubber composition which contains dielectric fillers in base rubber. Hereby, it can have excellent deformability, and it can exhibit excellent durability to repetitive stress such as strain, etc. and also it can exhibit excellent transducer performance. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a transducer for converting electrical energy and mechanical energy into each other, and in particular, an elastomer transducer using a dielectric rubber composition, a dielectric rubber composition constituting the transducer, and a It relates to the power generation element used.

Transducers for converting electrical energy and mechanical energy into various fields such as power supplies (generators) for mobile devices, engines, artificial muscles, actuators for pumps, speakers, etc. Application of is being studied.
In addition, application of dielectric rubber compositions constituting transducers to antennas and capacitors has been studied.

  Such a transducer (transducer) is composed of a dielectric elastomer laminate having a structure in which a polymer (dielectric rubber) is an intermediate layer and both ends thereof are sandwiched between a pair of electrode layers. For example, the following Patent Document 1 discloses a dielectric elastomer laminate having a structure in which materials serving as electrodes are arranged on both sides of a dielectric elastomer based on silicon or acrylic rubber that functions as a transducer. . Moreover, as a material of this dielectric elastomer, the following Patent Document 2 discloses a ceramic material having a high dielectric constant dispersed in a base elastomer, and the following Patent Document 3 discloses Discloses an elastomer that exhibits high non-dielectricity by adding an active ingredient that increases the dipole moment to the base elastomer.

Special table 2003-505865 gazette JP 2007-063337 A JP 2002-285013 A

By the way, the conventional dielectric elastomers disclosed in these Patent Documents 1 to 3 have the following problems.
1. It is assumed that the active component that increases the amount of dipole moment is added to achieve a high dielectric constant, so that the inherent flexibility of the elastomer is impaired and the performance as a transducer is not fully demonstrated. Is done.
2. In addition, since a large amount of dielectric ceramics is added, not only the flexibility is impaired, but cracks and breaks may occur when the expansion and contraction are repeated.

3. In addition, there is a description that an additive may be included in order to improve the dielectric constant of the material, but specific numerical values such as what relative dielectric constant and elastic modulus are suitable as a transducer Is not shown.
Therefore, the present invention has been devised to solve the above-mentioned problems, and the object thereof is a novel elastomer transducer and dielectric that can exhibit excellent durability, transducer performance, and power generation performance. A rubber composition and a power generation element using the same are provided.

In order to solve the above problems, the first invention
An elastomer transducer having an intermediate layer interposed between a pair of electrode layers, wherein the electrode layer is made of a conductive rubber composition containing a conductive filler in a base rubber, and the intermediate layer is a base rubber An elastomer transducer comprising a dielectric rubber composition containing a dielectric filler.
In addition, the second invention,
In the first invention, the dielectric filler of the dielectric rubber composition is an organic compound having a thiocarbonyl group.

In addition, the third invention,
In the first or second invention, the dielectric rubber composition is at least one of an acrylic resin, a silicon resin, a chlorobrene resin, and a fluorosilicone resin.
In addition, the fourth invention is
In the second or third aspect of the invention, the organic compound having a thiocarbonyl group is at least one of a thiourea derivative, a thioamide derivative, a thioketone derivative, and a dithiocarbamic acid ester derivative.

In addition, the fifth invention,
In any one of the first to fourth inventions, the elastomeric transducer is characterized in that the base rubber of the conductive rubber composition and the base rubber of the dielectric rubber composition are the same resin.
In addition, the sixth invention,
In any one of the first to fifth inventions, the thickness of the intermediate layer is 10 μm or more and 500 μm or less, and the thickness of each electrode layer is 0.05 μm or more and 100 μm or less. I ’m a Deucer.

On the other hand, the seventh invention
A dielectric rubber composition containing a dielectric filler in a base rubber, wherein an organic compound having a thiocarbonyl group is used as the dielectric filler.
Further, the eighth invention is
The power generation element is formed by attaching the elastomer transducer on a core material and connecting a conductive wire to each electrode layer of the elastomer transducer.
In addition, the ninth invention,
A plurality of the elastomer transducers are mounted on a core member, and the elastomer transducers are electrically connected in series or in parallel with a conductive wire.

The tenth aspect of the invention is
In any of the eighth and ninth power generation elements, the core member has a sheet shape, a columnar shape, or a cylindrical shape.
The eleventh invention
The power generation element according to any one of the eighth to tenth power generation elements, wherein the core material is made of PTFE (polytetrafluoroethylene).

In the elastomer transducer according to the present invention, since it is not necessary to add a large amount of an active ingredient that increases the amount of dipole moment, it has excellent deformability and excellent durability against repeated stress such as strain. Can demonstrate.
In addition, since an organic compound having a thiocarbonyl group is used as the dielectric filler of the dielectric rubber composition constituting the intermediate layer, excellent transducer performance can be exhibited.
And, according to the power generation element using this elastomer transducer, it is small and light and can exhibit excellent deformability and power generation capability.

It is a block diagram which shows one Embodiment of the elastomer transducer 100 which concerns on this invention. It is explanatory drawing which shows an example of an actuation confirmation test. It is explanatory drawing which shows an example of an electric power generation amount confirmation test. It is a graph which shows the change of the dielectric constant with respect to the addition rate of Noxeller TMU and Noxeller EUR which are organic compounds which have a thiocarbonyl group. It is a block diagram which shows one Embodiment of the electric power generation element 200 using the elastomer transducer 100 of this invention as a power generation source. 1 is a plan view showing an embodiment of a power generating element 200 in which a plurality of elastomer transducers 100 of the present invention are arranged on a sheet-like core material 60. FIG. It is a side view of the electric power generation element 200 shown in FIG. (A) is a perspective view of the electric power generating element 200 which provided the elastomer transducer 100 of this invention on the cylindrical core material 60, (b) is the top view. (A) is a perspective view of the electric power generating element 200 which provided the elastomer transducer 100 of this invention on the cylindrical core material 60, (b) is the top view. (A) is a perspective view of a power generating element 200 in which a plurality of elastomer transducers 100 of the present invention are provided in the axial direction on a cylindrical core member 60, and (b) is a plan view thereof. (A) is a perspective view of a power generation element 200 in which a plurality of elastomer transducers 100 of the present invention are provided in a circumferential direction on a cylindrical core member 60, and (b) is a plan view thereof.

Next, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 shows an embodiment of an elastomer transducer 100 according to the present invention.
As shown in the figure, this elastomer transducer 100 is configured by interposing (stacking) a dielectric intermediate layer 20 between a pair of electrode layers 10 and 10.
The electrode layers 10 and 10 are made of a conductive rubber composition containing a conductive filler in a base rubber, and the intermediate layer 20 is a dielectric rubber composition containing a dielectric filler in a base rubber. It consists of

First, the electrode layers 10 and 10 have a volume resistivity of 1 × 10 Ω · m or less, more preferably 1 × 10 ⁻³ Ω · m or less. When the volume resistivity exceeds 1 × 10 Ω · m, it is assumed that the responsiveness is deteriorated due to low conductivity, which is not preferable. Specifically, Ketjen black or acetylene black, which is one type of conductive carbon black, or carbon materials such as graphite, carbon fiber, carbon nanofiber (CNF), and carbon nanotube (CNT), or gold, silver, What contains metal materials, such as platinum, as an electroconductive filler is desirable.

  Further, as the base rubber of the conductive rubber composition constituting the electrode layers 10, 10, it is preferable to use the same base rubber as the dielectric rubber composition constituting the intermediate layer 20, for example, silicon-based, Modified silicon, acrylic, polychloroprene, polysulfide, polyurethane, polyisobutyl, and the like can be used. In particular, those using acrylic, silicon, and polychloroprene are highly flexible and excellent in deformability.

  The electrode layers 10 and 10 have a thickness in the range of about 0.05 μm to 100 μm, preferably in the range of 1 to 50 μm. If it is less than 0.05 μm, the film thickness is thin and it is difficult to make the film thickness uniform, and breakage such as holes and cracks occurs during deformation. On the other hand, if the thickness exceeds 100 μm, the film thickness is too thick, resulting in poor responsiveness and difficulty in following the deformation. Moreover, as a physical property of these electrode layers 10 and 10, hardness (dilometer A scale) is 20-60, More preferably, it is the range of 30-50. When the hardness is less than 20, the deformability is increased, but the tendency for the mechanical strength to be insufficient is increased and the practicality is lowered, which is not preferable. On the other hand, when the hardness exceeds 60, the mechanical strength is high, but since the absolute deformability is insufficient, the practicality is low.

  On the other hand, as the base rubber of the dielectric rubber composition constituting the intermediate layer 20, for example, as shown in Table 1 below, acrylic rubber, chloroprene rubber, silicon rubber, isopropylene rubber, styrene butadiene rubber, butyl rubber, ethylene propylene Rubber, nitrile rubber, fluorosilicone rubber, fluororubber, etc. are preferred, and among them, particularly preferred are “the base rubber alone exhibits a high relative dielectric constant”, “compatibility with a dielectric filler described later” ”,“ Inexpensive, easy to obtain, and good formability ”,“ Hardness of molded product (dilometer A scale) in the range of 30-50 ”,“ Maximum elongation exceeds 500% ” Acrylic rubber, silicon rubber, and chloroprene rubber. More preferably, it is the same as the base rubber of the conductive rubber composition constituting the electrode layers 10 and 10.

  As the organic compound having a thiocarbonyl group, a thiourea derivative represented by the following chemical formula 1, a thioamide derivative represented by the chemical formula 2, a thioketone derivative represented by the chemical formula 3, a dithiocarbamic acid ester derivative represented by the chemical formula 4 and the like are suitable. It is. These organic compounds are appropriately selected in consideration of the past temperature, operating temperature, target relative dielectric constant, and compatibility with the base rubber to be used. In particular, thiourea derivatives are used in air and water. It is the most suitable organic compound because it is very stable, has excellent compatibility with the base rubber and exhibits a low melting point.

  The content of the organic compound having a thiocarbonyl group is appropriately selected depending on the target dielectric constant, the type of base rubber, and the like, but is approximately 5 to 40% by weight, more preferably 10 to 30% by weight. . If the content is less than 5% by weight, the absolute amount present in the base rubber is too small, so that the relative dielectric constant does not improve so much and the transducer performance cannot be fully exerted, and more than 40% by weight. This is because the limit of compatibility with the base rubber is exceeded and flexibility is greatly impaired.

Moreover, as the dielectric filler blended in these base rubbers, high dielectric ceramic powders and organic compounds having a thiocarbonyl group are suitable.
Examples of the high dielectric ceramic powder include barium titanate (BaTiO ₃ ), lead zirconate titanate (PZT), lanthanum doped lead zirconate titanate (PLZT), and strontium titanate (SrTiO ₃ ) as shown in Table 2 below. ), Lead titanate (PbTiO ₃ ), bismuth titanate, bismuth barium titanate and the like are suitable. Among these, lead zirconate titanate (PZT) is most preferable because it has a Curie point of 200 ° C. or higher and a high relative dielectric constant. In addition, as long as it has a fixed dielectric constant and a Curie point, compounds other than these may be used.

The content of the high dielectric ceramic powder is appropriately selected depending on the intended relative dielectric constant and the compound itself, but is in the range of 5 to 70% by weight, more preferably 5 to 50% by weight. This is because when the amount exceeds 70% by weight, the relative weight ratio of the base rubber becomes small and the flexibility is greatly impaired, and as a result, the transducer performance cannot be fully exhibited.
Further, the thickness of the intermediate layer 20 is different depending on the base rubber to be used, but is about 10 μm to 500 μm, more preferably 200 to 300 μm, which is a thickness capable of maintaining insulation. If the thickness is less than 10 μm, dielectric breakdown may occur when a voltage is applied, and a possibility that a hole or the like is generated during deformation increases. On the other hand, if the thickness exceeds 500 μm, the film thickness is too thick and a large force is required for deformation, which may reduce the responsiveness.

As other physical properties, the hardness (dilometer A scale) is in the range of 20 to 60, more preferably 30 to 50. When the hardness is less than 20, the deformability is increased, but the tendency of the mechanical strength to become insufficient is increased and the practicality is lowered, which is not preferable. On the other hand, when the hardness exceeds 60, the practical deformability is low because the absolute deformability is insufficient.
And in the elastomer transducer 100 of the present invention having such a configuration, as demonstrated in the following examples, it has excellent deformability and excellent durability against repeated stress such as strain. The ability to demonstrate. In addition, since an organic compound having a thiocarbonyl group is used as the dielectric filler of the dielectric rubber composition constituting the intermediate layer, excellent transducer performance can be exhibited.

Next, FIG. 5 to FIG. 11 show an embodiment of a power generation element 200 using such an elastomer transducer 100 of the present invention as a power generation source.
First, the power generating element 200 of FIG. 5 is obtained by integrally bonding the elastomer transducer 100 of the present invention on an insulating flat core material 60. With such a structure, a flat and small power generation element 200 can be obtained, and can be used as a power source for electronic devices with many space restrictions such as a mobile phone.

  Next, in the power generation element 200 of FIGS. 6 and 7, a plurality of elastomer transducers 100 of the present invention are arranged on a sheet-like core material 60, and each of these elastomer transducers 100 is electrically connected by a conductive wire 70. They are connected in series. With such a configuration, not only can a large amount of electricity added with a voltage corresponding to the number of the elastomer transducers 100 be taken out, but the sheet-like core material 60 itself has appropriate flexibility. Can demonstrate. Therefore, for example, since it can be installed so as to be affixed to the inner surface of the casing of the electronic device, it can be used as a more convenient power source with less restrictions on its installation shape and location.

When the plurality of elastomer transducers 100 are connected in series in this way, the lower electrode is a negative electrode and the upper electrode is a positive electrode. Therefore, as shown in the figure, the conductive wire 70 is connected between adjacent upper and lower electrodes. Will be connected directly. In addition, when a plurality of elastomer transducers 100 according to the present invention are arranged in this way, it goes without saying that each elastomer transducer 100 may be electrically connected in parallel.
The power generating element 200 of FIG. 8 is obtained by integrally bonding the elastomer transducer 100 of the present invention to the surface of a cylindrical core member 60. With such a structure, the elastomer transducer 100 can be efficiently installed in a narrow space without sacrificing the size (area) of the elastomer transducer 100.

Furthermore, if a cylindrical core member 60 as shown in FIG. 9 is used as this modified example, the elastomer transducer 100 of the present invention is integrally bonded not only to the surface (outer surface) but also to the inside thereof. Can do. As a result, it is possible to exhibit even more excellent power generation capacity without changing the overall size.
Further, as shown in FIGS. 10 and 11, a plurality of elastomer transducers 100 are integrally bonded to the cylindrical core member 60 in the circumferential direction or the axial direction, and each of these is similarly provided in FIG. If the elastomer transducers 100 are electrically connected in series or in parallel by a conductive wire (not shown), more excellent power generation capability can be exhibited.
Here, as the core material 60, it is desirable to use a material that satisfies a wide operating temperature range, chemical resistance, electrical insulation, low friction, non-adhesiveness, weather resistance, flame resistance, and the like. It is desirable to use a fluororesin such as polytetrafluoroethylene.

Next, specific examples according to the elastomer transducer 100 of the present invention will be described.
(Examples 1 to 16)
As shown in Tables 3 and 4 below, reactive bulk acrylic rubber (ACM) (Toupe Co., Ltd.) to which 8% by weight of a crosslinking agent (vulcanizing agent: Polynate 70 (soft curing agent) manufactured by Toyo Polymer Co., Ltd.) was added. Toaclon SA-310) (Examples 1 to 10) or a reactivity obtained by adding 0.5% by weight of a crosslinking agent (vulcanizing agent: zinc oxide manufactured by Kanto Chemical Co., Ltd., magnesium oxide manufactured by High-Purity Chemical Co., Ltd.) Chip-shaped chloropropylene rubber (CR) (Showa W manufactured by Showa Denko KK) (Examples 11 to 16) was used as the base rubber, and Noxeller TMU (Ouchi Shinsei Chemical Co., Ltd.) was used as the organic compound having a thiocarbonyl group. Kogyo Co., Ltd. (Trimethylthiourea) (Examples 1-3, 11, 12), or Noxeller EUR (Ouchi Shinsei Chemical Co., Ltd. 1) , 3-diethylthiourea (Examples 4 to 6, 13, 14), or TMTU (Tetramethylthiourea manufactured by Tokyo Chemical Industry Co., Ltd.) (Examples 7 and 8), or TMTM (Tetramethyl manufactured by Tokyo Chemical Industry Co., Ltd.) Thiuram monosulfide) (Examples 9 and 10), or Noxeller C (1,3-diphenylthiourea manufactured by Ouchi Shinsei Chemical Co., Ltd.) (Example 15), or Noxeller M (Ouchi Shinsei Chemical Industry Co., Ltd. 2) -Mercaptobenzothiazole) (Example 16) was added and dispersed at a predetermined ratio to prepare a dielectric rubber composition to be the intermediate layer 20.
Thereafter, each dielectric rubber composition was made into a semi-cured thin film using a K control coater (manufactured by Matsuo Seisakusho), and the thickness, relative dielectric constant, hardness, and elongation at break of each sample were measured. The measurement results are shown in Tables 3 and 4 below.

(Comparative Examples 1-8)
As shown in Table 5 below, the same dielectric rubber composition consisting of the same base rubber as in the examples (Comparative Examples 1 and 6), or the same noxeller as the organic compound having a thiocarbonyl group in the base rubber. TMU (Comparative Examples 2, 3, 7, 8) and Noxeller C (Comparative Example 4) were added and dispersed at a predetermined ratio to produce a dielectric rubber composition to be the intermediate layer 20. In Comparative Example 5, DEU (1,3-diethylurea manufactured by Tokyo Chemical Industry Co., Ltd.) was used as the organic compound.
Thereafter, the film thickness, relative dielectric constant, hardness, and elongation at break of each sample were measured in the same manner as in Examples, and the measurement results are shown in Table 5 below.

As a result, as can be seen from Tables 3 to 5, in Examples 1 to 16 according to the present invention, by dispersing an organic compound having a thiocarbonyl group in the base rubber, Comparative Examples 1 and 6 using the base rubber alone. Compared with, the relative permittivity was greatly improved.
The magnitude of the relative dielectric constant depends on the weight fraction of the organic compound to be added.
FIG. 4 is a graph showing the change in relative permittivity with respect to the addition rate of Noxeller TMU and Noxeller EUR. As shown in the figure, in any case, the relative permittivity increases as the amount of addition increases, and shows a maximum value near 20% by weight. Thereafter, the relative permittivity gradually decreases as the amount of addition increases. Recognize.

In Comparative Examples 3, 4, and 8 in which the organic compound was added to the base rubber by 35 wt%, 35 wt%, and 50 wt%, the relative dielectric constant showed a value of about 8 to 10, but the elongation at break was 200. % Or less, and flexibility was greatly impaired.
In addition, Comparative Example 5 was obtained by adding diethylurea (DEU) having a structure very similar to Noxeller EUR as an organic compound, but the non-dielectric constant showed a value equivalent to EUR, The elongation at break was greatly inferior compared to that with the addition of EUR.

Next, as shown in the following Table 6 (Examples 17 to 21) and Table 7 (Comparative Examples 9 to 13), these Examples 2, 4, 10, 12, 13 and Comparative Examples 1, 2, 3, The intermediate layer (dielectric rubber composition) obtained in 6 and 7 was used, electrode layers were arranged on the upper and lower sides thereof, and a cross-linking treatment was performed by pressure and heat treatment to produce a laminate.
Here, as shown in Tables 6 and 7, the electrode layer was prepared by preparing a conductive rubber composition in which a predetermined amount of CNF was added and dispersed as a conductive filler in the above-described reactive bulk acrylic rubber. The product was made into a semi-cured thin film using a K control coater (manufactured by Matsuo Seisakusho) and used as a sample.
Thereafter, an actuation confirmation test and a power generation amount confirmation test as described in detail below were performed on each of these laminates, and the test results (deformability and power generation capacity) are shown in Tables 6 and 7.

(Actuation confirmation test)
As shown in FIG. 2, flaky copper electrodes 30 and 30 are used as conductive electrodes (room temperature drying type: Dotite D-362 manufactured by Fujikura Kasei) for a part of the upper and lower electrode layers 10 and 10 of each laminate. And bonded to the high voltage generator 40. And the voltage of 1 kV was applied with respect to the laminated body from this high voltage generator 40, and the actuation deformation amount in that case was observed. As the amount of actuation deformation, Comparative Example 9 in Table 7 using only acrylic rubber as the dielectric rubber composition constituting the intermediate layer was compared as “1”.

(Power generation confirmation test)
As shown in FIG. 3, an ammeter 60 was connected to the electrode layer 10 of each laminate through a copper electrode 30, and one end on the side where the copper electrode 30 was installed was fixed by a fixing plate 50. Thereafter, the other end was mechanically extended by 50%, and the current value generated when the other end was restored was measured. In addition, as this electric power generation amount, the electric current value of the comparative example 9 was compared as "1".

As a result, regarding the deformability by the actuation confirmation test, Comparative Examples 9 to 13 had a maximum of about 1.2, whereas Examples 17 to 21 according to the present invention were all of Comparative Example 9. About twice as large deformation was observed.
On the other hand, regarding the power generation capacity by the power generation amount confirmation test, in Examples 17 to 21 using the intermediate layer made of the dielectric rubber composition exhibiting a high relative dielectric constant of 10 or more, the current value is twice or more that of Comparative Example 9. Was observed. Moreover, although the comparative example 11 showed the high electric power generation amount, the actuation deformation amount was very small.

(Examples 22 to 32)
As shown in Table 8 and Table 9 below, reactive bulk acrylic rubber (Examples 22 to 29) to which 8% by weight of the same crosslinking agent as in Examples 1 to 10 was added, and the same crosslinking as in Examples 11 to 16 above. Reactive chip-like chloropropylene rubber (CR) (Examples 30 to 32) to which 0.5% by weight of an additive was added was used as a base rubber, and this base rubber was used as an organic compound having a thiocarbonyl group as Noxeller TMU (Examples). 22-25, 30, 31), or Noxeller EUR (Examples 26, 27, 32), or TMTU (Examples 28, 29), and PTZ (made by Fuji Titanium Industry Co., Ltd.) or BaTiO ₃ (high dielectric ceramic). A dielectric rubber composition to be the intermediate layer 20 was produced by adding and dispersing a product manufactured by Fuji Titanium Industry Co., Ltd. at a predetermined ratio.
Thereafter, each dielectric rubber composition was made into a semi-cured thin film using a K control coater (manufactured by Matsuo Seisakusho), and the thickness, relative dielectric constant, hardness, and elongation at break of each sample were measured. The measurement results are shown in Table 8 and Table 9 below.

(Comparative Examples 14-16)
As shown in the right column of Table 9, the dielectric properties of the base rubber (Comparative Examples 14 and 15) and Noxeller TMU (Comparative Example 16) and PTZ as a high dielectric ceramic are added and dispersed at a predetermined ratio to form the intermediate layer 20. A rubber composition was prepared.
Thereafter, the film thickness, relative dielectric constant, hardness, and elongation at break of each sample were measured in the same manner as in Examples, and the measurement results are shown in Table 9.

As a result, as can be seen from Table 8 and Table 9, in Examples 22 to 32 according to the present invention, the organic compound was added to the base rubber by dispersing the high dielectric ceramic together with the organic compound having a thiocarbonyl group. As compared with Comparative Examples 14 and 15, the relative dielectric constant was greatly improved. Moreover, although the comparative example 16 is what added both, since the addition rate of high dielectric ceramics is too much, although the dielectric constant was high, the flexibility was lost.
Then, as shown in Table 10 below, using the intermediate layers (dielectric rubber compositions) obtained in Examples 22, 24, 25, and 29 and Comparative Examples 14 and 16, the same method as described above was used. Various types of laminates (Examples 33 to 37, Comparative Examples 17 and 18) were prepared, and the same actuation confirmation test and power generation amount confirmation test were performed on each of these laminates. Table 10 shows the power generation capacity.

As a result, as for deformability, Comparative Examples 17 and 18 had a maximum of about 1.2, whereas Examples 33 to 37 according to the present invention all had a large deformation about twice that of Comparative Example 17. Was observed.
In addition, regarding the power generation performance, in Examples 33 to 37 using the intermediate layer made of the dielectric rubber composition exhibiting a high relative dielectric constant of 10 or more, a current value more than twice that of Comparative Example 17 was observed. In Comparative Example 18, the amount of power generation was high, but the amount of actuation deformation was very small.

(Examples 38 to 43)
As shown in Table 11 below, reactive bulk acrylic rubber (Examples 38 to 41) to which the same crosslinking agent as in the above Examples was added, and reactive chip-like chloropropylene rubber (CR) (Examples 42 and 43) were added. Each base rubber was used, and Noxceller C (Example 38), Noxeller EUR (Example 39), and Noxeller TMU (Examples 40 to 43) were added and dispersed in the base rubber as organic compounds having a thiocarbonyl group at a predetermined ratio. An intermediate layer was produced using the dielectric rubber composition. The thickness, relative dielectric constant and hardness of the intermediate layer are as shown in the table.
An electrode layer in which CNF is dispersed in a reactive bulk acrylic rubber is laminated above and below these kinds of intermediate layers (dielectric rubber composition), and six kinds of laminates (Examples) are formed in the same manner as described above. 38-43) were produced. Thereafter, an actuation confirmation test and a power generation amount confirmation test similar to those described above were performed on each of these laminates, and the test results (deformability and power generation capacity) are shown in Table 11.

(Comparative Examples 19-23)
As shown in Table 12 below, reactive bulk acrylic rubber (Comparative Examples 19 and 20) and reactive chip-like chloropropylene rubber (CR) (Comparative Examples 21 to 23) to which the same crosslinking agent as in the above Examples was added were used. A dielectric rubber composition (Comparative Examples 19 and 21) consisting of this base rubber alone, or Noxeller TMU (Comparative Examples 20 and 22) and Noxeller M (Comparative Example 23) are used as the base rubber. An intermediate layer was prepared using the dielectric rubber composition added and dispersed in a proportion. The thickness, relative dielectric constant and hardness of the intermediate layer are as shown in the table.

  In the same manner as in Examples 38 to 43, electrode layers obtained by dispersing CNF in reactive bulk acrylic rubber were laminated above and below these six kinds of intermediate layers (dielectric rubber composition), and the same as described above. Five types of laminates (Comparative Examples 19 to 23) were prepared by the method. Thereafter, an actuation confirmation test and a power generation amount confirmation test similar to those described above were performed on each of these laminates, and the test results (deformability and power generation capacity) are shown in Table 12.

As a result, as can be seen from Tables 11 and 12, the deformability was about 1.2 at maximum in Comparative Examples 19 to 23, whereas Examples 38 to 43 according to the present invention were In both cases, a large deformation about twice that of Comparative Example 19 was observed.
In addition, regarding the power generation performance, in Examples 38 to 43 using the intermediate layer made of the dielectric rubber composition showing a high relative dielectric constant of 10 or more, a current value more than twice that of Comparative Example 19 was observed.

(Examples 44 to 49)
As shown in Table 13 below, the same reactive bulk acrylic rubber (Examples 44 to 47) and reactive chip-like chloropropylene rubber (CR) (Examples 48 and 49) as the above examples were used as base rubbers, respectively. To this base rubber, an organic compound having a thiocarbonyl group is Noxeller TMU (Examples 44 to 46), Noxeller EUR (Example 47), Noxeller TMU (Examples 48 and 49), and PZT or BaTiO3 as a high dielectric ceramic. An intermediate layer was prepared using a dielectric rubber composition in which is added and dispersed at a predetermined ratio. The thickness, relative dielectric constant and hardness of the intermediate layer are as shown in the table.

  An electrode layer in which CNF is dispersed in reactive bulk acrylic rubber is laminated above and below these six kinds of intermediate layers (dielectric rubber composition), and six kinds of laminates (implemented in the same manner as described above) Examples 44-49) were prepared. Thereafter, an actuation confirmation test and a power generation amount confirmation test similar to those described above were performed on each of these laminates, and the test results (deformability and power generation capacity) are shown in Table 13.

(Example 50, Comparative Example 24)
As shown in Table 14 below, nine conductive rubber laminates according to the present invention obtained in Example 17 were arranged on a core material 60 made of PTFE (polytetrafluoroethylene), and these were arranged as conductive wires. Electrically connected in series and parallel at 70, and their generated power (specific generation voltage, specific generation current) was measured. In addition, the specific generation voltage and the specific generation current are displayed on the basis of Comparative Example 24 using only one conductive rubber laminate according to the present invention obtained in Example 17.
As a result, as shown in the lower column of Table 14, in the case of the series circuit configuration, the ratio generated voltage was 9 times that of Comparative Example 24. Further, even in the case of the parallel circuit configuration, the ratio generated current showed a value nine times that of the comparative example 24.

100 ... Elastomer transducer (conductive rubber laminate)
200 ... Power generation element 10 ... Electrode layer (conductive rubber composition)
20 ... Intermediate layer (dielectric rubber composition)
30 ... Copper electrode
40. High voltage generator
50 ... Fixed plate
60 ... Core material (PTFE)
70: Conductive wire

Claims (11)

An elastomer transducer having an intermediate layer interposed between a pair of electrode layers,
The electrode layer is composed of a conductive rubber composition containing a conductive filler in a base rubber,
An elastomer transducer, wherein the intermediate layer is composed of a dielectric rubber composition containing a dielectric filler in a base rubber. The elastomeric transducer of claim 1, wherein
An elastomer transducer, wherein the dielectric filler of the dielectric rubber composition is an organic compound having a thiocarbonyl group. The elastomer transducer according to claim 1 or 2,
An elastomer transducer, wherein the dielectric rubber composition is at least one of an acrylic resin, a silicon resin, a chlorobrene resin, and a fluorosilicone resin. The elastomer transducer according to claim 2 or 3,
An elastomer transducer, wherein the organic compound having a thiocarbonyl group is at least one of a thiourea derivative, a thioamide derivative, a thioketone derivative, and a dithiocarbamate derivative. The elastomer transducer according to any one of claims 1 to 4,
An elastomer transducer, wherein the base rubber of the conductive rubber composition and the base rubber of the dielectric rubber composition are the same resin. The elastomer transducer according to any one of claims 1 to 5,
An elastomer transducer, wherein the intermediate layer has a thickness of 10 μm to 500 μm, and each electrode layer has a thickness of 0.05 μm to 100 μm. A dielectric rubber composition containing a dielectric filler in a base rubber,
A dielectric rubber composition comprising an organic compound having a thiocarbonyl group as the dielectric filler.   A power generating element comprising the elastomer transducer according to any one of claims 1 to 6 attached on a core material, and a conductive wire connected to each electrode layer of the elastomer transducer.   A plurality of the elastomer transducers according to any one of claims 1 to 6 are mounted on a core material, and the elastomer transducers are electrically connected in series or in parallel with each other by a conductive wire. A power generation element. In the electric power generating element according to claim 8 or 9,
The power generating element, wherein the core material has a sheet shape, a columnar shape, or a cylindrical shape. The power generating element according to any one of claims 8 to 10,
The power generating element, wherein the core material is made of PTFE (polytetrafluoroethylene).

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