Electroactive Polymers, or EAPs, are polymers that display a change in admeasurement or appearance back angry by an electric field. The best accepted applications of this blazon of actual are in actuators and sensors. A archetypal appropriate acreage of an EAP is that they will abide a ample bulk of anamorphosis while comestible ample forces. The majority of celebrated actuators are fabricated of bowl piezoelectric materials. While these abstracts are able to bear ample forces, they frequently will alone batter a atom of a percent. In the backward 1990s, it has been approved that some EAPs can display up to a 380% strain,1 which is abundant added than any bowl actuator. Another one of the best accepted applications for EAPs is in the acreage of robotics in the development of bogus muscles. Due to this actuality one of the best accepted and adorable applications, EAPs are generally referred to as bogus muscles. A animation cartoon of a arresting accessory application EAPs as "fingers" to anchor a brawl is depicted in Figure 1.
Sunday, 18 December 2011
History of EAPs
The acreage of EAPs emerged aback in 1880, back Wilhelm Roentgen advised an agreement in which he activated the aftereffect of an electrical accepted on the automated backdrop of a elastic band.2 The elastic bandage was anchored at one end and was absorbed to a accumulation at the other. It was again answerable and absolved to abstraction the change in breadth with electrical current. M.P. Sacerdote followed up on Roentgen’s agreement by formulating a approach on ache acknowledgment to an activated electric acreage in 1899.2 It wasn’t until the year 1925 that the aboriginal piezoelectric polymer was apparent (Electret). Electret was formed by accumulation carnauba wax, adhesive and beeswax, and again cooling the band-aid while it is accountable to an activated DC electrical bias. The admixture would again coalesce into a polymeric actual that apparent a piezoelectric effect.
Polymers that acknowledge to ecology altitude added than an activated electrical accepted accept additionally been a ample allotment of this breadth of study. In 1949, Katchalsky et al. approved that back collagen filaments are biconcave in acerbic or acrid solutions they would acknowledge with a change in volume.2 The collagen filaments were begin to aggrandize in an acerb band-aid and arrangement in an acrid solution. Although added stimuli (such as pH) accept been investigated, due to its affluence and acumen best analysis has been adherent to developing polymers that acknowledge to electrical stimuli in adjustment to actor biological systems.
It wasn’t until the backward 1960s back the abutting above advance in EAPs was observed. In 1969, Kawai was able to authenticate that polyvinylidene fluoride (PVDF) exhibits a ample piezoelectric effect.2 This sparked analysis absorption in developing added polymers systems that would appearance a agnate effect. In 1977, the aboriginal electrically administering polymers were apparent by Hideki Shirakawa et al.3 Shirakawa forth with Alan MacDiarmid and Alan Heeger approved that polyacetylene was electrically conductive, and that by doping it with iodine vapor, they could enhance its appliance by 8 orders of magnitude. Thus the conductance was abutting to that of a metal. By the backward 1980s a cardinal of added polymers had been apparent to display a piezoelectric aftereffect or were approved to be conductive.
In the aboriginal 1990s, ionic polymer-metal composites were developed and apparent to display electroactive backdrop far above to antecedent EAPs. The above advantage of IPMCs was that they were able to appearance activation (deformation) at voltages as low as 1 or 2 volts.2 This is orders of consequence beneath than any antecedent EAP. Not alone was the activation activity for these abstracts abundant lower, but they could additionally abide abundant beyond deformations. IMPCs were apparent to display anywhere up to 380% strain, orders of consequence beyond than ahead developed EAPs.1 In 1999, one of the antecedents of the acreage of robotics and bogus muscles, Yoseph Bar-Cohen, proposed the Armwrestling Bout of EAP Automatic Arm Against Animal Challenge.2 This was a claiming in which analysis groups about the apple competed to architecture a automatic arm consisting of EAP anatomy that could defeat a animal in an arm angry match. The aboriginal claiming was captivated at the Electroactive Polymer Actuators and Devices Conference in 2005.2 Addition above anniversary of the acreage is that the aboriginal commercially developed accessory including EAPs as an bogus beef was produced in 2002 by Eamex in Japan.1 This accessory was a angle that is able to bathe on its own, affective its appendage appliance an EAP muscle. But the advance in activated development is not satisfactory, apparently due to ambiguous in axiological research.4
edit Types of Electroactive Polymers
EAP can accept several configurations, but are about disconnected in two arch classes: Dielectric and Ionic.
edit Dielectric EAPs
Dielectric EAPs, are abstracts in which actuation is acquired by electrostatic armament amid two electrodes which clasp the polymer. Dielectric elastomers are able of actual aerial strains and are fundamentally a capacitor that changes its capacitance back a voltage is activated by acceptance the polymer to abbreviate in array and aggrandize in breadth due to the electric field. This blazon of EAP about requires a ample actuation voltage to aftermath aerial electric fields (hundreds to bags of volts), but actual low electrical ability consumption. Dielectric EAPs crave no ability to accumulate the actuator at a accustomed position. Examples are electrostrictive polymers and dielectric elastomers.
edit Ferroelectric Polymers
Ferroelectric Polymers56 are a accumulation of apparent arctic polymers that are additionally ferroelectric, acceptation that they advance a abiding electric animosity that can be reversed, or switched, in an alien electric field. Ferroelectric polymers, such as polyvinylidene fluoride(PVDF), are acclimated in acoustic transducers and electromechanical actuators because of their inherent piezoelectric response, and as calefaction sensors because of their inherent pyroelectric response.7
Figure 1: Anatomy of Poly(vinylidene fluoride)
edit Electrostrictive Affix Polymers
Figure 2: Cartoon of an electrostrictive affix polymer.
Electrostricive affix polymers abide of adjustable courage chains with aberration ancillary chains. The ancillary chains on adjoining courage polymers cantankerous articulation and anatomy clear units. The courage and ancillary alternation clear units can again anatomy polarized monomers, which accommodate atoms with fractional accuse and accomplish dipole moments, apparent in Figure 2.8 Back an electrical acreage is applied, a force is activated to anniversary fractional allegation and causes circling of the accomplished polymer unit. This circling causes electrostrictive ache and anamorphosis of the polymer.
edit Aqueous Apparent Polymers
Main-chain aqueous apparent polymers accept mesogenic groups affiliated to anniversary added by a adjustable spacer. The mesogens aural a courage anatomy the mesophase anatomy causing the polymer itself to accept a anatomy accordant with the anatomy of the mesophase. The absolute coupling of the aqueous apparent adjustment with the polymer anatomy has accustomed main-chain aqueous apparent elastomers a ample bulk of interest.9 The amalgam of awful aggressive elastomers leads to accept a ample ache thermal actuation forth the polymer alternation administration with temperature aberration consistent in different automated backdrop and abeyant applications as automated actuators.
edit Ionic EAPs
Ionic EAPs, in which actuation is acquired by the displacement of ions central the polymer. Alone a few volts are bare for actuation, but the ionic breeze implies a college electrical ability bare for actuation, and activity is bare to accumulate the actuator at a accustomed position. Examples of ionic EAPS are conductive polymers, ionic polymer-metal composites (IPMCs), and acknowledging gels. Yet addition archetype is a Bucky gel actuator, which is a polymer-supported band of polyelectrolyte actual consisting of an ionic aqueous sandwiched amid two electrode layers consisting of a gel of ionic aqueous absolute single-wall carbon nanotubes.10 As the name implies, these gel actuators can additionally be fabricated with bucky assurance instead of nanotubes.11
edit Electrorheological Fluid
Main article: Electrorheological Fluid
Figure 3: The cations in the ionic polymer-metal blended are about aggressive in the absence of an electric field. Once a acreage is activated the cations accumulate to the ancillary of the polymer in acquaintance with the anode causing the polymer to bend.
Electrorheological fluids change the bendability of a band-aid with the appliance of an electric field. The aqueous is a abeyance of polymers in a low dielectric-constant liquid.12 With the appliance of a ample electric acreage the bendability of the abeyance increases. Abeyant applications of these fluids accommodate shock absorbers, agent mounts and acoustic dampers.12
edit Ionic polymer-metal composite
Main article: Ionic polymer-metal composite
Ionic polymer-metal composites abide of a attenuate ionomeric film with blue-blooded metal electrodes argent on its surface. It additionally has cations to antithesis the allegation of the anions anchored to the polymer backbone.13 They are actual alive actuators that appearance actual aerial anamorphosis at low activated voltage and appearance low impedance. Ionic polymer-metal composites assignment through electrostatic allure amid the cationic adverse ions and the cathode of the activated electric field, a schematic representation is apparent in Figure 3. These types of polymers appearance the greatest swear for bio-mimetic uses as collagen fibers are about composed of accustomed answerable ionic polymers.14 Nafion and Flemion are frequently acclimated ionic polymer metal composites.15
Polymers that acknowledge to ecology altitude added than an activated electrical accepted accept additionally been a ample allotment of this breadth of study. In 1949, Katchalsky et al. approved that back collagen filaments are biconcave in acerbic or acrid solutions they would acknowledge with a change in volume.2 The collagen filaments were begin to aggrandize in an acerb band-aid and arrangement in an acrid solution. Although added stimuli (such as pH) accept been investigated, due to its affluence and acumen best analysis has been adherent to developing polymers that acknowledge to electrical stimuli in adjustment to actor biological systems.
It wasn’t until the backward 1960s back the abutting above advance in EAPs was observed. In 1969, Kawai was able to authenticate that polyvinylidene fluoride (PVDF) exhibits a ample piezoelectric effect.2 This sparked analysis absorption in developing added polymers systems that would appearance a agnate effect. In 1977, the aboriginal electrically administering polymers were apparent by Hideki Shirakawa et al.3 Shirakawa forth with Alan MacDiarmid and Alan Heeger approved that polyacetylene was electrically conductive, and that by doping it with iodine vapor, they could enhance its appliance by 8 orders of magnitude. Thus the conductance was abutting to that of a metal. By the backward 1980s a cardinal of added polymers had been apparent to display a piezoelectric aftereffect or were approved to be conductive.
In the aboriginal 1990s, ionic polymer-metal composites were developed and apparent to display electroactive backdrop far above to antecedent EAPs. The above advantage of IPMCs was that they were able to appearance activation (deformation) at voltages as low as 1 or 2 volts.2 This is orders of consequence beneath than any antecedent EAP. Not alone was the activation activity for these abstracts abundant lower, but they could additionally abide abundant beyond deformations. IMPCs were apparent to display anywhere up to 380% strain, orders of consequence beyond than ahead developed EAPs.1 In 1999, one of the antecedents of the acreage of robotics and bogus muscles, Yoseph Bar-Cohen, proposed the Armwrestling Bout of EAP Automatic Arm Against Animal Challenge.2 This was a claiming in which analysis groups about the apple competed to architecture a automatic arm consisting of EAP anatomy that could defeat a animal in an arm angry match. The aboriginal claiming was captivated at the Electroactive Polymer Actuators and Devices Conference in 2005.2 Addition above anniversary of the acreage is that the aboriginal commercially developed accessory including EAPs as an bogus beef was produced in 2002 by Eamex in Japan.1 This accessory was a angle that is able to bathe on its own, affective its appendage appliance an EAP muscle. But the advance in activated development is not satisfactory, apparently due to ambiguous in axiological research.4
edit Types of Electroactive Polymers
EAP can accept several configurations, but are about disconnected in two arch classes: Dielectric and Ionic.
edit Dielectric EAPs
Dielectric EAPs, are abstracts in which actuation is acquired by electrostatic armament amid two electrodes which clasp the polymer. Dielectric elastomers are able of actual aerial strains and are fundamentally a capacitor that changes its capacitance back a voltage is activated by acceptance the polymer to abbreviate in array and aggrandize in breadth due to the electric field. This blazon of EAP about requires a ample actuation voltage to aftermath aerial electric fields (hundreds to bags of volts), but actual low electrical ability consumption. Dielectric EAPs crave no ability to accumulate the actuator at a accustomed position. Examples are electrostrictive polymers and dielectric elastomers.
edit Ferroelectric Polymers
Ferroelectric Polymers56 are a accumulation of apparent arctic polymers that are additionally ferroelectric, acceptation that they advance a abiding electric animosity that can be reversed, or switched, in an alien electric field. Ferroelectric polymers, such as polyvinylidene fluoride(PVDF), are acclimated in acoustic transducers and electromechanical actuators because of their inherent piezoelectric response, and as calefaction sensors because of their inherent pyroelectric response.7
Figure 1: Anatomy of Poly(vinylidene fluoride)
edit Electrostrictive Affix Polymers
Figure 2: Cartoon of an electrostrictive affix polymer.
Electrostricive affix polymers abide of adjustable courage chains with aberration ancillary chains. The ancillary chains on adjoining courage polymers cantankerous articulation and anatomy clear units. The courage and ancillary alternation clear units can again anatomy polarized monomers, which accommodate atoms with fractional accuse and accomplish dipole moments, apparent in Figure 2.8 Back an electrical acreage is applied, a force is activated to anniversary fractional allegation and causes circling of the accomplished polymer unit. This circling causes electrostrictive ache and anamorphosis of the polymer.
edit Aqueous Apparent Polymers
Main-chain aqueous apparent polymers accept mesogenic groups affiliated to anniversary added by a adjustable spacer. The mesogens aural a courage anatomy the mesophase anatomy causing the polymer itself to accept a anatomy accordant with the anatomy of the mesophase. The absolute coupling of the aqueous apparent adjustment with the polymer anatomy has accustomed main-chain aqueous apparent elastomers a ample bulk of interest.9 The amalgam of awful aggressive elastomers leads to accept a ample ache thermal actuation forth the polymer alternation administration with temperature aberration consistent in different automated backdrop and abeyant applications as automated actuators.
edit Ionic EAPs
Ionic EAPs, in which actuation is acquired by the displacement of ions central the polymer. Alone a few volts are bare for actuation, but the ionic breeze implies a college electrical ability bare for actuation, and activity is bare to accumulate the actuator at a accustomed position. Examples of ionic EAPS are conductive polymers, ionic polymer-metal composites (IPMCs), and acknowledging gels. Yet addition archetype is a Bucky gel actuator, which is a polymer-supported band of polyelectrolyte actual consisting of an ionic aqueous sandwiched amid two electrode layers consisting of a gel of ionic aqueous absolute single-wall carbon nanotubes.10 As the name implies, these gel actuators can additionally be fabricated with bucky assurance instead of nanotubes.11
edit Electrorheological Fluid
Main article: Electrorheological Fluid
Figure 3: The cations in the ionic polymer-metal blended are about aggressive in the absence of an electric field. Once a acreage is activated the cations accumulate to the ancillary of the polymer in acquaintance with the anode causing the polymer to bend.
Electrorheological fluids change the bendability of a band-aid with the appliance of an electric field. The aqueous is a abeyance of polymers in a low dielectric-constant liquid.12 With the appliance of a ample electric acreage the bendability of the abeyance increases. Abeyant applications of these fluids accommodate shock absorbers, agent mounts and acoustic dampers.12
edit Ionic polymer-metal composite
Main article: Ionic polymer-metal composite
Ionic polymer-metal composites abide of a attenuate ionomeric film with blue-blooded metal electrodes argent on its surface. It additionally has cations to antithesis the allegation of the anions anchored to the polymer backbone.13 They are actual alive actuators that appearance actual aerial anamorphosis at low activated voltage and appearance low impedance. Ionic polymer-metal composites assignment through electrostatic allure amid the cationic adverse ions and the cathode of the activated electric field, a schematic representation is apparent in Figure 3. These types of polymers appearance the greatest swear for bio-mimetic uses as collagen fibers are about composed of accustomed answerable ionic polymers.14 Nafion and Flemion are frequently acclimated ionic polymer metal composites.15
Comparison of Electronic and Ionic EAPs
Dielectronic polymers are able to authority their induced displacement while activated beneath a DC voltage.16 This allows dielectronic polymers to be advised for automatic applications. These types of abstracts additionally accept aerial automated activity body and can be operated in air after a above abatement in performance. However, dielectronic polymers crave actual aerial activation fields (>10 v/um) that are abutting to the breakdown level.
The activation of ionic polymers, on the added hand, requires alone 1-2 volts. They about charge to advance wetness, admitting some polymers accept been developed as cocky independent encapsulated activators which allows their use in dry environments.14 Ionic polymers additionally accept a low electromechanical coupling. They are about ideal for the bio-mimetic devices.
edit Characterization
While there are abounding altered means electroactive polymers can be characterized, alone three will be addressed here: stress-strain curve, activating automated thermal analysis, and dielectric thermal analysis.
edit Stress-Strain Curve
Main article: Stress-strain curve
Figure 4: The unstressed polymer spontaneously forms a bankrupt structure, aloft appliance of a accent the polymer regains its aboriginal length.
Stress ache curves accommodate advice about the polymer’s automated backdrop such as the brittleness, animation and crop backbone of the polymer. This is done by accouterment a force to the polymer at a compatible amount and barometer the anamorphosis that results.17 An archetype of this anamorphosis is apparent in Figure 4. This address is advantageous for free the blazon of actual (brittle, tough, etc.), but it is a annihilative address as the accent is added until the polymer fractures.
edit Activating automated thermal assay (DMTA)
Main article: Activating automated analysis
Both activating automated assay is a non annihilative address that is advantageous in compassionate the apparatus of anamorphosis at a atomic level. In DMTA a sinusoidal accent is activated to the polymer, and based on the polymer’s anamorphosis the adaptable modulus and damping characteristics are acquired (assuming the polymer is a damped harmonic oscillator).17 Adaptable abstracts booty the automated activity of the accent and catechumen it into abeyant activity which can after be recovered. An ideal bounce will use all the abeyant activity to achieve its aboriginal appearance (no dampening), while a aqueous will use all the abeyant activity to flow, never abiding to its aboriginal position or appearance (high dampening). A viscoeleastic polymer will display a aggregate of both types of behavior.17
edit Dielectric thermal assay (DETA)
Main article: Dielectric thermal analysis
DETA is agnate to DMTA, but instead of an alternating automated force an alternating electric acreage is applied. The activated acreage can advance to animosity of the sample, and if the polymer contains groups that accept abiding dipoles (as in Figure 2), they will adjust with the electrical field.17 The permittivity can be abstinent from the change in amplitude and bound into dielectric accumulator and accident components. The electric displacement acreage can additionally be abstinent by afterward the current.17 Once the acreage is removed, the dipoles will relax aback into a accidental orientation.
The activation of ionic polymers, on the added hand, requires alone 1-2 volts. They about charge to advance wetness, admitting some polymers accept been developed as cocky independent encapsulated activators which allows their use in dry environments.14 Ionic polymers additionally accept a low electromechanical coupling. They are about ideal for the bio-mimetic devices.
edit Characterization
While there are abounding altered means electroactive polymers can be characterized, alone three will be addressed here: stress-strain curve, activating automated thermal analysis, and dielectric thermal analysis.
edit Stress-Strain Curve
Main article: Stress-strain curve
Figure 4: The unstressed polymer spontaneously forms a bankrupt structure, aloft appliance of a accent the polymer regains its aboriginal length.
Stress ache curves accommodate advice about the polymer’s automated backdrop such as the brittleness, animation and crop backbone of the polymer. This is done by accouterment a force to the polymer at a compatible amount and barometer the anamorphosis that results.17 An archetype of this anamorphosis is apparent in Figure 4. This address is advantageous for free the blazon of actual (brittle, tough, etc.), but it is a annihilative address as the accent is added until the polymer fractures.
edit Activating automated thermal assay (DMTA)
Main article: Activating automated analysis
Both activating automated assay is a non annihilative address that is advantageous in compassionate the apparatus of anamorphosis at a atomic level. In DMTA a sinusoidal accent is activated to the polymer, and based on the polymer’s anamorphosis the adaptable modulus and damping characteristics are acquired (assuming the polymer is a damped harmonic oscillator).17 Adaptable abstracts booty the automated activity of the accent and catechumen it into abeyant activity which can after be recovered. An ideal bounce will use all the abeyant activity to achieve its aboriginal appearance (no dampening), while a aqueous will use all the abeyant activity to flow, never abiding to its aboriginal position or appearance (high dampening). A viscoeleastic polymer will display a aggregate of both types of behavior.17
edit Dielectric thermal assay (DETA)
Main article: Dielectric thermal analysis
DETA is agnate to DMTA, but instead of an alternating automated force an alternating electric acreage is applied. The activated acreage can advance to animosity of the sample, and if the polymer contains groups that accept abiding dipoles (as in Figure 2), they will adjust with the electrical field.17 The permittivity can be abstinent from the change in amplitude and bound into dielectric accumulator and accident components. The electric displacement acreage can additionally be abstinent by afterward the current.17 Once the acreage is removed, the dipoles will relax aback into a accidental orientation.
Applications of EAP
EAP abstracts can be calmly bogus into assorted shapes due to the affluence in processing abounding polymeric materials, authoritative them actual able materials. One abeyant appliance for EAPs is that they can potentially be chip into microelectromechanical systems (MEMS) to aftermath acute actuators. As the best -to-be applied analysis direction, EAPs accept been activated in bogus muscles.18 Their adeptness to challenge the operation of biological anatomy with aerial breach toughness, ample actuation ache and inherent beating damping draw the absorption of scientists in this field.2
In contempo years, “electro alive polymers for refreshable Braille displays”19 has emerged to aid the visually broken in fast account and computer assisted communication. This abstraction is based on application an EAP actuator configured in an arrangement form. Rows of electrodes on one ancillary of an EAP blur and columns on the added actuate alone elements in the array. Each aspect is army with a Braille dot and is bargain by applying a voltage beyond the array of the called element, causing bounded array reduction. Under computer control, dots would be activated to actualize concrete patterns of highs and lows apery the advice to be read.
Small pumps can additionally be accomplished by applying EAP materials. These pumps could be acclimated for biologic delivery, microfluidic devices, alive breeze control, and a aggregation of customer applications. The best acceptable agreement for a pump based on actuators would be a bifold diaphragm device. The advantages that an ionomeric pump could action would be low voltage (battery) operation, acutely low babble signature, aerial arrangement efficiency, and awful authentic ascendancy of breeze rate.20
Another technology that can account from the different backdrop of EAP actuators is optical membranes. Due to their low modulus, the automated impedance of the actuators, they are well-matched to accepted optical film materials. Also, a distinct EAP actuator is able of breeding displacements that ambit from micrometers to centimeters. For this reason, these abstracts can be acclimated for changeless appearance alteration and jitter suppression. These actuators could additionally be acclimated to actual for optical aberrations due to atmospheric interference.21
Since these abstracts display accomplished electroactive character, EAP abstracts appearance abeyant in biomimetic-robot research, accent sensors and acoustics field, which will accomplish EAPs become a added adorable abstraction affair in the abreast future. They accept been acclimated for assorted actuators such as face anatomy and arm anatomy in humanoid robots.22
In contempo years, “electro alive polymers for refreshable Braille displays”19 has emerged to aid the visually broken in fast account and computer assisted communication. This abstraction is based on application an EAP actuator configured in an arrangement form. Rows of electrodes on one ancillary of an EAP blur and columns on the added actuate alone elements in the array. Each aspect is army with a Braille dot and is bargain by applying a voltage beyond the array of the called element, causing bounded array reduction. Under computer control, dots would be activated to actualize concrete patterns of highs and lows apery the advice to be read.
Small pumps can additionally be accomplished by applying EAP materials. These pumps could be acclimated for biologic delivery, microfluidic devices, alive breeze control, and a aggregation of customer applications. The best acceptable agreement for a pump based on actuators would be a bifold diaphragm device. The advantages that an ionomeric pump could action would be low voltage (battery) operation, acutely low babble signature, aerial arrangement efficiency, and awful authentic ascendancy of breeze rate.20
Another technology that can account from the different backdrop of EAP actuators is optical membranes. Due to their low modulus, the automated impedance of the actuators, they are well-matched to accepted optical film materials. Also, a distinct EAP actuator is able of breeding displacements that ambit from micrometers to centimeters. For this reason, these abstracts can be acclimated for changeless appearance alteration and jitter suppression. These actuators could additionally be acclimated to actual for optical aberrations due to atmospheric interference.21
Since these abstracts display accomplished electroactive character, EAP abstracts appearance abeyant in biomimetic-robot research, accent sensors and acoustics field, which will accomplish EAPs become a added adorable abstraction affair in the abreast future. They accept been acclimated for assorted actuators such as face anatomy and arm anatomy in humanoid robots.22
Future Directions
The acreage of EAPs is far from mature, which leaves several issues that still charge to be formed on.2 The achievement and abiding adherence of the EAP should be bigger by designing a baptize closed surface. This will anticipate the dehydration of baptize independent in the EAP, and additionally abate the abeyant accident of the absolute adverse ions back the EAP is operating abysmal in an aqueous environment. Bigger apparent application should be explored application methods to aftermath a defect-free conductive surface. This could possibly be done application metal breath degradation or added doping methods. It may additionally be accessible to advance conductive polymers to anatomy a blubbery conductive layer. Calefaction aggressive EAP would be adorable to acquiesce operation at college voltages after damaging the centralized anatomy of the EAP due to the bearing of calefaction in the EAP composite. Development of EAPs in altered configurations (e.g., fibers and cilia bundles), would additionally be beneficial, in adjustment to access the ambit of accessible modes of motion.
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