107 results about "Dielectric elastomers" patented technology

The invention discloses a zwitter-ion modified acrylate dielectric elastomer film and a preparation method thereof. Zwitter-ions can be selected from sulfobetaine methacrylate (SBMA), carboxyl betaine methacrylate (CBMA), sulfobetaine acrylamide (SBAA) and the like. The acrylate monomer can be butyl acrylate (BA), dodecyl acrylate (LA), isoamyl acrylate (EHA) and the like. Zwitterions (special compounds which simultaneously carry equal positive and negative charges on the same molecule and are electrically neutral on the whole) are copolymerized into an acrylate dielectric elastomer through photo-initiated free radical polymerization reaction, zwitterionic clusters uniformly distributed in the dielectric elastomer can construct traps for capturing high-energy electrons, the leakage current of the material is reduced, and the dielectric property of the material is improved. And the intrinsic breakdown field strength of the material is improved. In addition, the mutual attraction effect between dipole ions with positive and negative charges in the structure provides driving force for intrinsic self-repairing. And after being electrically and mechanically damaged, the material can be self-recovered, so that the service life of the material is prolonged.

The invention relates to a machine learning method of a dielectric elastomer film on-line modeling under equal biaxial prestretching. The method comprises the following steps of: 1, acquiring an experimental data set for generating input data of the physical information neural network in the step 2 and the Kolmogorov-Arnold network in the step 3; 2, building a physical information neural network; the prediction module is used for predicting a mapping relation between invariants I1 and I2 and a strain energy function, and is used for optimization training of the Kolmogorov-Arnold network in the step 3; step 3, constructing a Kolmogorov-Arnold network, and carrying out the construction of the network; an explicit expression used for predicting invariants I1 and I2 and a strain energy function, and generating a constitutive model capable of reflecting the nonlinear behavior of the dielectric elastomer film; and step 4, carrying out joint training of a physical information neural network and a Kolmogorov-Arnold network on the basis of an experimental data set of voltage and stretch ratio obtained by applying voltage after equal biaxial pre-stretching of the dielectric elastomer film obtained in the step 1, and finding out optimal network parameters. According to the invention, the mechanical-electric coupling characteristic of the dielectric elastomer material can be reflected.

The invention relates to a dielectric elastomer-piezoelectric composite multi-source energy collection device for a non-intrusive electric field sensor, and belongs to the technical field of power system self-powered sensors. The device comprises a base, a dielectric elastomer unit, a piezoelectric cantilever beam, a mass block and a rectification energy storage circuit. The dielectric elastomer deforms under the action of an alternating electric field, the piezoelectric cantilever beam is driven through coupling to generate mechanical vibration, and the piezoelectric layer further converts mechanical energy into electric energy to be output. The resonant frequency of the system is adjusted by setting the mass block, so that the resonant frequency is matched with the external electric field frequency or the environment vibration frequency, and the energy conversion efficiency is optimized. The device can collect external electric field energy in a non-intrusive mode and provide a stable power supply required by a low-power-consumption sensor. The device is compact in structure, high in sensitivity and suitable for electric field monitoring in scenes such as ultrahigh-voltage power transmission lines and transformer substations, and provides reliable energy support for self-powered sensors of power equipment.

The present invention provides a high dielectric constant, low modulus, room temperature self-healing dielectric elastomer, comprising the following components: a hydroxyl-terminated polysiloxane, an organic compound containing a disulfide bond, and a silane coupling agent; the hydroxyl-terminated polysiloxane has the following structural formula I: wherein R1 and R2 are independently selected from C 1‑12 Alkyl, C 6‑24 Aryl, C 6‑24 Aryl-substituted C 1‑12 Alkyl, at least one C 1‑12 Alkyl substituted C 6‑24 Aryl; R3 and R4 are independently selected from C 1‑12 Alkyl; each R5 is the same or different and is independently selected from C 0‑12 Alkylene; n is any integer between 4 and 100. The present invention discloses a high-dielectric-constant, low-modulus, room-temperature self-healing dielectric elastomer and a method for preparing the same. The resulting dielectric elastomer has a high dielectric constant, room-temperature self-healing properties, and a low modulus. The preparation method is simple, requires no catalyst or solvent, and is easily controllable, low-cost, and readily industrially scalable. The elastomer is suitable for use in various fields, including artificial muscles, sensors, supercapacitors, polymer generators, and tactile feedback devices.

The invention discloses a high-performance dielectric elastomer film, a driver capable of being driven at low voltage and a preparation method of the driver. According to the preparation method of the high-performance dielectric elastomer film, customization and balance of mechanical properties and electrical properties of a dielectric elastomer are realized by regulating and controlling the proportion of a chemical cross-linking agent, a high-polarity physical cross-linking agent and a monomer; according to the preparation method of the driver capable of being driven at the low voltage, a dielectric elastomer film and a flexible electrode are stacked through an optimized dry stacking method, the dielectric elastomer driver of a multilayer structure is constructed, and the driver has excellent performance under the low driving voltage. The preparation method has the potential of large-batch and large-scale production, and the prepared dielectric elastomer film has low Young modulus and enhanced strain hardening effect, can avoid electromechanical coupling instability, has high dielectric constant, has large-area strain in a low electric field, and can be used for preparing a dielectric elastomer film. The resulting dielectric elastomer driver can have a blocking force of 0.8 N and an energy density of 80 J / kg at a voltage of 500 V.

The invention relates to the technical field of space non-cooperative target capturing and racemization, in particular to a space non-cooperative target variable-stiffness racemization device based on a dielectric elastomer and application of the space non-cooperative target variable-stiffness racemization device, and the space non-cooperative target variable-stiffness racemization device is suitable for attitude control and racemization operation of space tumbling satellites, space debris and other non-cooperative targets. The supporting assembly comprises a middle shaft, a middle shaft servo motor and a fixing base, the middle shaft vertically penetrates through the fixing base, and the middle shaft servo motor is in transmission connection with the middle shaft and used for driving the middle shaft to rotate around the axis of the middle shaft or driving the middle shaft to pitch in the vertical direction so as to adjust the space posture of the arm rotation eliminating body. Compared with the prior art, the racemization device is high in racemization precision, good in operation flexibility, free of fuel consumption and suitable for long-term space tasks.

The invention discloses a dielectric elastomer waist tracking system, a control method, electronic equipment and a storage medium, and belongs to the technical field of dielectric elastomer control. The dielectric elastomer waist chasing system comprises a control chip, a thin film pressure sensor, a dielectric elastomer and two layers of flexible electrodes. The dielectric elastomer is positioned between the two layers of flexible electrodes; the thin film pressure sensor is overlaid on the outer side of any layer of flexible electrode; the control chip is respectively connected with the thin film pressure sensor and the two layers of flexible electrodes; the thin film pressure sensor is used for acquiring real-time pressure data and sending the real-time pressure data to the control chip, and the control chip is used for controlling target voltage to be generated between the two layers of flexible electrodes based on the real-time pressure data; the dielectric elastomer is used for generating deformation based on the target voltage. According to the dielectric elastomer waist chasing system, the problem that the attaching and supporting effect of a traditional seat waist support is poor is solved.

The application provides a preparation method of a polyacrylate composite dielectric elastomer, comprising the following steps: step 1, preparing a polyacrylate dielectric elastomer matrix prepolymer solution; step 2, synthesizing perovskite quantum dot powder with fluorescent properties; step 3, blending the polyacrylate dielectric elastomer matrix prepolymer solution with a perovskite quantum dot solution to obtain a perovskite-doped polyacrylate dielectric elastomer prepolymer solution; and step 4, dropping the perovskite-doped polyacrylate dielectric elastomer prepolymer solution onto a film preparation mold, and preparing a polyacrylate composite dielectric elastomer containing a multilayer perovskite-doped polyacrylate dielectric elastomer film through a wet lamination process under the condition of ultraviolet light irradiation. The polyacrylate composite dielectric elastomer prepared by the preparation method of the polyacrylate composite dielectric elastomer has excellent electrochromic properties and fluorescent properties.

The invention discloses a bendable plane type soft pump driven by a dielectric elastomer. The pump body comprises a pumping sealing layer, a dielectric elastomer film, a negative pressure sealing layer, a one-way valve and a part of hose; the pumping sealing layer is provided with a fluid inlet and a fluid outlet, the one-way valve is connected with the fluid inlet and the fluid outlet through the hose, fluid flows to the fluid inlet through the one-way valve, flows to the fluid outlet through flow channels among a plurality of unit pumping cavities in the pumping sealing layer and flows out of the one-way valve, and the pumping sealing layer is bonded with the dielectric elastomer film through a bonding surface; the dielectric elastomer film is bonded with the negative pressure sealing layer through a bonding surface, one end of the negative pressure sealing layer is provided with an air exhaust hole, and the air exhaust hole is communicated with a plurality of unit negative pressure cavities on the negative pressure sealing layer through flow channels. The soft pump utilizes voltage to control compression of the dielectric elastomer film and realizes volume change of the pumping cavity under the action of negative pressure so as to pump fluid, the pumping function is kept when the soft pump is bent by utilizing the structural infinitesimal, and the soft pump is suitable for a driving device in a soft robot or wearable equipment.

The application discloses a bipolar group acrylate polymer-based dielectric elastomer material and a preparation method thereof, and belongs to the technical field of polymer synthesis. The method comprises the following steps: uniformly mixing hydroxybutyl acrylate and dichloromethane, adding organic acid and acylation catalyst, stirring and reacting, and obtaining a hydroxybutyl acrylate-based diester monomer after purification; then adding a crosslinking agent and a photoinitiator, uniformly mixing, and obtaining the bipolar group acrylate polymer-based dielectric elastomer material after solidification and crosslinking under ultraviolet light irradiation. The bipolar group acrylate polymer-based dielectric elastomer material is prepared by taking hydroxybutyl acrylate as a dielectric elastomer matrix, performing esterification reaction on the dielectric elastomer matrix with organic acid, and then adding a crosslinking agent to prepare a diester-based dielectric elastomer film. The bipolar group acrylate polymer-based dielectric elastomer material solves the problems of high elastic modulus and low dielectric constant, and improves the mechanical properties, driving performance and dielectric properties of the bipolar group acrylate polymer-based dielectric elastomer material.

The invention relates to the field of dielectric elastomers, in particular to a preparation method of a high-performance dielectric elastomer based on a multi-site small-molecule cross-linking agent. According to an existing dielectric elastomer, a double-site cross-linked network is mainly constructed by using a cross-linking agent with two cross-linking sites, but the design has some limitations in practical application, such as small driving deformation and strong driving field. In order to solve the problems, the existing dielectric elastomer is innovatively improved. On the basis of an original dielectric elastomer, a micromolecular crosslinking agent with three or more sites is introduced, so that a multi-site crosslinking network is constructed. By means of the improved design mode, large driving deformation can be achieved, and meanwhile the driving field intensity can be reduced. More possibilities are provided for the use of the dielectric elastomer in various industrial applications, and the practicability and efficiency of the dielectric elastomer are also improved.

The invention relates to a dielectric elastomer and a preparation method and application thereof, and relates to the field of dielectric elastomers, the dielectric elastomer comprises a first urethane acrylate layer, and a cyano group is connected to a urethane acrylate main chain in the first urethane acrylate layer; and a benzene ring is connected to a polyurethane acrylate main chain in the second polyurethane acrylate layer. The dielectric elastomer provided by the invention has a double-layer structure, cyano groups and benzene rings are respectively introduced to main chains of two layers of polyurethane acrylate, so that the photocurable dielectric elastomer with a'push-pull 'charge structure is formed, the dielectric elastomer is endowed with excellent dielectric property, the Young modulus is reduced, high strain under low-voltage driving is realized, and the dielectric elastomer has a wide application prospect. Therefore, the contradiction problem of force-electricity coupling balance of a traditional dielectric elastomer in a flexible driver is solved, and a new thought is provided for large-scale production of the high-performance dielectric elastomer.

The invention belongs to the technical field of flexible sensors, and particularly relates to a dielectric elastomer flexible sensor for distinguishing tension and compression deformation recognition and a preparation method thereof. The dielectric elastomer flexible sensor provided by the invention comprises n stretchable flexible dielectric material layer groups, m stretchable electrode layers and m electrodes, any one stretchable flexible dielectric material layer group comprises at least one stretchable flexible dielectric material layer which is arranged in a stacked mode. A stretchable electrode layer is arranged between any two adjacent stretchable flexible dielectric material layer groups and on the outward surface of the outermost two stretchable flexible dielectric material layer groups; and one stretchable electrode layer is in contact with one electrode. The problems that electric signal output of an existing flexible sensor under the two effects of normal pressure during pressing and axial strain during stretching is very similar and difficult to distinguish directly, post-processing increases complexity, and an integrated sensor is large in manufacturing difficulty and high in cost are solved.

The application discloses a method for analyzing nonlinear dynamics and stress wave propagation characteristics of a dielectric elastomer actuator structure. The method considers the strain hardening effect and viscoelasticity of the dielectric elastomer material, establishes a dynamic model of the dielectric elastomer actuator structure from linear damping assumption and considering material viscoelasticity respectively, calculates the equilibrium deformation and inherent frequency of micro-vibration near the equilibrium state, studies the nonlinear dynamic response of the structure under alternating voltage load, explores the influence law of the constitutive parameters on the nonlinear dynamic response, and analyzes the internal relationship between material viscoelasticity and structure vibration damping. In addition, considering compressibility, the stress wave propagation characteristics in the finite deformation state are studied, the separation phenomenon of transverse wave and longitudinal wave is analyzed, and the influence of the constitutive parameters and strain hardening effect on the stress wave propagation characteristics is explored. The application can provide a theoretical basis for the fine design of the dielectric elastomer actuator and the control of stress wave propagation by adjusting the electric field.

This invention discloses an underwater transparent flexible actuation device, belonging to the field of underwater soft robot technology. The device includes a flexible support frame, a composite actuation film, and conductive connectors. The flexible support frame is a monolithic polymer film with multiple cantilevered support ribs evenly distributed outwards from the center. The composite actuation film is attached and fixed to the flexible support frame and includes two equiaxed pre-stretched dielectric elastomer film layers and a flexible conductive layer sandwiched between them. The two dielectric elastomer film layers self-encapsulate the flexible conductive layer, which is connected to an external power source via conductive connectors. Both the flexible support frame and the composite actuation film are made of transparent materials. By controlling the on / off state of the flexible conductive layer, the flexible support frame is driven to expand and contract to generate buoyancy thrust. This invention solves the problems of complex encapsulation and opacity inherent in traditional DE actuator technology.

A Dielectric Elastomer Actuator has first and second DEA electrodes coupled to electroactive polymer at least one of the DEA electrodes includes a plurality of boundary electrodes configured to detect a localised change in resistivity on the at least one DEA electrode, or detect a localised change in capacitance between the DEA electrodes.

The invention discloses a dielectric elastomer actuator control method based on a fractional order creep hysteresis model, and relates to the field of intelligent material driving control. The method comprises the following steps: constructing a fractional order creep hysteresis model; creep inverse compensation is carried out on the fractional order creep hysteresis model through an inverse compensator; constructing a second-order system state equation of the dielectric elastomer actuator, and defining a tracking error of the dielectric elastomer actuator based on the second-order system state equation and the expected trajectory of the dielectric elastomer actuator; taking convergence of tracking errors in a preset performance boundary as a constraint condition, approaching a nonlinear function in a second-order system state equation of the dielectric elastomer driver by using a radial basis function neural network, and recursively designing a temporary control law and an adaptive law through a backstepping method; and extracting an actual control signal of the dielectric elastomer actuator through a hysteresis implicit inverse algorithm based on a temporary control law and an adaptive law of a backstepping method recursion design. The method can improve the control precision of the dielectric elastomer actuator.

This invention discloses a variable stiffness lower limb exoskeleton robot based on a dielectric elastomer. The exoskeleton robot includes a lumbar support beam, two hip joint modules, two knee joint modules, and two ankle joint modules. A hip joint module is located at each end of the lumbar support beam. The lower ends of the hip joint modules are connected to the knee joint modules via hip joint connectors, and the lower ends of the knee joint modules are connected to the ankle joint modules via calf adjustment plates. This invention utilizes a novel driving principle based on dielectric elastomers, which are lightweight, have high energy density, and fast response speed, thus improving the exoskeleton robot's mobility. Based on the motion mechanism of human lower limb joints, the functions of each joint in the lower limb exoskeleton robot are optimized, enhancing its motion assistance performance. This invention can be well applied to lower limb medical rehabilitation, assisting hemiplegic patients in completing walking training, and has significant practical value.

A vehicle interior component includes a surface configured as a textile and a vibration generator configured to generate a vibration of the surface to remove contaminants present on the surface. The textile includes a dielectric elastomer which deforms elastically in response to an electrical voltage applied to the elastomer. The vibration generator is electrically coupled to the elastomer and configured such that the vibration generator applies the electrical voltage oscillating at an oscillation frequency to the elastomer of the textile in order to generate the vibration of the surface.

The utility model discloses a bionic finger driven by a dielectric elastomer, relates to the technical field of bionic fingers, and solves the problems that a bionic finger in the prior art is complex in structure and cannot meet the requirement for light weight. The finger joint comprises a fixing seat, the fixing seat is sequentially connected with a plurality of middle knuckles and tail end knuckles, hinge structures are fixedly arranged on the middle knuckles and the tail end knuckles, and the fixing seat and the middle knuckles, the adjacent middle knuckles and the middle knuckles and the tail end knuckles are hinged through the hinge structures respectively. The adjacent hinged structures are in transmission fit through a transmission mechanism; a dielectric elastomer driver is arranged on the fixing base, and the movable end of the dielectric elastomer driver is in transmission connection with the hinge structure on the first middle knuckle. According to the utility model, the structure is reliable, the dielectric elastomer driver as a driving power source has a small volume and can maintain a large driving force, the structural complexity is significantly reduced, and the lightweight requirement is met.

The application discloses a preparation method of a core-shell structure electrically-driven dielectric elastomer artificial muscle fiber, relates to the technical field of flexible robot driving, and comprises the following steps: preparing BTO nanotubes with high interfacial polarization by means of hydrothermal synthesis and wet chemical method; preparing a polymer mixed solution by taking TPU as a matrix, BDA as a small-molecule polar plasticizing and polarization aid, and the BTO nanotubes as fillers; adopting a continuous solution dipping core-spun method, taking CNT continuous fibers as conductive core wires, continuously coating to form a core-shell structure fiber, and spraying or depositing a conductive polymer electrode layer on the outer layer to obtain the core-shell structure dielectric elastomer artificial muscle fiber. The application realizes the improvement of the dielectric constant of the shell layer and the maintenance of flexibility by synergistically regulating a high dielectric shell layer system, solves the problems that traditional fillers are prone to agglomeration or the poor compatibility between fillers and polymers leads to high loss or mechanical embrittlement, and it is difficult to balance the dielectricity and flexibility, improves the electric displacement efficiency under low and medium pressure conditions, and meanwhile, high elongation and flexibility are maintained.

The invention provides a cardiac ectoskeleton for treating heart failure, which comprises an ectoskeleton main body, a middle layer of the ectoskeleton main body is a structural member made of a dielectric elastomer material, conductive layers are arranged on two sides of the middle layer, and the conductive layers are structural members made of a conductive material; the detection assembly is used for detecting electrocardiogram data of the heart; the control assembly is used for controlling the outer skeleton main body to contract according to the electrocardio data. The invention has the beneficial effects that the dielectric elastomer has the characteristics of high strain and quick response and is suitable for the contraction function of the cardiac outer skeleton, the polyurethane material and the dielectric elastomer have good biocompatibility, immune response and inflammation are reduced, wireless charging is realized, and a wireless charging system improves the safety and reduces the infection risk.

The invention discloses a preparation method of an electrically driven dielectric elastomer artificial muscle fiber with a core-shell structure, and relates to the technical field of flexible robot driving, and the preparation method comprises the following steps: preparing a high interface polarization BTO nanotube by a hydrothermal synthesis and wet chemical method; the preparation method comprises the following steps: preparing a polymer mixed solution by taking TPU (Thermoplastic Polyurethane) as a matrix, BDA (Butyl Diacrylate) as a polar micromolecule plasticizing and polarization aid and BTO (Boron-Tamyl Oxide) nanotubes as A continuous solution dipping core-spun method is adopted, CNT continuous fibers serve as conductive core wires, core-shell structure fibers are formed through continuous coating, a conductive polymer electrode layer is sprayed or deposited on the outer layer, and the core-shell structure dielectric elastomer artificial muscle fibers are obtained. According to the invention, the dielectric constant of the shell layer is improved and the flexibility is maintained by cooperatively regulating and controlling a high-dielectric shell layer system, the problems of high loss or mechanical embrittlement and difficulty in consideration of dielectric and flexible balance caused by easy agglomeration or poor compatibility of the traditional filler and a polymer are solved, the electrostrictive displacement efficiency under low and medium pressure conditions is improved, and the cost is reduced. Meanwhile, high elongation and flexibility are kept.

The present application relates to a dielectric elastomer with a high dielectric constant, a preparation method and an application thereof, and belongs to the technical field of dielectric elastomers. In the present application, a non-polar rubber such as butadiene-vinyl rubber with a high double bond side group content is modified, specifically by introducing a high dipole moment polar group into the butadiene-vinyl rubber molecular chain by chemical modification, thereby obtaining a dielectric elastomer rubber material with a high dielectric constant. The dielectric constant can also be adjusted by adjusting the number of introduced polar groups, and the mechanical properties can be adjusted by adjusting the vulcanization process, thereby enabling the control of the electrical and mechanical properties of the butadiene-vinyl rubber dielectric elastomer, thereby expanding the applicable field of the butadiene-vinyl rubber dielectric elastomer. In addition, the material also has high elasticity, which is of great significance for its application in flexible actuators, soft robots and other fields.

The application discloses a full-silicon rubber dielectric elastomer driver, a preparation method and application, the dielectric elastomer driver is sequentially from top to bottom a soft electrode layer, a dielectric composite film and a hard electrode layer, the soft electrode layer and the hard electrode layer form an asymmetric electrode structure; the dielectric composite film is prepared into a composite film, namely a CCSR film, by a solution blending method through silicon rubber SR and silane coupling modified carbon black, namely CTES@CB particles; under the action of an applied electric field, the dielectric composite film is deformed under the action of Maxwell electro-elastic force, the hard electrode layer limits the deformation of the corresponding side, and the soft electrode layer releases the deformation of the corresponding side, so that the driver generates enhanced out-of-plane driving displacement. The application provides a preparation technology of a high-dielectric-constant and high-breakdown-strength silicon rubber dielectric film, proposes a strategy of releasing normal deformation by an asymmetric electrode, obtains a DEA driver with enhanced out-of-plane deformation, and realizes continuous dynamic display of a Braille pattern.

The application discloses a numerical simulation method of a viscoelastic nonlinear dielectric elastomer constitutive model, constructs a free energy function of a dielectric elastomer considering a strain hardening effect; obtains a super-elastic constitutive model of the dielectric elastomer according to the free energy function of the dielectric elastomer; based on the obtained super-elastic constitutive model, introduces viscoelasticity of the dielectric elastomer material, and constructs a visco-hyper-elastic constitutive model of the dielectric elastomer; based on the constructed visco-hyper-elastic constitutive model, finite element simulation is carried out on a driver or a sensor structure with the dielectric elastomer as the material to carry out numerical simulation, and electromechanical stability and dynamic response of the dielectric elastomer structure are obtained, thereby laying a theoretical foundation for structure design of the dielectric elastomer. The application provides a new method for accurately calculating critical instability voltage of a complex dielectric elastomer structure, and also provides a possibility for accurately simulating dynamic behaviors of the dielectric elastomer.

The invention provides a dry-type flexible stretchable electrode with a conductive-high dielectric heterostructure, an array high-density electrode group and a preparation method and application of the dry-type flexible stretchable electrode and the array high-density electrode group. The dry-type flexible stretchable electrode comprises a high-dielectric elastomer layer and a conductive layer which are arranged in a stacked mode. The high-dielectric elastomer layer is obtained by doping or permeating a conductive or dielectric material into an elastomer; the conductive layer is formed by printing and depositing gold, silver, copper, carbon or conductive macromolecules; one side, far away from the conductive layer, of the high-dielectric elastomer layer is used for being attached to a human body; the side, away from the high-dielectric elastomer layer, of the conductive layer is connected with an acquisition card through an electrode wire and used for human body electrophysiological signal detection. According to the utility model, the device can be instantly used after being pasted, so that the use convenience is greatly improved, the problem of signal attenuation caused by gel drying is avoided, the environmental electromagnetic influence is avoided or weakened, and the device is particularly suitable for long-term and continuous physiological signal monitoring.

The invention discloses an anti-snagging bird eye cloth fiber surface nanometer groove closing regulation and control method, and relates to the technical field of textile material surface intelligent regulation and control, and the method comprises the following steps: carrying out stress anchoring pretreatment on a fiber substrate to form a fractal branch crack network and dielectric elastomer composite structure; constructing a humidity response unit, wherein the humidity response unit comprises an ionic liquid gel micro-spring array and a photo-thermal response mesoporous coating; through a cooperation mechanism of low-humidity rigid screening and a high-humidity dynamic valve, closed regulation and control are conducted on the nano groove; according to the invention, a fractal crack double-frequency decoupling mechanism is constructed, a dielectric elastomer is combined to regulate and control a humidity threshold value, an ionic liquid micro-spring quantitatively closes a groove and retains a ventilation channel, and a photo-thermal response coating is cooperated to form double-trigger screening, so that full-scene protection of low-humidity rigid snagging prevention and high-humidity dynamic ventilation is realized; the opposite function limitation of a traditional material is broken through, and the snagging resistance, the breathability and the multifunctional protection capacity of the fabric are remarkably improved.

The invention discloses a synthetic jet pipeline robot driven by a dielectric elastomer, and belongs to the technical field of pipeline robots. A dielectric elastomer driver serves as a flexible driving unit, the driver is tightly connected with a latex film of a tail cavity through a device, the driver continuously drives the film to enable the volume of the tail cavity of the robot to periodically change, and synthetic jet is generated; the robot can be stably propelled in a narrow, complex and bent liquid filling pipeline without mechanical driving structures such as propellers. The structure of the pipeline detection robot is designed, so that the robot structure is soft and can adapt to narrow, complex and bent liquid filling pipelines, and meanwhile, the robot is driven by synthetic jet to have the capacity of rapidly moving in the narrow, complex and bent liquid filling pipelines. According to the invention, a brand new solution is provided for the detection of the narrow, complex and bent liquid-filled pipeline, and meanwhile, the practical application of the synthetic jet propulsion technology in engineering detection and other scenes is promoted.

The invention provides a repairable low-viscoelasticity polyacrylate dielectric elastomer and a preparation method and application thereof, and belongs to the technical field of high polymer materials.The preparation method comprises the steps that firstly, surfactant components of different types and contents are introduced to construct multi-type non-covalent interaction with polyacrylate matrix chain segments; secondly, vinyl-terminated polydimethylsiloxane and hydroxypropyl-terminated polydimethylsiloxane are grafted in polyacrylate, so that the viscoelasticity of the polyacrylate dielectric elastomer is reduced, and finally, the repairable composite polyacrylate elastomer with low viscoelasticity is obtained. Compared with a pure polyacrylate elastomer, the Young modulus is increased, the ductility is improved, the dielectric constant is improved, the maximum area strain rate is reduced, the out-of-plane actuating drift displacement is reduced, the actuating stability is improved, the comprehensive performance is very excellent, and the application prospect in related fields is expanded.