Abstract Dielectric elastomer actuators (DEAs) with large electrically-actuated strain can build light-weight and flexible non-magnetic motors. However, dielectric elastomers commonly used in the field of soft actuation suffer from high stiffness, low strength, driving field, severely limiting DEA’s actuating performance. Here we design a new polyacrylate optimized crosslinking network by rationally employing difunctional macromolecular agent. The proposed simultaneously possesses desirable...

The surface morphology of dielectric films has a great effect on the insulation performance. Remarkably improved capacitive performance is realized by adjusting electrode–dielectric interface.

Abstract Polymer‐based dielectrics with fast electrostatic energy storage and release, are crucial for advanced electronics power systems. However, the deterioration of insulation performance charge–discharge efficiency polymer at elevated temperatures high electric fields hinder applications capacitors in harsh environments. Herein, a facile scalable approach is reported to fabricating flexible high‐temperature high‐efficiency by ultraviolet irradiation. The resultant dielectric films...

Multilayer structural design (including sandwich structure) has received wide attention due to its complementary advantages of different layers in the field high energy density dielectric materials. Although multilayer polymer composites with improved breakdown strength and have been prepared some studies, key mechanism is not clear. In this work, kinds films consisting various pure [polyimide, poly(vinylidene fluoride) (PVDF), polypropylene (PP)] were investigate underlying performances by...

Abstract Large deformability and high sensitivity is difficult to be realized simultaneously in flexible sensors. Herein, taking advantage of the permittivity highly active surfaces ultrasmall barium titanate nanoparticles (BT NPs) stretchability p(BA‐GMA) elastomer matrix, we propose a high‐performance soft stretchable sensor. The addition BT NPs can not only increase capacitance polyacrylate‐matrix composite dielectric material obtain sensitivity, but also basically maintains excellent...

Abstract Dielectric elastomer actuators (DEAs) face an acknowledged challenge: On the one hand, majority of elastomers only achieve small electroactive deformation (<20%) in absence prestretch; on other rare capable showing large require relatively complicated processing and chemistry. This work addresses this challenge by fabricating with a network side groups, which achieves very (218%) without pre‐stretch. can be rapidly massively fabricated within few min, polymerizing commercial...

Electroactive polymer (EAP) is a kind of smart material, which can change its shape under the stimulation electric field. Dielectric elastomer (DE) an important member EAP. DE has characteristics excellent performance, such as light weight, low noise, cost, and so on, guarantee wide applications in fields actuators, generators, sensors. In this review, principles energy conversion, research status latest development new technologies for DEs, performance DEs are summarised. Simultaneously, it...

ABSTRACT With the rapid development of flexible wearable devices and transducers, plenty studies have been conducted in recent years on dielectric elastomers (DEs) for various applications due to their significant deformation ability, high energy conversion efficiency, lightweight. However, DEs usually need pre‐stretching enhance electric breakdown strengths produce large deformation, increasing complexity driving structures limiting applications. In this work, electromechanical properties...

Abstract Information plays a crucial role in guiding behavioral decisions during public health emergencies. Individuals communicate to acquire relevant knowledge about an epidemic, which influences their adopt protective measures. However, whether disseminate specific information is also decision. In light of this understanding, we develop coupled information-vaccination-epidemic model depict these co-evolutionary dynamics three-layer network. Negative dissemination and vaccination are...

Abstract Dielectric elastomer actuator (DEA) is considered as an ideal artificial muscle with soft and light in nature, widespread application robotics sensors. (DE), the core component of DEA, high output force large actuation strain under relatively low driving electric field critical for high‐performance DEA. However, widely used VHB series (3M) DE suffered from very pre‐strain voltage to get their performance, limiting scope application. In this work, DEs good mechanical dielectric...

Abstract The addition‐type liquid silicone rubber (ALSR) co‐filled with spheroidal Al 2 O 3 and flaky BN was prepared by the mechanical blending hot press methods to enhance thermal, electrical, properties for industrial applications. Morphologies of ALSR composites were observed scanning electron microscopy (SEM). It found that interaction dispersion state fillers in matrix improved introduction sheets. Thermal, performances also investigated this work. result indicated thermal conductivity...

Abstract The solid-state transformer (SST) in the renewable energy grid is developing way of high voltage and frequency, which often results a sharp increase heat production equipment accelerates failure insulating materials. Epoxy resin (EPR) commonly used as an insulation material for SST due to its excellent electrical properties, processing performance (viscosity), low price. However, thermal conductivity EPR only about 0.2 W/(m·K), leads poor under frequency temperature. To enhance...

Abstract Increasing the actuation characteristics of dielectric elastomer actuators (DEAs) under low electric field strength without compromising elasticity and breakdown is still one great challenges in application field. Herein, we propose a simple, efficient, controllable strategy to prepare elastomers with intrinsically good integrated properties by introducing styrene ethylene butylene (SEBS) thermoplastic polyurethane (TPU). Combined experiments molecular dynamics simulation, find that...

Dielectric elastomers, used as driver modules, require high power density to enable fast movement and efficient work of soft robots. Polyacrylate elastomers usually suffer from low under electric fields due limited response frequency. Here, we propose a bimodal network polyacrylate dielectric elastomer which breaks the intrinsic coupling relationship between mechanical properties, featuring relatively constant, Young's modulus, wide driving frequency bandwidth (~200 Hz) like silicones....

Recent advances in the electrospinning technique offer significant opportunities for improved fiber reinforced polymer composites of interest capacitor applications. Classical effective medium approximation may fail to reach exact solutions due intricately inhomogeneous distribution depolarizing field fibers with arbitrary orientation degrees. In this work, a three-dimensional finite element method (FEM) model has been developed in-depth study effects alignment on dielectric response...

Dielectric elastomers (DEs) are widely studied as artificial muscles due to their large actuation strain and fast electromechanical response. Currently, the commonly used acrylate DEs require high prestretching subjected a electric field achieve excellent performance. In this work, we prepared with very simple prescriptions by UV curing method. The have low mechanical losses (<4%) dielectric constants (≥5.67) obtain (30.2%) under relatively (31.6 kV/mm) non-prestretching. This is because...

ABSTRACT A vinyl amine–vinyl alcohol copolymer (VAm–VOH) was synthesized through free‐radical polymerization, basic hydrolysis in methanol, acidic water, and an anion‐exchange process. In the copolymer, primary amino groups on VAm segment acted as carrier for CO 2 ‐facilitated transport, used to reduce crystallinity increase gas permeance. VAm–VOH/polysulfone (PS) composite membranes separation were prepared with VAm–VOH a selective layer PS ultrafiltration membrane support. The...