Polymer nanocomposites with high energy density and low dielectric loss are highly desirable in electronic electric industry. Achieving the ability to tailor interface between polymer nanoparticle is key issue realize properties nanocomposites. However, understanding of role on still very poor. In this work, we report a novel strategy improve constant nanoparticles (i.e., BaTiO3) ferroelectric [i.e., poly(vinylidene fluoride-co-hexafluoro propylene)]. Core–shell structured BaTiO3 either...

The incorporation of graphene sheets (GSs) into polymer matrices affords engineers an opportunity to synthesize composites with excellent physical performances. However, the development high performance GS-based is difficult because easy aggregation GSs in a matrix as well weak interfacial adhesion between and host polymer. Herein, we present simple effective route hyperbranched aromatic polyamide functionalized (GS–HBA). resulting GS-HBA exhibits uniform dispersion thermoplastic...

Polymer nanocomposites with high dielectric constant have extensive applications in the electronic and electrical industry because of ease processing low cost. Blending situ polymerization are two conventional methods for preparation polymer nanocomposites. However, resulting nanocomposites, particularly highly filled generally some disadvantages such as loss thus show energy density efficiency. Here we developed a core@double-shell strategy to prepare barium titanate (BT)-based performance...

Lead-free (1−x)(0.8Bi0.5Na0.5TiO3-0.2SrTiO3)-xNaNbO3 (x = 0–0.1, abbreviated as BNT-ST-xNN) ceramics were fabricated by a conventional sintering route with pure perovskite phase via XRD analysis. Raman spectrum was exploited in order to give an insight into the variation of local structural evolution. All compositions exhibited obvious evolution dielectric relaxation behaviors. Dielectric and ferroelectric properties clarified that crossover from nonergodic ergodic relaxor obtained addition...

The introduction of high dielectric constant ceramic nanoparticles into an insulating polymer is important approach to prepare nanocomposites for electric energy storage applications. A key obtaining desirable properties the homogeneous dispersion in corresponding polymer. Conventional methods used improve nanoparticle enhance physical interaction between and matrix via surface modification. In this work, covalent bonding was utilized simultaneously nanoparticle/polymer by functionalizing...

Preventing bacterial infections and accelerating wound closure are essential in the process of healing. Current dressings lack enough mechanical properties, self-healing ability, tissue adhesiveness, killing also relies on use antibiotic drugs. Herein, a well-designed hybrid hydrogel dressing is constructed by simple copolymerization acrylamide (AM), 3-acrylamido phenylboronic acid (AAPBA), chitosan (CS), nanoscale tannic (TA)/ferric ion (Fe3+) complex (TFe). The resulting possesses lots...

Polymer-based materials with a high dielectric constant show great potential for energy storage applications. Since the intrinsic of most polymers is very low, integration carbon nanotubes (CNTs) into provides an attractive and promising way to reach owing their outstanding physical performances. However, these CNT-based composites usually suffer from loss, low breakdown strength difficulty tailor constant. Herein, we have designed fabricated new class candidates composed graphene...

Nano-micro structure of modified 2-D and 0-D ceramic fillers is designed for epoxy with high thermal conductivity breakdown strength.

Nanodielectric materials with high dielectric constant, low loss, and energy storage capability are highly desirable in modern electric electronics industries. It has been proved that the preparation of core-shell structured polymer nanocomposites via "grafting from" method is an effective approach to these materials. However, by using this approach, deep understanding structure-dielectric property relationship nanodielectrics limited because lack detailed information (e.g., molecular...

Polymer nanocomposites with the dielectric constant comparable to that of percolative composites are successfully prepared by using core–shell structured hyperbranched aromatic polyamide grafted barium titanate (BT-HBP) hybrid nanofiller. Poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) (PVDF-TrFE-CFE) was used as polymer matrix because its high intrinsic and easy processability. The BT-HBP nanofiller were a solution polymerization diaminobenzoic acid on surface...

Flexible nanocomposites comprising of polymer and high‐dielectric‐constant (high‐ k ) ceramic nanoparticles are becoming increasingly attractive for dielectric energy storage applications in modern electronic electric industry. However, a huge challenge still remains. Namely, the increase constant usually at cost significant decrease breakdown strength because field distortion concentration induced by high‐ filler. To address this long‐standing problem, using nano‐Ag decorated core–shell...

The interfacial region plays a critical role in determining the electrical properties and energy storage density of dielectric polymer nanocomposites. However, we still know little about effects regions on In this work, three types core–shell structured polymer@BaTiO3 nanoparticles with shells having different were used as fillers to prepare ferroelectric All prepared by surface-initiated reversible-addition–fragmentation chain transfer (RAFT) polymerization, controlled have same thickness....

Flexible nanodielectric materials with high dielectric constant and low loss have huge potential applications in the modern electronic electric industry. Graphene sheets (GS) reduced-graphene oxide (RGO) are promising fillers for preparing flexible polymer-based because of their unique two-dimensional structure excellent electrical mechanical properties. However, easy aggregation GS/RGO significantly limits graphene enhancing polymer composites. In addition, poor filler/matrix nanoscale...

A novel route to prepare core-shell structured nanocomposites with excellent dielectric performance is reported. This approach involves the grafting of polystyrene (PS) from surface BaTiO(3) by an in situ RAFT polymerization. The PS/BaTiO(3) not only show significantly increased constant and very low loss, but also have a weak frequency dependence properties over wide range frequencies. In addition, can be easily tuned varying thickness PS shell. Our method promising for preparing...

Electrostatic capacitors have been applied into high-power-density pulsed power systems comprising moderate energy density and ultrafast charging/discharging in the order of magnitude with a few milliseconds. In this article, different BaTiO3 nanostructures (e.g., nanoparticles, nanofibers, nanotubes, core–shell structure nanofibers) were synthesized used to prepare polymer composite films poly(vinylidene fluoride) (PVDF) matrix. The effects on dielectric constant, loss, alternating current...

The combination of carbon nanomaterial with three-dimensional (3D) porous polymer substrates has been demonstrated to be an effective approach manufacture high-performance stretchable conductive materials (SCMs). However, it remains a challenge fabricate 3D-structured SCMs outstanding electrical conductivity capability under large strain in facile way. In this work, the 3D printing technique was employed prepare poly(dimethylsiloxane) (O-PDMS) which then integrated nanotubes and graphene...

In this study, the electrocaloric effect (ECE) of Bi0.5Na0.5TiO3–0.06BaTiO3 (BNT–0.06BT) ceramic has been directly measured using a home-made adiabatic calorimeter. The maximum temperature change (ΔT) approaches 0.86 K under an electric field 5 kV/mm at 110 °C, which provides experimental evidence for optimizing ECE near type–I pseudo–first–order phase transition (PFOPT). Most importantly, considerable ΔT value can be maintained over wide range well above PFOPT high field. addition, is...