Dielectric elastomer sensor with high dielectric constant and capacitive strain sensing properties by designing polar-nonpolar fluorosilicone multiblock copolymers and introducing poly(dopamine) modified CNTs

Largely improved generating energy density, efficiency, and fatigue life of DEG by designing TiO2/LNBR/SiR DE composites with a self-assembled structure

“…Similar results have been reported in our previous studies. 21,24,28 The curves of tan d (representing dielectric loss) versus frequency of the as prepared samples and VHB 4905 are shown in Fig. S6(b), † and the tan d at 10 À1 Hz of all samples are summarized in Fig.…”

“…First, although grafting polar dipole groups onto SiR chains by chemical modification can largely improve the ε r of SiR, it can also lead to a significant increase in electrical conductivity, 19 and thus an increase in leakage current, which can lead to a large decrease in Δ E . 20 In addition, the grafting of polar dipole groups onto SiR chains can also lead to a decrease in elongation at break because of the significant decrease in molecular weight of SiR, 21 which can lead to a decrease in tensile strain that can be applied during the energy harvesting process, and thus a decrease in Δ E and w of DEG. The ε r of SiR can also be significantly increased by filling a small amount of conductive filler, but it also leads to a dramatic increase in electrical conductivity and significant decrease in E b .…”

Liquid Metal Patterned Stretchable and Soft Capacitive Sensor with Enhanced Dielectric Property Enabled by Graphite Nanofiber Fillers

“…The dielectric behavior of the composites is highly governed by factors such as concentration of incorporated fillers, their structural morphology and orientation, dispersity, percolation threshold, etc. With their unique electro-mechanical properties combined with various advantages such as lightness, elastic energy, technological adaptability, thermal stability and flexibility, dielectric elastomers have found application in various fields covering skin sensors [20][21][22], actuators [21,23,24], energy harvesting [25][26][27], and artificial muscles [28][29][30].…”

Enhanced Dielectric Properties of Polydimethylsiloxane Elastomer-Based Composites with Cyanosilicone

“…This approach often comes at the cost of increased material modulus of elasticity and is significantly detrimental to the improvement of the actuation properties of the elastomer. The second approach is introducing conductive fillers to the silicone elastomer matrix. , Yadav et al incorporated a small amount of uniform silicone-grafted multiwalled carbon nanotubes (silicone-g-MWCNTs) into silicone dielectric elastomers, which greatly enhanced the mechanical, dielectric, and electromechanical properties of the resulting nanocomposites . However, it often leads to a significant increase in dielectric loss and a sharp decrease in electrical breakdown strength due to leakage currents.…”