Improved electromechanical properties of brominated butyl rubber filled with modified barium titanate

Abstract

Barium titanate (BT) particles, BT-KH570 particles, and polar plasticizer tri-n-butyl phosphate (TBP) were added into BIIR matrix to form a dielectric elastomer composite, which had a high dielectric constant, good mechanical properties, and large actuated strain.

Electrical and mechanical characterization of vulcanized natural rubber filled with BaTiO3 ceramic filler

“…28 The absorption spectrum of the BaTiO 3 particles bands at 935 and 1035 cm −1 can be ascribed to the Si–OH and Si–O–C stretching vibration, respectively. 30 The existence of 1126 and 1166 cm −1 bands are linked to stretching vibration of Si–O–Si from KH-570. 30 Besides, the spectrum of UMBT particles exhibits a peak at 3440 cm −1 which confirms the presence of hydroxyl groups (–OH) on the surface.…”

“…30 The existence of 1126 and 1166 cm −1 bands are linked to stretching vibration of Si–O–Si from KH-570. 30 Besides, the spectrum of UMBT particles exhibits a peak at 3440 cm −1 which confirms the presence of hydroxyl groups (–OH) on the surface. 31 Alkoxy groups (OCH 3 ) can alcoholize with the hydroxyl groups on the surface particle and produce strong interactions between the KH-570 and BaTiO 3 particles.…”

Ternary silicone dielectric elastomer micro‐nanocomposites with enhanced mechanical and electromechanical properties

“…Another is to modify BT nanoparticles by silane coupling agents to improve the dispersion, such as 3‐aminopropyltriethoxysilane (KH550), [ 32 ] γ‐(2,3‐epoxypropoxy)‐propytrimethoxysilane (KH560), [ 33 ] γ‐methacryloxypropyl trimethoxy silane (KH570), [ 34 ] bis‐(γ‐triethoxysilylpropyl)‐tetrasulfide (KH845‐4). [ 35 ] By using a silane coupling agent, a “molecular bridge” can be set up at the interface between inorganic and organic substances, connecting two materials with different properties.…”

Actuation Behavior of Multilayer Graphene Nanosheets/Polydimethylsiloxane Composite Films

“…For dielectric elastomer actuators, the elastomer matrix is very important because it governs dielectric constant, dielectric breakdown strength and obtainable strain. Silicone elastomers, including the polydimethylsiloxane (PDMS), are one of the most frequently used materials for dielectric elastomer actuators due to their good elasticity, reliability and fast response speed [7,8,9,10,11]. They produce repeatable, reproducible actuation upon activation, they show little tendency for Mullins (stress softening) and ageing effects and they have been shown to actuate (at low strains) to more than 4 million cycles, in some instances more than 400 million cycles, without failure [12,13].…”

“…The addition of a filler with high constant to the elastomer system is one of the most investigated solutions to this challenge. Inorganic particles (TiO 2 and titanates) [7,15], metals (iron, cobalt and titanium complexes) [16], organo-clays (montmorillonite) [17], as well as conductive fillers (carbon black, carbon nanotubes, and exfoliated graphite) [18,19] have been added in silicone matrix to investigate the actuator application. For the optimal system, a balance will have to be found between reinforcement and constant increase while not compromising the elastic modulus.…”