Electric‐field response behaviors of chitosan/barium titanate composite hydrogel elastomers

Abstract

Chitosan/barium titanate (BaTiO 3 ) composite hydrogel elastomers were prepared in the presence or absence of an applied direct-current (dc) electric field. Scanning electron microscopy was used to observe the microstructure of the elastomers and the dispersion of particles in it. Tests of the storage moduli (Gs) of the elastomers were investigated with a dynamic mechanical analyzer. On this basis, the G increment and increment sensitivity were explored. The results show that the particles were sequentially dispersed, and the values of the G values for the elastomer were higher under an external applied dc electric field; this indicated that the composite elastomers exhibited excellent electric field response. Furthermore, the electric-field response of the composite elastomers changed with the particle concentration, and the maximum response occurred when the mass fraction of BaTiO 3 was 2.0%. The G value of the composite elastomer with a BaTiO 3 weight percentage of 2.0 increased with increasing electric field; this revealed that the composite elastomer had a positive electric field response.

Fabrication and excellent electroresponsive properties of ideal PMMA@BaTiO3 composite particles

“…Competition between the two kinds of electrostatic forces can cause the particles to form chains and support elastomers in the eld direction. 44,45 Therefore, the adjacent aligned particles in the B elastomers (E ¼ 0.8 kV mm À1 ) in the eld direction could resist stress better than the randomly distributed particles in the A elastomers (E ¼ 0 kV mm À1 ). As a result, DG/G A > 0.…”

Biophysical stimulation for bone regeneration using a chitosan/barium titanate ferroelectric composite

“…36 Aggregation of BT nanoparticles into the chitosan matrix may occur as a consequence of electrostatic interaction formation after being polarized under an applied field. 37…”

Creep and recovery behaviors of electrorheological elastomers and time-electric field superposition principle

“…The electrorheological property of EREs is primarily related to the polarization and attraction of filler particles under electric field, and the particle content has been proven to play an important role in electrorheological performance of ER materials. It is an effective method to adjust the mechanical properties of electro/magneto sensitive materials by changing the particle content of them [39,40]. Thus, it is necessary to discuss the effect of particle content on creep and recovery behavior.…”