TY - JOUR
T1 - Plasticizer-induced enhanced electromechanical performance of natural rubber dielectric elastomer composites
AU - Ni, Yufeng
AU - Yang, Dan
AU - Wei, Qungui
AU - Yu, Liyuan
AU - Ai, Jia
AU - Zhang, Liqun
N1 - Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2020/7/28
Y1 - 2020/7/28
N2 - Herein, high-dielectric-constant titanium dioxide (TiO2) nanoparticles, modified by γ-methacryloxypropyl trimethoxy silane (referred as mTiO2) and polar dioctyl phthalate (DOP), were introduced into natural rubber (NR) to obtain high-performance dielectric elastomer composites. The incorporation of DOP sharply decreased the elastic modulus of mTiO2/NR composites by decreasing the entanglement between NR chains and weakening the enforcement effect of mTiO2 nanoparticles. At the same time, highly polar DOP improved the dielectric constant of mTiO2/NR composites and resulted in high electromechanical sensitivity (β). Finally, a large actuated strain of 25.3% has been rendered by 50 phr DOP/mTiO2/NR composite at 40 kV/mm, which is ~10 times higher than pure NR (2.6%) under the same electric field. The present study reveals that the plasticizer-enhanced flexibility of inorganic dielectric filler/polymer composites is an effective method to enhance the electromechanical performance of dielectric elastomer actuators.
AB - Herein, high-dielectric-constant titanium dioxide (TiO2) nanoparticles, modified by γ-methacryloxypropyl trimethoxy silane (referred as mTiO2) and polar dioctyl phthalate (DOP), were introduced into natural rubber (NR) to obtain high-performance dielectric elastomer composites. The incorporation of DOP sharply decreased the elastic modulus of mTiO2/NR composites by decreasing the entanglement between NR chains and weakening the enforcement effect of mTiO2 nanoparticles. At the same time, highly polar DOP improved the dielectric constant of mTiO2/NR composites and resulted in high electromechanical sensitivity (β). Finally, a large actuated strain of 25.3% has been rendered by 50 phr DOP/mTiO2/NR composite at 40 kV/mm, which is ~10 times higher than pure NR (2.6%) under the same electric field. The present study reveals that the plasticizer-enhanced flexibility of inorganic dielectric filler/polymer composites is an effective method to enhance the electromechanical performance of dielectric elastomer actuators.
KW - Elastic modulus
KW - Functional composites
KW - Mechanical properties
KW - Nano particles
KW - Polymer-matrix composites (PMCs)
UR - https://www.scopus.com/pages/publications/85083882744
U2 - 10.1016/j.compscitech.2020.108202
DO - 10.1016/j.compscitech.2020.108202
M3 - 文章
AN - SCOPUS:85083882744
SN - 0266-3538
VL - 195
JO - Composites Science and Technology
JF - Composites Science and Technology
M1 - 108202
ER -