TY - JOUR
T1 - Enhanced electromechanical properties of natural rubber using highly efficient and cost-effective mussel-inspired modification of TiO2 nanoparticles
AU - Yang, Dan
AU - Ni, Yufeng
AU - Kong, Xinxin
AU - Xue, Hao
AU - Guo, Wenli
AU - Zhang, Liqun
N1 - Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2019/11/30
Y1 - 2019/11/30
N2 - Recently, dopamine and its secondary function are being used as the intermediate to tailor the surface molecular structure of high-dielectric-constant nanoparticles, which improves interfacial interaction of dielectric elastomer (DE) composites, due to their versatile adhesion properties. However, the high-cost of dopamine limits the large-scale applications of DE. Herein, a mussel-inspired modification of TiO2 nanoparticles is presented to prepare high-performance natural rubber (NR) DE composites by replacing dopamine with cheaper poly(catechol/polyamine) (PCPA). First, the TiO2 nanoparticles were deposited with PCPA. Then, the PCPA-coated TiO2 nanoparticles were further grafted with γ-methacryloxypropyl trimethoxy silane (KH570), which contains double bonds and denoted as TiO2-PCPA-KH570. Owing to the presence of C[dbnd]C bonds, the TiO2-PCPA-KH570 nanoparticles participated in the vulcanization of NR and the TiO2-PCPA-KH570/NR composites exhibited enhanced filler dispersion and interfacial interaction, leading to the improved mechanical, dielectric, and electromechanical properties. Furthermore, the 10 phr TiO2-PCPA-KH570/NR composite resulted in the largest actuated strain of 12.3%, which is ~2 times higher than that of the largest actuated strain of pure NR (6.0%). The present study provides a high-efficient and cost-effective route to obtain DEAs with enhanced electromechanical properties.
AB - Recently, dopamine and its secondary function are being used as the intermediate to tailor the surface molecular structure of high-dielectric-constant nanoparticles, which improves interfacial interaction of dielectric elastomer (DE) composites, due to their versatile adhesion properties. However, the high-cost of dopamine limits the large-scale applications of DE. Herein, a mussel-inspired modification of TiO2 nanoparticles is presented to prepare high-performance natural rubber (NR) DE composites by replacing dopamine with cheaper poly(catechol/polyamine) (PCPA). First, the TiO2 nanoparticles were deposited with PCPA. Then, the PCPA-coated TiO2 nanoparticles were further grafted with γ-methacryloxypropyl trimethoxy silane (KH570), which contains double bonds and denoted as TiO2-PCPA-KH570. Owing to the presence of C[dbnd]C bonds, the TiO2-PCPA-KH570 nanoparticles participated in the vulcanization of NR and the TiO2-PCPA-KH570/NR composites exhibited enhanced filler dispersion and interfacial interaction, leading to the improved mechanical, dielectric, and electromechanical properties. Furthermore, the 10 phr TiO2-PCPA-KH570/NR composite resulted in the largest actuated strain of 12.3%, which is ~2 times higher than that of the largest actuated strain of pure NR (6.0%). The present study provides a high-efficient and cost-effective route to obtain DEAs with enhanced electromechanical properties.
KW - Dielectric elastomer
KW - Electromechanical properties
KW - Poly(catechol/polyamine)
KW - Silane grafting
KW - Surface modification
UR - https://www.scopus.com/pages/publications/85070725866
U2 - 10.1016/j.apsusc.2019.143638
DO - 10.1016/j.apsusc.2019.143638
M3 - 文章
AN - SCOPUS:85070725866
SN - 0169-4332
VL - 495
JO - Applied Surface Science
JF - Applied Surface Science
M1 - 143638
ER -