Durability sensor using low concentration carbon nano additives

Chang Liu*, Khalid Lafdi, Francisco Chinesta

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

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.
Original languageEnglish
Article number108202
Number of pages8
JournalComposites Science and Technology
Volume195
Early online date23 Apr 2020
DOIs
Publication statusPublished - 28 Jul 2020

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