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High performance dielectric composites by latex compounding of graphene oxide-encapsulated carbon nanosphere hybrids with XNBR
| Content Provider | Semantic Scholar |
|---|---|
| Author | Tian, Ming Li, Xiao-Lin Zhang, Liqun Nishi, T. Nobuyoshi Ning, Nanying |
| Copyright Year | 2014 |
| Abstract | A novel dielectric composite with high dielectric constant (k), low dielectric loss, low elastic modulus and large actuated strain at a low electric field was prepared by a simple, low-cost and efficient method. The graphene oxide nanosheet (GO)-encapsulated carbon nanosphere (GO@CNS) hybrids were fabricated for the first time via π–π interaction and hydrogen bonding interaction by simply mixing the CNS and GO suspension. The assembly of GO@CNS hybrids around rubber latex particles was realized by hydrogen bonding interaction between carboxylated nitrile rubber (XNBR) and GO@CNS hybrids during latex compounding. The thermally reduced GO (RGO)@CNS/XNBR composites were then obtained from GO@CNS/XNBR by vulcanization and in situ thermal reduction, resulting in the formation of a segregated filler network. The results showed that k at 103 Hz obviously increased from 28 for pure XNBR to 400 for the composite with 0.75 vol% of the hybrids because of the formation of a segregated filler network and the increased interfacial polarization ability of the hybrids after in situ partial thermal reduction. Meanwhile, the composite with 0.75 vol% of the hybrids retained low conductivity (10−7 S m−1), resulting in low dielectric loss (<0.65 at 103 Hz). In addition, the elastic modulus only mildly increased with the addition of 0.75 vol% of the hybrids, retaining the good flexibility of the composites. More interestingly, the actuated strain at 7 kV mm−1 obviously increased from 2.69% for pure XNBR to 5.68% for the composite with 0.5 vol% of RGO@CNS, and the actuated strain at a lower electric field (2 kV mm−1) largely increased from 0.23% for pure XNBR to 3.06% for the composite with 0.75 vol% of RGO@CNS, which is much higher than that of other dielectric elastomers reported in previous studies, facilitating the application of the dielectric elastomer in biological and medical fields, where a low electric field is required. |
| Starting Page | 11144 |
| Ending Page | 11154 |
| Page Count | 11 |
| File Format | PDF HTM / HTML |
| DOI | 10.1039/C4TA01600A |
| Volume Number | 2 |
| Alternate Webpage(s) | https://pubs.rsc.org/en/content/getauthorversionpdf/C4TA01600A |
| Alternate Webpage(s) | http://www.rsc.org/suppdata/ta/c4/c4ta01600a/c4ta01600a1.pdf |
| Alternate Webpage(s) | https://doi.org/10.1039/C4TA01600A |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
