An ultrahigh discharged energy density achieved in an inhomogeneous PVDF dielectric composite filled with 2D MXene nanosheets <i>via</i> interface engineering

Feng, Yefeng; Deng, Qihuang; Peng, Cheng; Hu, Jianbing; Li, Yandong; Wu, Qin; Xu, Zhichao

doi:10.1039/c8tc05180a

Cited by 80 publications

(35 citation statements)

References 48 publications

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“…For instance, An et al [36] realized MXene coatings of stretchable Polydimethylsiloxane that can withstand a large-scale mechanical deformation while maintaining an electrical conductivity as high as 20 S·cm −1 . Feng et al [37] prepared the sandwich Polyvinylidene fluoride (PVDF) composite and demonstrated improved electrical properties. The permittivity of ~26 at 100 Hz, a breakdown strength of ~350 MV·m −1 and AC conductivity 10 −11 S·cm −1 at 100 Hz was reported.…”

Section: Introductionmentioning

confidence: 99%

Electrically Conductive, Transparent Polymeric Nanocomposites Modified by 2D Ti3C2Tx (MXene)

et al. 2019

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The electrically conductive, transparent, and flexible self-standing thin nanocomposite films based on copolyamide matrix (coPA:Vestamelt X1010) modified with 2D Ti3C2Tx (MXene) nanosheets were prepared by casting and their electrical, mechanical and optical properties and then, were investigated. The percolation threshold of the MXene filler within the coPA matrix was found to be 0.05 vol. %, and the highest determined electrical conductivity was 1.4 × 10−2 S·cm−1 for the composite filled with 5 wt. % (1.8 vol. %) of MXene. The electrical conductivity of the as-prepared MXene was 9.1 S·cm–1, and the electrical conductivity of the MAX phase (the precursor for MXene preparation) was 172 S·cm–1. The transparency of the prepared composite films exceeded 75%, even for samples containing 5 wt. % of MXene, as confirmed by UV spectroscopy. The dynamic mechanical analysis confirmed the improved mechanical properties, such as the storage modulus, which improved with the increasing MXene content. Moreover, all the composite films were very flexible and did not break under repeated twisting. The combination of the relatively high electrical conductivity of the composites filled with low filler content, an appropriate transparency, and good mechanical properties make these materials promising for applications in flexible electronics.

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Section: Introductionmentioning

confidence: 99%

Electrically Conductive, Transparent Polymeric Nanocomposites Modified by 2D Ti3C2Tx (MXene)

et al. 2019

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“…Much work has demonstrated that enhanced dielectric constant can be achieved at high filler loading but at the expense of breakdown strength of polymer nanocomposites [23][24][25][26]. Actually, high loading of nanoparticles induces the formation of defects including nonuniform distribution of nanofillers, insufficient interfacial interactions between nanofillers and polymer matrices and occurrence of voids [27][28][29]. The charge separation at interfaces and strong electric field intensification usually lead to clear frequency dependence of dielectric properties and reduced breakdown strength [30][31][32][33].…”

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confidence: 99%

“…To tackle this challenge, the key is to ensure uniform dispersion of nanofillers and good interfacial compatibility in the polymer nanocomposites at high filler loading [27][28][29][30]37]. Considering the fact that the physiochemical properties of nanofillers and polymer matrices show a great disparity, and large surface-to-volume ratio of nanofillers [38][39][40][41].…”

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confidence: 99%

Chemically bonding BaTiO₃ nanoparticles in highly filled polymer nanocomposites for greatly enhanced dielectric properties

Chen

Zhang

et al. 2020

J. Mater. Chem. C

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“…The Flack parameter of 0.04(5) confirms this fact. 35 Stability Studies in Aqueous Media. Studies in aqueous relevant media of the new bipyridine-based compounds were performed prior to in vitro evaluation in order to access their stability.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Ruthenium–Cyclopentadienyl Bipyridine–Biotin Based Compounds: Synthesis and Biological Effect

et al. 2019

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Prospective anticancer metallodrugs should consider target-specific components in their design in order to overcome the limitations of the current chemotherapeutics. The inclusion of vitamins, which receptors are overexpressed in many cancer cell lines, has proven to be a valid strategy. Therefore, in this paper we report the synthesis and characterization of a set of new compounds [Ru(η 5 -C 5 H 5 )(P(C 6 H 4 R) 3 )(4,4′-R′-2,2′-bpy)] + (R = F and R′ = H, 3; R = F and R′ = biotin, 4; R = OCH 3 and R′ = H, 5; R = OCH 3 and R′ = biotin, 6), inspired by the exceptional good results recently obtained for the analogue bearing a triphenylphosphane ligand. The precursors for these syntheses were also described following modified literature procedures, [Ru(η 5 -C 5 H 5 )(P(C 6 H 4 R) 3 ) 2 Cl], where R is −F (1) or −OCH 3 (2). The structure of all compounds is fully supported by spectroscopic and analytical techniques and by X-ray diffraction studies for compounds 2, 3, and 5. All cationic compounds are cytotoxic in the two breast cancer cell lines tested, MCF7 and MDA-MB-231, and much better than cisplatin under the same experimental conditions. The cytotoxicity of the biotinylated compounds seems to be related with the Ru uptake by the cells expressing biotin receptors, indicating a potential mediated uptake. Indeed, a biotin−avidin study confirmed that the attachment of biotin to the organometallic fragment still allows biotin recognition by the protein. Therefore, the biotinylated compounds might be potent anticancer drugs as they show cytotoxic effect in breast cancer cells at low dose dependent on the compounds' uptake, induce cell death by apoptosis and inhibit the colony formation of cancer cells causing also less severe side effects in zebrafish.

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An ultrahigh discharged energy density achieved in an inhomogeneous PVDF dielectric composite filled with 2D MXene nanosheets via interface engineering

Abstract: Simultaneously improved permittivity and breakdown strength, accompanied with reduced dielectric loss and conductivity, are difficult to achieve in polymer nanocomposites with conductive fillers by blending to construct a homogeneous structure.

Cited by 80 publications

References 48 publications

Electrically Conductive, Transparent Polymeric Nanocomposites Modified by 2D Ti3C2Tx (MXene)

Electrically Conductive, Transparent Polymeric Nanocomposites Modified by 2D Ti3C2Tx (MXene)

Chemically bonding BaTiO₃ nanoparticles in highly filled polymer nanocomposites for greatly enhanced dielectric properties

Ruthenium–Cyclopentadienyl Bipyridine–Biotin Based Compounds: Synthesis and Biological Effect

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An ultrahigh discharged energy density achieved in an inhomogeneous PVDF dielectric composite filled with 2D MXene nanosheets via interface engineering

Abstract: Simultaneously improved permittivity and breakdown strength, accompanied with reduced dielectric loss and conductivity, are difficult to achieve in polymer nanocomposites with conductive fillers by blending to construct a homogeneous structure.

Cited by 80 publications

References 48 publications

Electrically Conductive, Transparent Polymeric Nanocomposites Modified by 2D Ti3C2Tx (MXene)

Electrically Conductive, Transparent Polymeric Nanocomposites Modified by 2D Ti3C2Tx (MXene)

Chemically bonding BaTiO3 nanoparticles in highly filled polymer nanocomposites for greatly enhanced dielectric properties

Ruthenium–Cyclopentadienyl Bipyridine–Biotin Based Compounds: Synthesis and Biological Effect

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Chemically bonding BaTiO₃ nanoparticles in highly filled polymer nanocomposites for greatly enhanced dielectric properties