Porous graphene sandwich/poly(vinylidene fluoride) composites with high dielectric properties

Chu, Libing; Xue, Qingzhong; Sun, Jin; Xia, Fujun; Wang, Xing; Xia, Dan; Dong, Mingdong

doi:10.1016/j.compscitech.2013.07.001

Cited by 81 publications

(42 citation statements)

References 32 publications

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“…Most interestingly, the typical dielectric performance of the polymeric composite films using graphitic fillers, which was the simultaneous display of high dielectric constants and high dielectric losses, was not observed in our prepared films. These findings correspond to results by a few other researchers who have reported polymeric composite films with relatively high dielectric constant and low dielectric losses [24][25][26][27][28][29][30].…”

Section: Fig 5 -Xrd Patterns Of Rgo-pei Pvdf-hfp and Rgo-pei/pvdf-hsupporting

confidence: 95%

“…Preliminary successes have been achieved by using one or combinations of these strategies. Of particular interest is that, through increased experimentation, the micro-capacitor model was suggested to be the mechanism causing the phenomena observed for the dielectric films with relative high dielectric constants and low losses [24][25][26][27][28][29][30]. Despite the inherent challenges, research investigating the preparation of dielectric films with a high dielectric constant and low loss and the establishment of theoretical models to explain the phenomena and to guide practical applications remain highly desirable.…”

Section: Introductionmentioning

confidence: 98%

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Achieving significantly enhanced dielectric performance of reduced graphene oxide/polymer composite by covalent modification of graphene oxide surface

Tong

Zhang

et al. 2015

Carbon

113

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Section: Fig 5 -Xrd Patterns Of Rgo-pei Pvdf-hfp and Rgo-pei/pvdf-hsupporting

confidence: 95%

Section: Introductionmentioning

confidence: 98%

Achieving significantly enhanced dielectric performance of reduced graphene oxide/polymer composite by covalent modification of graphene oxide surface

Tong

Zhang

et al. 2015

Carbon

113

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“…A disadvantage of this approach is that it is complicated and time-consuming. In addition, the coating of GO on silica (SiO 2 ), metal oxide particles, or carbon nanosphere is an efficient method to prevent GO from self-agglomerating, as reported in previous studies [25,[30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Simultaneously improved actuated performance and mechanical strength of silicone elastomer by reduced graphene oxide encapsulated silicon dioxide

Ning

Wang

Zhang

et al. 2015

International Journal of Smart and Nano Materials

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Herein, graphene oxide (GO)-encapsulated silica (SiO 2 ) hybrids (GO@SiO 2 ) were prepared via electrostatic self-assembly of the 3-aminopropyltriethoxysilane (APS)-modified SiO 2 and GO. The as-prepared GO@SiO 2 was introduced into polydimethylsiloxane (PDMS) elastomer to simultaneously increase the dielectric constant (k) and mechanical properties of PDMS. Then, the in situ thermal reduction of GO@SiO 2 / PDMS composites was conducted at 180°C for 2 h to increase the interfacial polarizability of GO@SiO 2 . As a result, the values of k at 1000 Hz are largely improved from 3.2 for PDMS to 13.3 for the reduced GO@SiO 2 (RGO@SiO 2 )/PDMS elastomer. Meanwhile, the dielectric loss of the composites remains low (<0.2 at 1000 Hz). More importantly, the actuated strain at low electric field (5 kV/mm) obviously increases from 0.3% for pure PDMS to 2.59% for the composites with 60 phr of RGO@SiO 2 , an eightfold increase in the actuated strain. In addition, both the tensile strength and elastic modulus are obviously improved by adding 60 phr of RGO@SiO 2 , indicating a good reinforcing effect of RGO@SiO 2 on PDMS. Our goal is to develop a simple and effective way to improve the actuated performance and mechanical strength of the PDMS dielectric elastomer for its wider application.

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“…20-23 A lot of relevant studies have been carried out based on graphene in the matrix of polyaniline, 24 poly(vinylidene uoride), 25,26 Carboxylated nitrile rubber, 27 etc. 20-23 A lot of relevant studies have been carried out based on graphene in the matrix of polyaniline, 24 poly(vinylidene uoride), 25,26 Carboxylated nitrile rubber, 27 etc.…”

Section: Introductionmentioning

confidence: 99%

Preparation and properties of thermostable well-functionalized graphene oxide/polyimide composite films with high dielectric constant, low dielectric loss and high strength via in situ polymerization

et al. 2015

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This study proposes a novel and facile method to synthesize high-quality NH 2 -functionalized and carboxylfunctionalized graphene oxide (PPD-CFGO)/polyimide (PI) composite films with high dielectric constant (3), low dielectric loss, high-temperature resistance and outstanding mechanical properties by in situ polymerization. In addition to the partial carboxyl groups located at the edges, the ample hydroxyl and epoxy groups bonded on the basal plane of graphene sheets were exploited to covalently bond to the amines. GO was modified by oxalic acid to obtain carboxyl-functionalized GO (CFGO) before amidation.NH 2 -functionalized CFGO (PPD-CFGO), dispersing well in dimethylacetamide (DMAc), was the initial platform for polymer grafting to improve the CFGO dispersion in the polymer matrix. Partially reduced graphene nanosheets are formed during the imidization process. The PPD-CFGO/PI composite films exhibit high tensile strength (up to 848 MPa) and Young's modulus (18.5 GPa). The thermogravimetric analysis results indicate that the PPD-CFGO/PI composites have good thermal stability below 500 C.The dielectric constant increases up to 36.9 with an increasing amount of PPD-CFGO, higher than that of the pure PI polymer by a factor of 12.5, while the dielectric loss is only 0.0075 and the breakdown strength still remains at a high level (132.5 AE 9.3 MV m À1 ).

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Porous graphene sandwich/poly(vinylidene fluoride) composites with high dielectric properties

Cited by 81 publications

References 32 publications

Achieving significantly enhanced dielectric performance of reduced graphene oxide/polymer composite by covalent modification of graphene oxide surface

Achieving significantly enhanced dielectric performance of reduced graphene oxide/polymer composite by covalent modification of graphene oxide surface

Simultaneously improved actuated performance and mechanical strength of silicone elastomer by reduced graphene oxide encapsulated silicon dioxide

Preparation and properties of thermostable well-functionalized graphene oxide/polyimide composite films with high dielectric constant, low dielectric loss and high strength via in situ polymerization

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