Prediction of the effective dielectric constant in SWNT polyimide nanocomposites using the Bruggemann model

Pérez, Ricardo

doi:10.1002/app.30242

Cited by 8 publications

(5 citation statements)

References 31 publications

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“…However, the dielectric permittivity at low frequencies (1 and 10 2 Hz) enhances significantly only when f MWNT approaches the percolation threshold, which is largely from the interaction between PVDF and MWNT because of the two facts below. i) The enhanced dielectric permittivity (3800 at 1 Hz) of composite is larger than PVDF matrix (about 10) , and carbon nanotube (about 2000) alone. It suggests that a synergetic effect occurs between macromolecules and carbon nanotube fillers, especially when the low MWNT content (12 vol %) is taken into account.…”

Section: Resultsmentioning

confidence: 98%

Giant Dielectric Permittivity Nanocomposites: Realizing True Potential of Pristine Carbon Nanotubes in Polyvinylidene Fluoride Matrix through an Enhanced Interfacial Interaction

et al. 2011

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Section: Resultsmentioning

confidence: 98%

Giant Dielectric Permittivity Nanocomposites: Realizing True Potential of Pristine Carbon Nanotubes in Polyvinylidene Fluoride Matrix through an Enhanced Interfacial Interaction

et al. 2011

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“…This behavior clearly indicates that the effect of interfacial polarization becomes more predominant at lower frequency. The decrease in permittivity and loss factor with the increase in frequency can be also explained by the fact that at high frequencies electric field changes too fast for the polarization effects to appear (Figure 7B) 36–46…”

Section: Resultsmentioning

confidence: 99%

Tailored dielectric and mechanical properties of noncovalently functionalized carbon nanotube/poly(styrene‐b‐(ethylene‐co‐butylene)‐b‐styrene) nanocomposites

Yadav

Mahapatra

Cho

2013

J of Applied Polymer Sci

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The preparation of high‐dielectric poly(styrene‐b‐(ethylene‐co‐butylene)‐b‐styrene) (SEBS) composites containing functionalized single‐walled carbon nanotubes (f‐SWCNTs) noncovalently appended with dibutyltindilaurate are reported herein. Transmission electron microscopy and X‐ray photoelectron and Raman spectroscopy confirmed the noncovalent functionalization of the SWCNTs. The SEBS‐f‐SWCNT composites exhibited enhanced mechanical properties as well as a stable and high dielectric constant of approximately 1000 at 1 Hz with rather low dielectric loss at 2 wt% filler content. The significantly enhanced dielectric property originates from the noncovalent functionalization of the SWCNTs that ensures good dispersion of the f‐SWCNTs in the polymer matrix. The f‐SWCNTs also acted as a reinforcing filler, thereby enhancing the mechanical properties of the composites. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

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“…Aromatic PI has served as martrix for composites due to an excellent combination of thermal stablility and mechanical property . The superior properties of CNTs composing entirely sp 2 carboncarbon bonds have sparked interests in the promising application of fier reinforced composite materials for improving mechanical, electric and thermal properties .…”

Section: Introductionmentioning

confidence: 99%

A comparative study on effect of aromatic polyimide chain conformation on reinforcement of carbon nanotube/polyimide nanocomposites

Zhang

Chakoli

Zang

et al. 2014

J of Applied Polymer Sci

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Two kinds of polyimides (PIs) were selected as matrices for multiwalled carbon nanotubes (CNTs)-based nanocomposites. The two PIs were initially synthesized through reactions of a same benzoxazole-containing diamine with two different dianhydrids. A linear PI was formed from the ether bond-containing dianhydride, while a nonlinear PI was formed from the AC(CF3) 22 groups containing dianhydride. Optimized dispersion of nanotubes in both kinds of PIs was found to be at a concentration with 0.5 wt % COOH-CNT, where great enhancement was achieved for both PIs. It was also found that introducing nanotubes into PI matrices aroused more significant increase of Young's modulus and break stress in linear PI than that in nonlinear PI. To determine the key parameters involved in design of PIs for maximum reinforcement efficiency using CNT as the nanofiller, the nanoscopic dispersion state of the nanotubes in diamine solution and their reaction were investigated via morphological and spectroscopic studies. The interfacial interactions between nanotubes and two PI chains were characterized by FT-IR and Raman spectroscopy. The fracture surface characteristics of two series of CNT/PI nanocomposites were further investigated using SEM. Our findings show that the diamine plays a double role for the in-situ polymerization, a dispersant to disentangle the CNT agglomerates and a monomer for PI synthesis with dianhydrides. It was also found that geometry and flexibility of PI chains are crucial to determine the interfacial interactions between nanotubes and PI chains. For elucidating the different interfacial characteristics of the two PIs on the surface of CNT, we proposed a model for preferred conformation adopted by a single PI chain on a single CNT. V C 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40479.

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Prediction of the effective dielectric constant in SWNT polyimide nanocomposites using the Bruggemann model

Cited by 8 publications

References 31 publications

Giant Dielectric Permittivity Nanocomposites: Realizing True Potential of Pristine Carbon Nanotubes in Polyvinylidene Fluoride Matrix through an Enhanced Interfacial Interaction

Giant Dielectric Permittivity Nanocomposites: Realizing True Potential of Pristine Carbon Nanotubes in Polyvinylidene Fluoride Matrix through an Enhanced Interfacial Interaction

Tailored dielectric and mechanical properties of noncovalently functionalized carbon nanotube/poly(styrene‐b‐(ethylene‐co‐butylene)‐b‐styrene) nanocomposites

A comparative study on effect of aromatic polyimide chain conformation on reinforcement of carbon nanotube/polyimide nanocomposites

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