Core-shell structured poly(methyl methacrylate)/BaTiO3 nanocomposites prepared by in situ atom transfer radical polymerization: a route to high dielectric constant materials with the inherent low loss of the base polymer

Xie, Liyuan; Huang, Xingyi; Wu, Chao; Jiang, Pingkai

doi:10.1039/c0jm04574h

Cited by 357 publications

(234 citation statements)

References 59 publications

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“…2b). The presence of absorption bands at 1114 cm -1 (Si-O-particle) and 1061 cm -1 (Si-O-Si group) suggested that the silane was successfully introduced onto the surface of BTO [18]. In comparison with BTO-RAFT, the spectrum of BTO-g-PSt existed bands at 2836 -3079 cm -1 and 1453 -1601 cm -1 , which ascribed to the stretching vibration absorptions of C-H and C=C in PSt (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…2a) possesses broad band at 3400 cm −1 which is assigned to the -OH stretching vibration. BTO has been reported to present absorption bands at 1467 and 596 cm −1 , which represent the stretching vibration of -CO 3 2-from the residual BaCO 3 and the vibration mode of a metal-dioxo bridge, respectively [18]. The chemical bond of RAFT agent on the surface of BTO exhibits absorption bands at 2836 and 2928 cm -1 which are assigned for CH 2 -moiety of RAFT agent and shows a weak but visible band at 3057 cm -1 assigning for sp 2 C-H stretching of aromatic ring (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Synthesis of S-benzyl S'-trimethoxysilylpropyltrithiocarbonate (RAFT agent) was performed as described elsewhere [17]. Surface hydroxylation of barium titanate (BTO-OH) was carried out following a literature procedure [18]. All of the above chemicals were purchased from Aldrich, Korea.…”

Section: Methodsmentioning

confidence: 99%

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High fluorescence emission of carboxylic acid functionalized polystyrene/BaTiO3 nanocomposites and rare earth metal complexes: Preparation and characterization

Cao¹,

Showkat²,

Wang³

et al. 2015

AIP Conference Proceedings

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Abstract. Noble fluorescence nanocomposite compound based on barium titanate nanoparticles (BTO), polystyrene (PSt), and terbium ion (Tb 3+ ) was synthesized by a combination of surfaceinitiated reversible addition-fragmentation chain transfer (RAFT) polymerization, Friedel-Crafts alkylation reaction and coordinate chemistry. Initially, a modification of surface of BTO was conducted by an exchange process with S-benzyl S'-trimethoxysilylpropyltrithiocarbonate to create macro-initiator for polymerization of styrene. Subsequently, aryl carboxylic acid functionalized polystyrene grafted barium titanate (BTO-g-PSt-COOH) was generated by substitution reaction between 4-(Chloromethyl) benzoic acid and PSt chains. The coordination of the nanohybrids with Tb 3+ ions afforded fluorescent Tb 3+ tagged aryl carboxylic acid functionalized polystyrene grafted barium titanate (BTO-g-PSt-Tb 3+ ) complexes. Structure, morphology, and fluorescence properties of nanohybrid complexes were investigated by respective physical and spectral studies. FT-IR and SEM analyses confirmed the formation of BTO-g-PSt-Tb 3+ nanohybrids. Furthermore, TGA profiles demonstrated the grafting of aryl carboxylic acid functionalized polystyrene on BTO surface. Optical properties of BTO-g-PSt-Tb 3+ complexes were investigated by fluorescence spectroscopy.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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High fluorescence emission of carboxylic acid functionalized polystyrene/BaTiO3 nanocomposites and rare earth metal complexes: Preparation and characterization

Cao¹,

Showkat²,

Wang³

et al. 2015

AIP Conference Proceedings

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“…Unfortunately, the loss tangent of the system increases simultaneously due to the incompatibility between the organic substrate and the inorganic additives. As a result, the micromorphology of fillers, the distribution mode of the additives in the polymeric substrate, surface treatment, and preparation methods of the fillers (i.e., "core-shell" nanoarchitectures) [43][44][45][46] are equal important as the kind of fillers that determines the properties of the obtained composites [47][48][49][50][51]. This article reviews the progress of PEN-based composites exhibiting high-k for electric applications.…”

Section: Introductionmentioning

confidence: 99%

Polyarylene Ether Nitrile-Based High-k Composites for Dielectric Applications

Zhan

Wang

et al. 2018

International Journal of Polymer Science

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Flexible polymer-based composites exhibiting high dielectric constant as well as low dielectric loss have been intensively investigated for their potential utilization in electronics and electricity industry and energy storage. Resulting from the polar -CN on the side chain, polyarylene ether nitrile (PEN) shows relatively high dielectric constant which has been extensively investigated as one of the hot spots as dielectric materials. However, the dielectric constant of PEN is still much lower than the ceramic dielectrics such as BaTiO 3 , TiO 2 , and Al 2 O 3 . In this review, recent and in-progress advancements in the designing and preparing strategies to obtain high-k PEN-based nanocomposites are summarized. According to the types of the added fillers, the effects of organic fillers, dielectric ceramic fillers, and conductive fillers on electric properties of PEN-based composites are investigated. In addition, other factors including the structures and sizes of the additive, the compatibility between the additive agent and the PEN, and the interface which affects the dielectric properties of the obtained composite materials are investigated. Finally, challenges facing in the design of more effective strategies for the high-k PEN-based dielectric materials are discussed.

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“…[31][32][33][34] Within the past decade, CNTs have gained great attention worldwide owing to their special structure and properties. More interestingly, with the addition of an extremely small content of CNTs to a polymer, the dielectric constant will be greatly increased, suggesting that CNT/polymer composites generally have an extremely low percolation threshold.…”

Section: Introductionmentioning

confidence: 99%

Study of low weight percentage filler on dielectric properties of MCWNT-epoxy nanocomposites

Trihotri

Dwivedi²,

Malik

et al. 2016

J. Adv. Dielect.

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An attempt is made to study the effect of low weight percentage multiwall carbon nanotube (MWCNT) powder on dielectric properties of MWCNT reinforced epoxy composites. For that MWCNT (of different low weight percentage) reinforced epoxy composite was prepared by dispersing the MWCNT in resin. Samples were prepared by solution casting process and characterized for their dielectric properties such as dielectric constant (" 0 ), dielectric dissipation factor (tan ) and AC conductivity ( ac ). The main objective is the investigation of the dielectric properties of the prepared samples at the low weight percentage of the filler at different temperatures and frequencies. From the two mechanisms of electrical conduction, first the leakage current obtained by the formation of a percolation network in the matrix and the other by tunneling of electrons formed among conductors nearby (tunneling current); here we are getting conduction by the second mechanism. Generally, leakage current makes more contribution to conductivity than tunneling current. Dielectric dissipation factor at 250 Hz frequency is greater than all other frequencies and starts increasing from 60 C. The peak height of the transition temperature decreases with increasing frequency. This study shows that the addition of a low weight percentage of MWCNT can modify considerably the electrical behavior of epoxy nanocomposites without chemical functionalization of filler.

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Core-shell structured poly(methyl methacrylate)/BaTiO3 nanocomposites prepared by in situ atom transfer radical polymerization: a route to high dielectric constant materials with the inherent low loss of the base polymer

Cited by 357 publications

References 59 publications

High fluorescence emission of carboxylic acid functionalized polystyrene/BaTiO3 nanocomposites and rare earth metal complexes: Preparation and characterization

High fluorescence emission of carboxylic acid functionalized polystyrene/BaTiO3 nanocomposites and rare earth metal complexes: Preparation and characterization

Polyarylene Ether Nitrile-Based High-k Composites for Dielectric Applications

Study of low weight percentage filler on dielectric properties of MCWNT-epoxy nanocomposites

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