Effect of surface modification on the dielectric properties of PEN nanocomposites based on double-layer core/shell-structured BaTiO3 nanoparticles

Tang, Hailong; Ma, Zhen; Zhong, Jiachun; Yang, Jian; Zhao, Rui; Liu, Xiaobo

doi:10.1016/j.colsurfa.2011.04.007

Cited by 68 publications

(40 citation statements)

References 31 publications

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“…It can be noted that there are slightly decrease in the thermal stability of the nanocomposite films with the increase of HBCuPc-g-CNTs content. Therefore, it can be inferred that the slight decrease in the thermal stability of the nanocomposite films with the increase of HBCuPc-g-CNTs loading might be due to the decomposition of the phthalocyanine on the surface CNTs, which is consistent with the results of our previous work [31]. Nevertheless, such thermal properties also make them very attractive for the composites to use at elevated temperatures and aggressive chemical environments.…”

Section: Thermal Properties Of Pen/hbcupc-g-cnts Nanocomposite Filmssupporting

confidence: 79%

Covalent grafting of a-CNTs on copper phthalocyanine for the preparation of PEN nanocomposites with high dielectric constant and high thermal stability

Jia

Liu

2015

J Mater Sci: Mater Electron

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Functionalization of carbon nanotubes (CNTs)is considered as an essential step to enable their manipulation and application in potential end-use products. In this paper, novel ternary dielectric polymer-based nanocomposite films, consisting of hyperbranched copper phthalocyanine grafted carbon nanotubes and polyarylene ether nitriles (PEN/HBCuPc-g-CNTs), were prepared via solution-casting method. The CNTs are enwrapped by a functional intermediate HBCuPc thick layer and formed rough shell on the surface of CNTs to ensure a good dispersion of CNTs in PEN matrix and suppress the mobility of free charge carriers effectively, resulting in significant improvement of the dielectric properties of PEN/HBCuPc-g-CNTs nanocomposite films in contrast to PEN/CNTs. Furthermore, around 38 wt% of phthalocyanine oligomer based on the total weight of the CNTs can be covalently grafted to the surface of the CNTs. Compared with raw CNTs, grafted CNTs showed better dispersion and stronger interfacial adhesion to PEN matrix. SEM images showed that HBCuPc-CNT was perfectly embedded in the matrix and no pullout phenomenon could be observed, thus resulting in significant improvement of the mechanical and thermal properties of PEN/HBCuPcg-CNTs nanocomposite films compared to pure PEN films. For 2.0 wt% HBCuPc-g-CNTs reinforced PEN nanocomposite films, the tensile strength and T g were increased by 24.5 % and 5°C, respectively, in comparison with those of pure PEN.

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Section: Thermal Properties Of Pen/hbcupc-g-cnts Nanocomposite Filmssupporting

confidence: 79%

Covalent grafting of a-CNTs on copper phthalocyanine for the preparation of PEN nanocomposites with high dielectric constant and high thermal stability

Jia

Liu

2015

J Mater Sci: Mater Electron

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“…Unfortunately, carbon nanotubes have a trend of spontaneous aggregation because of their large surface area and high surface energy, which further limits their use [15][16][17]. Therefore, it is very important for uniformly dispersing MWCNTs in the polymer matrix [18,19], various techniques, such as (1) high-power ultrasonication, (2) functionalization of carbon nanotubes, were greatly utilized to improve the physical properties of polymer matrix. Consequently, various properties of the MWCNTs/polymer nanocomposites were obviously improved.…”

Section: Introductionmentioning

confidence: 99%

Effect of multiwalled carbon nanotubes on the crystallization and dielectric properties of BP-PEN nanocomposites

Zheng

Yang

et al. 2014

J Mater Sci: Mater Electron

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In this work, polymer-based nanocomposite films formed from biphenol poly(arylene ether nitrile) (BP-PEN) and multiwalled carbon nanotubes (MWCNTs) were successfully prepared by the solution casting method combined with continuous ultrasonic dispersion technology. The micromorphology, thermal, mechanical and dielectric properties of the nanocomposite films were investigated in detail. Non-isothermal crystallization behavior studies indicate that the presence of MWCNTs enhances the crystallization of BP-PEN in the nanocomposites, which is consistent with the XRD analysis. Most importantly, it could be observed that the film containing 0.8 wt% MWCNTs reached the maximum crystallinity. Although, incorporation of MWCNTs did not obviously increase the mechanical of the films, all the nanocomposite films still exhibited excellent mechanical strength. The SEM micrographs of the nanocomposite films showed that the MWCNTs were uniformly coated by BP-PEN crystals, and indicating significantly improved nucleation ability of MWCNTs for polymer crystallization.

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“…In fact, the increase of dielectric permittivity in nanocomposites has been widely reported and may also be understood by a microcapacitor networks model [28][29][30]. The decorated CNTs can be considered as microcapacitors in the nanocomposites.…”

Section: Dielectric Properties Of Pen and Pen/cpen-f-cnts Nanocompositesmentioning

confidence: 97%

Effect of surface functionalization on the properties (rheological, mechanical, and dielectric) and microtopography of PEN/CPEN-f-CNTs nanocomposites

Zheng

Jia

et al. 2015

Polym. Compos.

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Novel carboxylic poly(arylene ether nitrile)s (CPEN) functionalized carbon nanotubes (CPEN-f-CNTs) were successfully prepared by a simple and effective solvent-thermal route. The CPEN-f-CNTs were subsequently used as the novel filler for preparation of high performance poly(arylene ether nitrile)s (PEN) nanocomposites. The SEM characterization of the PEN nanocomposites revealed that the CPEN-f-CNTs present better dispersion and interfacial compatibility in the PEN matrix, which was confirmed by the linear rheological analysis (Cole-Cole plots) as well. Consequently, the improved thermal stability (increased initial and maximum decomposition temperature) and enhanced mechanical properties (tensile strength and modulus) were obtained from nanocomposites using CPEN-f-CNTs. More importantly, the PEN/CPEN-f-CNTs nanocomposites not only show a high dielectric constant but also have low dielectric loss. For example, a dielectric constant of 39.7 and a dielectric loss of 0.076 were observed in the PEN composite with 5 wt%

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Effect of surface modification on the dielectric properties of PEN nanocomposites based on double-layer core/shell-structured BaTiO3 nanoparticles

Cited by 68 publications

References 31 publications

Covalent grafting of a-CNTs on copper phthalocyanine for the preparation of PEN nanocomposites with high dielectric constant and high thermal stability

Covalent grafting of a-CNTs on copper phthalocyanine for the preparation of PEN nanocomposites with high dielectric constant and high thermal stability

Effect of multiwalled carbon nanotubes on the crystallization and dielectric properties of BP-PEN nanocomposites

Effect of surface functionalization on the properties (rheological, mechanical, and dielectric) and microtopography of PEN/CPEN-f-CNTs nanocomposites

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