Nanoscale mechanical and electrical characterization of the interphase in polyimide/silicon nitride nanocomposites

Houssat, Mohammed; Villeneuve-Faure, Christina; Dignat, Nadine Lahoud

doi:10.1088/1361-6528/ac13ea

Cited by 14 publications

(12 citation statements)

References 73 publications

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“…The interface is presumed with a width of tens of nanometers. To explain the excellent performance of PNDs, the interface has been considered to be of unique features such as modified permittivity and local states for charge trapping. , In recent years, with the use of EFM, these hypotheses can be checked directly by experiments. ,− For example, Sharma et al used EFM to investigate the charge density and permittivity in the interface . With a time-resolved EFM, Chen et al revealed that the interface near the PS–COOH nanoparticles exhibits greater polarization than that near the PS nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

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Insight into the Experimental Error in the Mapping of Electrical Properties with Electrostatic Force Microscopy

et al. 2022

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Electrostatic force microscopy (EFM) is an emergent, powerful technique for nanoscale detection of electrical properties such as permittivity and charge distribution. However, the surface irregularity of samples has been unfortunately overlooked in most EFM studies. Herein, we use a polymer nanocomposite dielectric (PND) as the showcase and demonstrate that the morphological discontinuity at the matrix/particle interface can lead to major discrepancies or even incorrect results in the EFM study. First, the influence of the morphology, permittivity, and charge density of the interface is quantitively analyzed with a numerical method, proving that linking EFM results directly to sample properties is impracticable in the research based on classical interface configuration. Then, two methods are proposed to address the issue. The first method is numerical inversion, which takes heterogeneous materials and irregular surfaces into consideration. In this method, the influence of several experimental uncertainties, such as the radius of the nanoparticle and the permittivity of the matrix, is estimated. It is shown that the uncertainties related to geometry have a great impact on inversion and should be determined preferentially. In the second method, two standard configurations of the interface are recommended and compared for the interface study to bypass the morphological issue. This work provides quantitative results regarding the longoverlooked error in the EFM detection of the microregion with heterogeneous composition and surface irregularities and offers methods to tackle this issue.

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Section: Introductionmentioning

confidence: 99%

“…The EFM seems to provide a promising approach to learning the interface in PNDs, but divergence in interpreting the EFM results arises and draws our attention. Namely, the influence from morphology is inadequately discussed ,, or even ignored ,,,,,− in most studies.…”

Section: Introductionmentioning

confidence: 99%

Insight into the Experimental Error in the Mapping of Electrical Properties with Electrostatic Force Microscopy

et al. 2022

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“…Considering the interphase width of 82 nm, the phase shift parameter of −0.08 ± 0.01 °/V² measured over the BN nanoparticle and its interphase leads to a relative dielectric permittivity of the interphase of 1.4 ± 0.2. An interphase area with a lower dielectric permittivity than matrix one has already been observed for various nanocomposites, particularly for polyethylene based one, such as PE/TiO2 [11], PE/Al2O3 [12], or polyimide/Si3N4 [10]. Results published in [11] on PE/TiO2 NC have shown practically the same value of the interphase permittivity (εri = 1.6).…”

Section: B Interphase Thickness Measurement By Pf-qnmmentioning

confidence: 64%

Impact of the interphase dielectric properties on the electric field distribution in LDPE/BN nanocomposites

Villeneuve-Faure

Dignat

Lantin

et al. 2022

2022 IEEE 4th International Conference on Dielectrics (ICD)

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Designing a new electrical insulating nanocomposite with chosen nanoparticles and matrix while targeting specific dielectric properties is still the Holy Grail in the domain of electrical engineering. The main challenge remains to understand the physical processes at the interphase between the nanoparticle and the matrix, at the nanoscale, and the impact of this interphase on the nanocomposite behavior at the macroscale. An interphase properties investigation has been developed, combining wellcontrolled low density polyethylene (LDPE)/ boron nitride (BN) nanoparticles films, and dielectric properties characterizations at the nanoscale. To do so, two derived modes of the Atomic Force Microscopy (AFM) are used. Peak Force Quantitative Nanomechanical Microscopy (PF-QNM) allows obtaining the interphase width, while Electrostatic Force Microscopy (EFM) measurements allow deducing the interphase relative permittivity. Based on these investigations, an electrostatic 3D model is then proposed to account for interphase properties at the microscopic scale, and to overcome the bridge between nanoscale and macroscale measurements.

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“…Secondly, a major role was attributed to the interphase and the interaction zone between the NBT nanowires and the PVDF matrix. For ferroelectric nanocomposite, the interphase of the dielectric permittivity is higher than that of the matrix because of the polarization enhancement in the interphase [ 4 , 50 , 51 , 52 ]. As the loading of NBT nanofibers increases, it is inevitable to introduce a small number of defects.…”

Section: Resultsmentioning

confidence: 99%

Electrospinning Synthesis of Na0.5Bi0.5TiO3 Nanofibers for Dielectric Capacitors in Energy Storage Application

et al. 2022

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Dielectric composites based on ferroelectric ceramics nanofibers are attracting increasing attention in capacitor application. In this work, the sol–gel method and electrospinning technology are utilized to prepare one-dimensional Na0.5Bi0.5TiO3 (NBT) nanofibers, and the influence of electrospinning process parameters such as spinning voltage, liquid supply rate, and collector speed on the morphology and structure of nanofibers are systematically explored. The final optimized parameters include the applied voltage of 20 kV, the solution flow rate of 1 mL/h, and the collector’s rotation speed of 1500 rpm. The optimized NBT nanofibers are introduced into the PVDF polymer matrix for energy storage application. Owing to the enhanced interfacial polarization between PVDF matrix and NBT nanofibers with a high aspect ratio, the NBT–PVDF nanocomposites achieve a high discharge energy density of 14.59 J cm−3 and an energy efficiency of 53.69% at 490 kV mm−1, which are higher than those of pure PVDF, i.e., 10.26 J cm−3 and 48.17% at 420 kV mm−1, respectively. The results demonstrate that the strategy of synthesizing NBT nanofibers using the electrospinning method is of great potential for high-performance dielectric capacitor application.

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Nanoscale mechanical and electrical characterization of the interphase in polyimide/silicon nitride nanocomposites

Cited by 14 publications

References 73 publications

Insight into the Experimental Error in the Mapping of Electrical Properties with Electrostatic Force Microscopy

Insight into the Experimental Error in the Mapping of Electrical Properties with Electrostatic Force Microscopy

Impact of the interphase dielectric properties on the electric field distribution in LDPE/BN nanocomposites

Electrospinning Synthesis of Na0.5Bi0.5TiO3 Nanofibers for Dielectric Capacitors in Energy Storage Application

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