Novel PTFE/CNT composite nanofiber membranes with enhanced mechanical, crystalline, conductive, and dielectric properties fabricated by emulsion electrospinning and sintering

Huang, An; Liu, Fan; Cui, Zhixiang; Wang, Haokun; Song, Xin-Chen; Geng, Lihong; Wang, Hankun; Peng, Xiangfang

doi:10.1016/j.compscitech.2021.108980

Cited by 58 publications

(40 citation statements)

References 55 publications

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“…The σ of ESO/Si747@BTO/ENR composites gradually decreased as the content of ESO rose ( Figure 8 a). The decreased σ was ascribed to the addition of ESO, which effectively decreased the volume fraction of BTO nanoparticles in the ENR matrix and destroyed the filler network in the ENR composites [ 17 ]. Meanwhile, the E b of ENR composites rose with the ESO content.…”

Section: Resultsmentioning

confidence: 99%

“…Previous studies suggested that adding conductive fillers (such as silver (Ag), carbon nanotubes (CNTs), graphene oxide, and polyaniline) or high- ε r ceramic particles (such as barium titanate (BTO), calcium copper titanate (CCTO), and titanium dioxide (TiO 2 )) into polymeric matrices may improve the ε r of polymeric composites [ 15 , 16 ]. Huang et al [ 17 ] prepared high- ε r polytetrafluoroethylene/carbon nanotube (PTFE/CNT) nanofiber membranes via the electrostatic spinning method and high-temperature sintering. The ε r of the resulting PTFE/CNT nanofiber membrane reached 58.46 at 100 Hz when filled with 5 wt% CNTs.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced Actuation Performance of Polymeric Composites by Simultaneously Incorporating Covalent-Bond-Functionalized Dielectric Nanoparticles and Polar Plasticizer

Yang

2022

Polymers

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Dielectric elastomer actuators (DEAs), similar to artificial muscles, are widely applied in the fields of robotics and biomedical devices. In this work, 3-mercaptopropyl ethyoxyl di(tridecyl-pentaethoxy) silane (Si747)-modified BaTiO3 (BTO) nanoparticles (denoted as Si747@BTO) were utilized as dielectric filler to improve the dielectric constant while epoxy soybean oil (ESO) was employed as a plasticizer to decrease the elastic modulus, with the aim of improving the actuation performance of epoxy natural rubber (ENR) composites. The participation of Si747 in the vulcanization reaction of ENR led to the formation of covalent bonds between BTO and ENR chains, resulting in a uniform dispersion of BTO nanoparticles in the ENR matrix. Among obtained composites, the 50 phr ESO/Si747@BTO/ENR exhibited a relatively high actuated strain of 8.89% at 22 kV/mm, which is a value about 5.1-fold higher than that of pure ENR (1.45%) under the same electric field.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Enhanced Actuation Performance of Polymeric Composites by Simultaneously Incorporating Covalent-Bond-Functionalized Dielectric Nanoparticles and Polar Plasticizer

Yang

2022

Polymers

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“…The synergistic effect of carbon-based materials and conductive polymers in nanofiber composites has recently been shown to intensify the permeability of nanofiber membranes and reduce electric loss and flexibility. 49 Therefore, graphene oxide nanofiber composites from graphite and PAN are promising materials to improve dielectric properties and flexibility. In this research, graphene oxide/PAN composite fibers were produced with varying graphene oxide content.…”

Section: Introductionmentioning

confidence: 99%

“…The performance of graphene oxide from graphite can be increased by incorporating it into PAN nanofiber composites. The synergistic effect of carbon-based materials and conductive polymers in nanofiber composites has recently been shown to intensify the permeability of nanofiber membranes and reduce electric loss and flexibility . Therefore, graphene oxide nanofiber composites from graphite and PAN are promising materials to improve dielectric properties and flexibility.…”

Section: Introductionmentioning

confidence: 99%

Dielectric Properties and Flexibility of Polyacrylonitrile/Graphene Oxide Composite Nanofibers

et al. 2022

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Energy storage and modern electronics industries are in essential need of high dielectric and highly flexible materials. In this study, polyacrylonitrile and reduced graphene oxide (PAN/GO) were prepared by electrospinning. The composite morphology produced a homogeneous, smooth, and flexible surface with high tensile strength and durability. The diameter of the fibers in the composite mats ranged from 232 to 592 nm. The X-ray diffraction pattern recording displayed a sharp peak characteristic centered between 20 and 30° angles with a maximum degree of crystallinity of 86.23%. The evaluation of the Fourier-transform infrared spectrum indicated the interaction between GO and PAN through hydrogen bonds. The differential scanning calorimetry measurements confirmed that GO acted as a nucleating agent that improves the thermal stability of the composite. The dielectric properties exhibited the relative permittivity of the composite of 86.4 with a dielectric loss (tan δ) of 4.97 at 10 2 Hz, and the maximum conductivity was achieved at 34.9 × 10 –6 Sm –1 at high frequencies.

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“…A methylsilsesquioxane aerogel coating layer fabricated on ePTFE thin film was described by Xingzhong Guo, the flexible and lightweight material prepared via a simple blade coating process showed good dielectric property and electrical insulation property [ 22 ]. Although these studies have successfully incorporated aerogels with PTFE, the involved fabrication methods bring about high energy consuming and environmental pollution problems since the casting of PTFE materials is mostly conducted by a molding technique [ 23 ]. Moreover, it is challenging to create a desirable continuous aerogel/PTFE layer for applications when light weight and miniaturization are essential.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Electrosprayed Aerogel/Polytetrafluoroethylene Microporous Materials

et al. 2021

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This paper presents the preparation of aerogel/polytetrafluoroethylene (PTFE) microporous materials via needleless electrospray technique, by using an aqueous dispersion of polytetrafluoroethylene as the basic spinning liquid. Different contents of aerogel powders were applied to the spinning liquid for electrospraying to investigate the effect on the structural characteristics and various properties of the materials. Cross-section, surface morphology, and particle size distribution of the electrosprayed materials were examined. Surface roughness, hydrophobicity, and thermal conductivity were evaluated and discussed. The results showed that the electrosprayed aerogel/PTFE layers were compact and disordered stacking structures composed of spherical particles with a rough surface. As the aerogel content increased, the electrosprayed materials demonstrated increased surface roughness and improved surface hydrophobicity with a contact angle up to 147.88°. In addition, the successful achievement of thermal conductivity as low as 0.024 (W m−1 K−1) indicated a superior ability of the prepared aerogel/PTFE composites to prevent heat transfer. This study contributes to the field of development of aerogel/PTFE composites via electrospray technique, providing enhanced final performance for potential use as thermal and moisture barriers in textiles or electronic devices.

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Novel PTFE/CNT composite nanofiber membranes with enhanced mechanical, crystalline, conductive, and dielectric properties fabricated by emulsion electrospinning and sintering

Cited by 58 publications

References 55 publications

Enhanced Actuation Performance of Polymeric Composites by Simultaneously Incorporating Covalent-Bond-Functionalized Dielectric Nanoparticles and Polar Plasticizer

Enhanced Actuation Performance of Polymeric Composites by Simultaneously Incorporating Covalent-Bond-Functionalized Dielectric Nanoparticles and Polar Plasticizer

Dielectric Properties and Flexibility of Polyacrylonitrile/Graphene Oxide Composite Nanofibers

Preparation and Characterization of Electrosprayed Aerogel/Polytetrafluoroethylene Microporous Materials

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