Negative Permittivity Behavior in Flexible Carbon Nanofibers- Polydimethylsiloxane Films

Wu, Haikun; Sun, Huimin; Han, Fengjin; Xie, Peitao; Zhong, Yiming; Quan, Bin; Zhao, Yanan; Liu, Chun-Zhao; Fan, Runhua; Guo, Zhanhu

doi:10.30919/es8d576

Cited by 39 publications

(27 citation statements)

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“…In other words, when MWCNTs content was increased to 20 wt%, some MWCNTs started to form network while other MWCNTs insulated by the PS matrix could still form the micro-capacitors, hence, the number of equivalent micro-capacitors decreased and the micro-capacitors effect was weakened, leading to the decrease of ɛ′. [45,46] The real permittivity as a function of the MWCNTs content at 1 MHz was shown in Figure 4b. It was observed that the ɛ′ firstly increased with increasing MWCNTs content from 2 to 15 wt%, and high ɛ′ value was achieved due to enhanced microcapacitors effect.…”

Section: Dielectric Properties Of Ps/mwcnts Filmsmentioning

confidence: 99%

Flexible and biocompatible polystyrene/multi-walled carbon nanotubes films with high permittivity and low loss

Wang¹

2022

ES Mater. Manuf.

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Percolative composites with high permittivity and low loss have drawn enormous attention in the research community, exhibiting wide range of applications in sensors, capacitors, field-effect transistors, antennas, etc. In this work, flexible and biocompatible polystyrene/multi-walled carbon nanotubes (PS/MWCNTs) films with high permittivity and low loss near percolation threshold were achieved by solution mixing assisted with non-solvent induced phase separation (NIPS) strategy and followed by the hot press method. Cytotoxicity experiments proved that the experimental process and products are green, environmentally friendly and biocompatible. The microstructure and dielectric properties were investigated. When MWCNTs content reached 15 wt%, high permittivity and low loss were simultaneously realized. Combining the flexibility and non-toxicity, the PS/MWCNTs films with high permittivity and low loss exhibit great potentials in wearable devices, skin sensors and flexible electronics.

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Section: Dielectric Properties Of Ps/mwcnts Filmsmentioning

confidence: 99%

Flexible and biocompatible polystyrene/multi-walled carbon nanotubes films with high permittivity and low loss

Wang¹

2022

ES Mater. Manuf.

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“…[29,30] These studies demonstrate that use of carbon nanomaterials especially MWCNT leads to significantly increase in properties and these properties were useful for various applications such as strain sensors [29,30] and flexible sensors. [31][32][33][34][35][36] Other studies use different type of nanofillers such as nickel, and antimony trioxide, silver micro-tube or MWCNT in different types of polymer composites such as PDMS and improved properties are reported. [37][38][39] These studies further show that such improved properties are useful for various applications such as EMI or strain sensing.…”

Section: Introductionmentioning

confidence: 99%

Stretchable piezo‐electric energy harvesting device with high durability using carbon nanomaterials with different structure and their synergism with molybdenum disulfide

Kumar

Manikkavel

Kumar

et al. 2022

Vinyl Additive Technology

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Recently, polymer composite based stretchable piezo‐electric energy harvesting device have attracted a great attention in composite industry. At laboratory scale, these piezo‐electric devices have ability to generate impressive voltage (~8 V) with high durability (>0.5 million cycles) depending upon nature of the material used in electrode and substrate. In this work, composites were prepared by mixing room temperature vulcanized silicone rubber (RTV‐SR) and nanofillers such as multi‐wall carbon nanotube (MWCNT), nano‐carbon black (nano‐CB), graphite nanoplatelets (GNP), in single or hybrid with molybdenum disulfide (MoS2). These fillers differentiate on basis of their structure ranging from 0‐dimensional (0‐D) to 3‐D. The effects of these structures on mechanical properties are demonstrated. Among them, MWCNT with 1‐D, tube shape morphology, high aspect ratio of 65 shows dominating mechanical properties even at 2 per hundred parts of rubber (phr) loading followed by nano‐CB, GNP at 8 phr and MoS2 at 2 phr. A synergistic effect in mechanical properties between hybrid fillers such as tensile strength and fracture strain was demonstrated. In the end, the composites were tested for piezo‐electric energy generation and durability cycles for the best candidate such as MWCNT was tested for up to 0.5 million cycles was demonstrated.

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“…At present, the use of conductive elastic composite hydrogels or poriferous sponges with suitable conductivity for flexible and wear‐resistant piezoresistive pressure sensors or other applications are attracted widespread attention 24–29 . Due to the excellent conductivity, the conductive hydrogels or sponges are considered as ideal pressure‐sensitive sensors 30 .…”

Section: Introductionmentioning

confidence: 99%

High strength and anti‐freezing piezoresistive pressure sensor based on a composite gel

Tie

Mao

Zhang

et al. 2022

Polymers for Advanced Techs

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Piezoresistive sensors constructed by functionalized elastic gel have received broad research by virtue of the visible advantages, such as low-cost, stability of signal collection, and excellent compress strain. Herein, a new method about improved in situ polymerization of pyrrole monomer coated on polyurethane (PU) sponge was developed, which endowed the sponge with high and homogeneous conductivity. Then, a

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Negative Permittivity Behavior in Flexible Carbon Nanofibers- Polydimethylsiloxane Films

Cited by 39 publications

References 0 publications

Flexible and biocompatible polystyrene/multi-walled carbon nanotubes films with high permittivity and low loss

Flexible and biocompatible polystyrene/multi-walled carbon nanotubes films with high permittivity and low loss

Stretchable piezo‐electric energy harvesting device with high durability using carbon nanomaterials with different structure and their synergism with molybdenum disulfide

High strength and anti‐freezing piezoresistive pressure sensor based on a composite gel

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