Highly stretchable dielectric nanocomposites based on single-walled carbon nanotube/ionic liquid gels

Oh, Kiwon; Lee, Jang Yeol; Lee, Sang Soo; Park, Min; Kim, Daeheum; Kim, Heesuk

doi:10.1016/j.compscitech.2013.04.004

Cited by 40 publications

(12 citation statements)

References 39 publications

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“…The two solutions are then homogenously mixed together by mechanical mixing, magnetic agitation, or high-energy sonication. Subsequently, the CNT-polymer composites can be obtained by either vaporizing the solvent or coagulation by adding a poor solvent [25,77,78]. This method is generally considered when a better dispersion and distribution of film-type composites are needed [10].…”

Section: Mixing Of Cnt With Elastomeric Polymermentioning

confidence: 99%

“…Thus, the multipurpose nature of rubber-CNT-based nanocomposites makes them potential candidates for widespread applications in various fields. The characteristic features of flexibility, stretchability, conductivity and robustness of rubber-CNT nanocomposites brands them highly applicable in pressure, and strain sensors [47,71,90], super-capacitors, and charge-storage capacitors [38,41,77], thermally stable and electrical cable materials [60,92], oil/fuel hoses and gaskets [105], and Figure 14. TGA thermograms (a) and corresponding DTG curve (b) of pure silicone rubber (SR) and SR/MWCNTs nanocomposites [140].…”

Section: Applicationsmentioning

confidence: 99%

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Carbon nanotube-reinforced elastomeric nanocomposites: a review

Mensah

Kim

Lee

et al. 2015

International Journal of Smart and Nano Materials

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This review is focused on carbon nanotube (CNT)-elastomeric polymer nanocomposites, which have attracted industrial and academic interest over the years due to their enhanced properties. Major factors notably CNT type, surface modification, dispersion of CNT, and processing techniques that affect the physical properties of CNT-elastomeric polymer nanocomposites are reviewed, and several key physical properties, including tensile, electrical, and thermal properties, were also included in this review. Some of the key challenges that undermine the effectiveness of CNTs and their composites with elastomeric polymers, and the potential applications of CNT-elastomeric composites are also captured.

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Section: Mixing Of Cnt With Elastomeric Polymermentioning

confidence: 99%

Section: Applicationsmentioning

confidence: 99%

Carbon nanotube-reinforced elastomeric nanocomposites: a review

Mensah

Kim

Lee

et al. 2015

International Journal of Smart and Nano Materials

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“…Indeed, it is a big problem to uniformly disperse the CNTs in water. 30,31 To solve this problem, vacuum filtration and some other methods are proposed toward the 95% CNTs with 10-30 mm length and 8 nm diameter. The processing steps to prepare the CNT film are as follows (Figure 1):…”

Section: Preparation Of Experimental Materials and Equipmentmentioning

confidence: 99%

Multi-direction health monitoring with carbon nanotube film strain sensor

Qiu

et al. 2019

International Journal of Distributed Sensor Networks

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Carbon nanotubes have been the focus study in composite health monitoring fields due to its better performances and excellent mechanical property. Yet, the performance for multi-direction strain monitoring of the carbon nanotube film sensor has not been concerned. Therefore, this article focuses on the strain monitoring with the circular carbon nanotube film sensor which exhibits the characteristics for multi-direction strain measurement. The carbon nanotube film is fabricated through agitation, sonication, centrifugation, and vacuum filtration. Using the molding machine, the circular carbon nanotube film senor and the rectangular carbon nanotube film sensor are surface bonded with composite laminates, respectively, to compare the multi-direction strain monitoring characteristics. With the prepared laminates, the stretching tests are committed at 0°, 30°, 60°, and 90°using the universal tensile machine. Experimental results of the circular sensor show the steady sensing coefficients that fluctuate between 59.51676 and 60.9273 at different degrees. By comparison, the rectangular sensor presents different sensing coefficients from vertical stretching test and horizontal stretching test. Therefore, the circular carbon nanotube film exhibits multi-direction strain monitoring that can serve as an efficient tool for structural health monitoring of composite structures.

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“…Highly stretchable PDMS has been optimized by using Fe 2+ as cross-linking sites, where the modulus is larger than 0.2 MPa [25]. Ionic liquids, ceramics, and carbon materials (nanotubes and graphite) are blended together with elastomers [26][27][28], but the amounts of added conductive materials cannot be increased infinitely to enhance the dielectric constants due to the limit of the percolation threshold [29].…”

Section: Introductionmentioning

confidence: 99%

Stretchable multifunctional dielectric nanocomposites based on polydimethylsiloxane mixed with metal nanoparticles

Feng

Zhong

Zhao

2019

Mater. Res. Express

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Next generation wearable electronics require stretchable dielectrics. There has been significant effort to characterize and improve the components of dielectric composites for use in these devices. In this work, a new stretchable dielectric material, composited by silver nanoparticles (Ag NPs), nickel nanoparticles (Ni NPs), and polydimethylsiloxane (PDMS), is prepared and characterized. The alternating arrays of Ag NPs groups and Ni NPs groups in the three-dimensional matrix of PDMS function as micro capacitors and prevent current percolation. Compared with PDMS alone, the alternating arrays exhibit a dielectric constant (k) that is increased by 1146% and can reach 35.13, with dielectric loss as low as 0.009. Slightly lower k and larger dielectric loss appear at high frequencies. The material exhibits negative temperature dependence, and the composition ratio affects the dielectric properties. The strain at break is 139.68% and the elastic modulus is as low as 3.57 kPa. By controlling the type, size and dispersion of metal nanoparticles in PDMS matrix, a parallel-plate capacitor with constant capacitance is achieved, demonstrating the dependence of the dielectric constant on the applied strain. Moreover, by replacing the parallel plates with cylindrical fibers, a capacitive strain sensor was demonstrated. After hundreds of stretching-releasing cycles, the dielectrics work normally. The excellent properties of this material suggest its significant potential for use in wearable electronics.

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Highly stretchable dielectric nanocomposites based on single-walled carbon nanotube/ionic liquid gels

Cited by 40 publications

References 39 publications

Carbon nanotube-reinforced elastomeric nanocomposites: a review

Carbon nanotube-reinforced elastomeric nanocomposites: a review

Multi-direction health monitoring with carbon nanotube film strain sensor

Stretchable multifunctional dielectric nanocomposites based on polydimethylsiloxane mixed with metal nanoparticles

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