Structural and Dielectric Studies of MWCNT Reinforced Microcellular Silicone Elastomer Nanocomposite

Agrawal, Sadhana; Ojha, K. S.; Sahu, Dilip Kumar

doi:10.1016/j.matpr.2015.10.065

Cited by 5 publications

(2 citation statements)

References 15 publications

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“…Moreover, the FTIR spectra in the range of 400 to 3400 cm −1 (Figure 3B) were demonstrated for IR-active fundamental vibrations of MWCNTs (a), Co-TAPP-COFs (b), SnO 2 @ MWCNTs (c), and PCTSMT3 (d), offering better insight into the chemical structure of different nanocomposites. Figure 3B shows the FTIR spectra of MWCNTs, Agrawal et al 23 reported that the absorption peak at 1635 cm −1 corresponded to the C�C stretching vibration, and the peaks at 1234, 668, and 782 cm −1 were assigned to the C−C disordered stretching, the out-of-plane C−H vibration, and the out-of-plane bending of C−H, respectively. The as-synthesized Co-TAPP-COFs were further characterized by the FTIR spectra, in which the imine linkage of the COF structure was confirmed.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Three-Dimensional van der Waals Heterostructure-Based Nanocages as Supersensitive 3-Hydroxy-2-butanone Gas Sensors at Room Temperature

Shao

Zhang

et al. 2023

ACS Sens.

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3-Hydroxy-2-butanone is one of the biomarkers of Listeria monocytogenes, which is quite important for the intelligent detection of 3H-2B. However, it is still a challenge to fabricate sensing materials obtaining excellent sensitivity and selectivity under the ppb-level detection limit. Herein, a plasma-assisted synthetic approach was proposed for the construction of hierarchical nanostructures and the simultaneous loading of TAPP-COFs, which could reduce interlayer interaction and convert the metallized sites on the surface of predesigned porphyrin rings into quantum nanoparticles. These multichannel pathways of Co-TAPP-COFs@SnO 2 @ MWCNTs nanocages contributed to the gas adsorption and diffusion, thus enhancing the sensing behavior. The nanocages exhibited a highly specific sensing performance toward 3H-2B with the highest sensitivity (R a /R g = 100.9 to 0.5 ppm) in all reported sensing materials. The 3H-2B sensor presented outstanding long-term stability, and the detection limit was 100 ppb at room temperature. Furthermore, the synthesized materials were integrated into the sensing module connecting to an Internet of Things platform, providing rapid and real-time detection of 3H-2B. We also applied machine learning methods to analyze the nanocage-based sensors and found that the combined effects of modified sites on the heterointerfaces contributed to the improvement of the sensing performance.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Three-Dimensional van der Waals Heterostructure-Based Nanocages as Supersensitive 3-Hydroxy-2-butanone Gas Sensors at Room Temperature

Shao

Zhang

et al. 2023

ACS Sens.

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“…Consequently, dielectric permittivity (ε) and elastic modulus (E) are the two material parameters which provides a handle to tailor the response of DEA under applied electric field E f . Higher ε will induce larger σ, therefore different fillers such as carbon black, CNTs [31][32][33], TiO 2 [34], BaTiO 3 [35,36], and PbTiO 3 [37][38][39] are used to increase the low dielectric permittivity of PDMS. However, the incorporation of fillers also increases the E (or stiffness) of DEA.…”

Section: Introductionmentioning

confidence: 99%

Augmenting bending stroke of soft dielectric unimorph actuator using carbon nanotubes

Baranwal¹,

Agnihotri²

2020

Smart Mater. Struct.

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Experimental investigations are carried out to quantify the effect of carbon nanotubes (CNTs) addition on the actuation performance of polydimethylsiloxane (PDMS) based soft dielectric elastomer actuator (DEA). The actuation ability of pure PDMS and CNT/PDMS composite samples is compared in unimorph configuration. Comparative analysis of experimental results shows that incorporation of optimum CNT concentration (0.05 wt%) significantly enhances the tip displacement (two times) and efficiency (three times) of pure PDMS based DEA. Increasing the CNT concentration beyond optimum level degrades the tip displacement and efficiency of bend actuator. The experimental results are well supported by the theoretical analysis and finite element simulations. Moreover, experimental and numerical findings are combined to establish microstructure-property relationship of DEA. It is shown that at optimum CNT concentration, the induced Maxwell stress compensates for the increase in stiffness of DEA. However, the enhanced stiffness and agglomeration beyond optimum CNT loading results in lower tip displacement.

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A dipolar silicone dielectric elastomer and its composite with barium titanate nanoparticles

Liu

Yang

et al. 2020

J Mater Sci: Mater Electron

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Structural and Dielectric Studies of MWCNT Reinforced Microcellular Silicone Elastomer Nanocomposite

Cited by 5 publications

References 15 publications

Three-Dimensional van der Waals Heterostructure-Based Nanocages as Supersensitive 3-Hydroxy-2-butanone Gas Sensors at Room Temperature

Three-Dimensional van der Waals Heterostructure-Based Nanocages as Supersensitive 3-Hydroxy-2-butanone Gas Sensors at Room Temperature

Augmenting bending stroke of soft dielectric unimorph actuator using carbon nanotubes

A dipolar silicone dielectric elastomer and its composite with barium titanate nanoparticles

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