Controlled manipulation of CNTs in glass/epoxy composites with cut-outs using non-uniform electric field

Pothnis, Jayaram R.; Kalyanasundaram, Dinesh; Gururaja, Suhasini

doi:10.1080/09243046.2020.1744220

Cited by 7 publications

(1 citation statement)

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“…The electrical conductivity (reciprocal of resistivity) of the prepared CNT/polymer composites is directly proportional to the intrinsic conductivity of the CNT itself and the CNT loading percentage [269]. Pothnis et al aligned MWCNTs within unidirectional (UD) glass/ Epoxy composites using a nonuniform electric field of 300 Vrms at a frequency of 50 kHz [270]. They investigated the resistance of the formed composites along and across the alignment direction at MWCNT loading percentages of 0.01, 0.05, and 0.01 wt.% (figure 16(b)).…”

Section: Polymer Compositesmentioning

confidence: 99%

Dielectrophoretic alignment of carbon nanotubes: theory, applications, and future

2023

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Carbon nanotubes (CNTs) are nominated to be the successor of several semiconductors and metals due to their unique physical and chemical properties. It has been concerning that the anisotropic and low controllability of CNTs impedes their adoption in commercial applications. Dielectrophoresis (DEP) is known as the electrokinetics motion of polarizable nanoparticles under the influence of non-uniform electric fields. The uniqueness of this phenomenon allows DEP to be employed as a novel method to align, assemble, separate, and manipulate CNTs suspended in liquid mediums. This article begins with a brief overview of CNT structure and production, with the emphasize on their electrical properties and response to electric fields. The DEP phenomenon as a CNT alignment method is demonstrated and graphically discussed, along with its theory, procedure, and parameters. We also discussed the side forces that arise in DEP systems and how they negatively or positively affect the CNT alignment. The article concludes with a brief review of CNT-based devices fabricated using DEP, as well as the method’s limitations and future prospects. 

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Section: Polymer Compositesmentioning

confidence: 99%