Multiscale metrologies for process optimization of carbon nanotube polymer composites

Abstract

Carbon nanotube (CNT) polymer nanocomposites are attractive multifunctional materials with a growing range of commercial applications. With the increasing demand for these materials, it is imperative to develop and validate methods for on-line quality control and process monitoring during production. In this work, a novel combination of characterization techniques is utilized, that facilitates the non-invasive assessment of CNT dispersion in epoxy produced by the scalable process of calendering. First, the structural parameters of these nanocomposites are evaluated across multiple length scales (10 -10 m to 10 -3 m) using scanning gallium-ion microscopy, transmission electron microscopy and small-angle neutron scattering. Then, a non-contact resonant microwave cavity perturbation (RCP) technique is employed to accurately measure the AC electrical conductivity of the nanocomposites. Quantitative correlations between the

Aligned carbon nanotube morphogenesis predicts physical properties of their polymer nanocomposites

“…3B) that is much weaker than the inverse scaling predicted for randomly contacting uncorrelated rods, 62 but consistent with the scaling predictions for diffusionlimited networks of semi-dilute elongated macromolecules predicted by de Gennes and coworkers (ξ ∼ V f −0.5 ). 64,65 We now turn our attention to the transport properties (thermal and electrical conductivity) of the A-PNCs utilizing the junction density and distance quantification discussed above.…”

Recent Studies on the Multiscale Analysis of Polymer Nanocomposites

“…Therefore, it is possible to more accurately analyze the various physical behaviors and phenomena of polymer nanocomposites based on this analysis. Analysis of the effect of parameters related to the distribution of fillers, such as dispersion [122,[131][132][133][134][135][136][137][138][139][140][141], agglomeration [123,142,143], clustering [144], and volume concentration effect [145] on the physical properties of nanocomposites, as a key factor when inserting nano filler into polymer nanocomposites, is being carried out. The effect of the interphase generated around the filler can be properly interpreted through the multiscale analysis methodology.…”

Development of Printed Sensors for Shoe Sensing Applications

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“…The processing of these materials has been done in different ways to develop sensor prototypes for specific applications. For these substrate materials, different conductive materials like carbon [7], silver [8], gold [9], aluminum [10], etc. have been used to develop the electrodes of the sensor.…”

“…Response of the sensor patch in terms of reactance and frequency connected with the LCR meter with rapid motion expressed in the forced and relaxed state.is[7].…”