Electrical conductivity of CNT/polymer composites: 3D printing, measurements and modeling
By A. Mora, P. Verma, Shanmugam Kumar. 2020
245 citations recorded by the source corpus.
Abstract We present electrical conductivity measurements and modeling aspects of carbon nanotube (CNT)/polymer composites enabled via fused filament fabrication (FFF) additive manufacturing (AM). CNT/polylactic acid (PLA) and CNT/high density polyethylene (HDPE) filament feedstocks were synthesized through melt blending with controlled CNT loading to realize 3D printed polymer nanocomposites. Electrical conductivity of 3D printed CNT/PLA and CNT/HDPE composites was measured for various CNT loadings. Low percolation thresholds were obtained from measured data as 0.23 vol. % and 0.18 vol. % of CNTs for CNT/PLA and CNT/HDPE nanocomposites, respectively. Moreover, a micromechanics-based two-parameter agglomeration model was developed to predict the electrical conductivity of CNT/polymer composites. We further show that the two agglomeration parameters can also be used to describe segregated structures, wherein nanofillers are constrained to certain locations within the matrix. To the best of our knowledge, this is the first ever electrical conductivity model to account for segregation of CNTs in the matrix. A good agreement between measured conductivity and predictions demonstrates the adequacy of the proposed model. We further evince the robustness of the model by accurately capturing the conductivity measurements reported in the literature for both elastomeric and thermoplastic nanocomposites. The findings of the study would provide guidelines for the design of electro-conductive polymer nanocomposites.
Subfields: Automotive Engineering, Biomedical Engineering, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/f8ecec30539c9bc5d7c3efae4ff24e58e6f5f7eb
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Biomedical Engineering
In Materials Chemistry
Citations in the corpus
- Additive manufacturing of polymer nanocomposites: Needs and challenges in materials, processes, and applications (2021, methodology): “Mora et al. [62] used the melt blending technique to fabricate FFF filaments for HDPE/CNT composites.”