Journal
MATERIALS
Volume 12, Issue 16, Pages -Publisher
MDPI
DOI: 10.3390/ma12162613
Keywords
3D printing; fused deposition modelling; conductive polymer composite; piezoresistivity; 3D resistance network model
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Funding
- Basic Science Research Program through the National Research Foundation of Korea - Ministry of Science, ICT, & Future Planning [2015R1C1A1A01051620]
- National Research Foundation of Korea grant - Korean government (MSIP) [2012R1A5A1048294]
- National Research Foundation of Korea [2015R1C1A1A01051620] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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To develop highly sensitive flexible pressure sensors, the mechanical and piezoresistive properties of conductive thermoplastic materials produced via additive manufacturing technology were investigated. Multi-walled carbon nanotubes (MWCNTs) dispersed in thermoplastic polyurethane (TPU), which is flexible and pliable, were used to form filaments. Specimens of the MWCNT/TPU composite with various MWCNT concentrations were printed using fused deposition modelling. Uniaxial tensile tests were conducted, while the mechanical and piezoresistive properties of the MWCNT/TPU composites were measured. To predict the piezoresistive behaviour of the composites, a microscale 3D resistance network model was developed. In addition, a continuum piezoresistive model was proposed for large-scale simulations.
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