| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7215269 | Composites Science and Technology | 2015 | 7 Pages |
Abstract
Electrical, mechanical and piezoresistive behavior of flexible thin films of multi-walled carbon nanotubes (MWCNT) embedded in poly(methyl methacrylate) (PMMA) matrix are investigated for structural health monitoring applications. Three sets of MWCNT/PMMA nanocomposite thin films at various weight percentage of MWCNT are fabricated using solvent casting method. Dichloromethane (DCM) is used as a solvent. The percolation threshold for electrical conductivity is found to be 3 weight percentage of MWCNT. The mechanical properties of thin films are evaluated via monotonic uniaxial tensile test. The rate of loading is 1Â mm/min and applied load and crosshead displacement are sampled at 10Â Hz frequency. Experimental results showed that addition of 10 weight percentage of MWCNT leads to a significant improvement in the tensile strength of PMMA by 291% and tensile strain by 122%. The piezoresistive behavior at different weight percentage of MWCNT is evaluated and highest gage factor of 4.37 is achieved at the percolation threshold.
Related Topics
Physical Sciences and Engineering
Engineering
Engineering (General)
Authors
Sai Makireddi, Shivaprasad S, Gautham Kosuri, Francis V. Varghese, Krishnan Balasubramaniam,