Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5439615 | Composites Part A: Applied Science and Manufacturing | 2017 | 9 Pages |
Abstract
Poor sensitivity in low pressure regimes (<100Â kPa) of pressure-sensitive rubbers (PSRs) is one of their major disadvantages compare to other piezoresistive materials. The reasons induced the poor sensitivity include bad dispersion and week interface of multi-walled carbon nanotubes (MWCNTs) applied in poly(dimethyl siloxane) (PDMS). A novel vinyl-terminated poly(dimethyl siloxane)-poly(phenylmethyl siloxane)-multi-walled carbon nanotubes (V-P-MWCNTs) with core-dualshell nanostructure is fabricated by noncovalently functionalized method. The V-P-MWCNTs as conductive fillers exhibits homogenous dispersion as well as good interfacial interaction in PDMS matrix. Slightly above the percolation threshold (0.19Â vol.%), the PDMS-based nanocomposites with 0.2Â vol.% of V-P-MWCNTs shows high piezoresistive sensitivity (22.16Â ÃÂ 10â3Â kPaâ1), high electrical conductivity (5.43Â ÃÂ 10â3Â S/m) and low Young's modulus (288.83Â kPa). These results demonstrate that the V-P-MWCNTs are of great potential as the conductive fillers for improved piezoresistive sensitivity of PDMS nanocomposites, which can be potentially applied in the flexible touch sensors.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Biao Zhang, Buyin Li, Shenglin Jiang,