Raman study of interfacial load transfer in graphene nanocomposites
Abstract
We tracked the strain-sensitive characteristic Raman G-band shift of graphene platelets in polydimethyl-siloxane (PDMS) nanocomposites revealing the filler-to-matrix interactions. We obtained large debonding strains of ∼7% for graphene in PDMS, with the peak shift rate with strain being ∼2.4 cm−1/composite strain % in comparison to single-walled carbon nanotube composites, where a relatively low rate of ∼0.1 cm−1/composite strain % was obtained, suggesting enhanced load-transfer effectiveness for graphene. A surprising observation was that for large strains (>1.5%) the graphene fillers went into compression under uniaxial tensile deformation and vice versa. We propose that this effect is related to the high mobility of the PDMS chains at room temperature.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Feb 07, 2011
- Source ID
- 10.1063/1.3552685
Entities
People
- Iti Srivastava
- Linda Schadler
- Nikhil Koratkar
- Rutvik J. Mehta
- Zhong-zhen Yu
Organizations
- Beijing University of Chemical Technology
- National Science Foundation
- Office of Naval Research
- Rensselaer Polytechnic Institute