AI Article Synopsis
- The study explored the effectiveness of graphene-based materials as strain sensors in composite materials, specifically looking at graphene nanoplatelets (GNPs) versus CVD-grown graphene using Raman spectroscopy.
- The thicker GNPs exhibited lower strain sensitivity due to their poor interaction with fibers and inconsistent properties leading to variable strain reports.
- In contrast, CVD graphene showed superior strain sensing performance, providing accurate and reliable readings at low strain levels while revealing interfacial sliding at higher strains.
Article Abstract
The ability of graphene-based materials to act as strain sensors in glass fiber/epoxy model composites by using Raman spectroscopy has been investigated. The strain reporting performance of two types of graphene nanoplatelets (GNPs) was compared with that of graphene produced by chemical vapor deposition (CVD). The strain sensitivity of the thicker GNPs was impeded by their limited aspect ratio and weak interaction between flakes and fibers. The discontinuity of the GNP coating and inconsistency in properties among individual platelets led to scatter in the reported strains. In comparison, continuous and homogeneous CVD grown graphene was more accurate as a strain sensor and suitable for point-by-point strain reporting. The Raman mapping results of CVD graphene and its behavior under cyclic deformation show reversible and reliable strain sensing at low strain levels (up to 0.6% matrix strain), above which interfacial sliding of the CVD graphene layer was observed through an Raman spectroscopic study.
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Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7007000 | PMC |
| http://dx.doi.org/10.1021/acsami.9b09862 | DOI Listing |
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