PDF Publication Title:
Text from PDF Page: 203
Chapter 7 – Application of Graphene composites: Raman Strain Sensors 7.2.3. Raman deformational study of FLG/epoxy composite coatings The FLG/epoxy composite coatings and the reference monolayer composite coating samples were subjected to strain using 4-point bending as shown in Figure 7.4b. The position of 2D band with strain was followed to study to the strain response of the graphene. The Raman 2D band shifted significantly with the applied strain for the reference monolayer graphene composite coating indicating stress transfer occurred in the coatings (Figure 7.5a). The shift rate of ~ -48 cm-1/% strain obtained is comparable to the previous studies on such sandwich composites systems.32 273 The 2D band response of FLG/epoxy composites with strain is completely different to that of the reference monolayer composite (Figure 7.5a). The 2D band position of all the FLG/epoxy samples remained unchanged within error. It has to be mentioned that, for the reference MC SLG, the average from three different positions within the same flake are considered for calculations. Whereas for FLG/epoxy composite coatings, the average values from 3-5 random positions at each strain level were considered to obtain an overall response of the coating. Thus, the relatively large error bars are due variation in the Raman response within the sample. Figure 7.5: a) The shift of 2D band with loading strain for all the FLG/epoxy composite coatings along with the reference MC SLG composite coating at random positions within the composites. b) The shift of 2D band with loading strain of FLG-0.5, FLG-1 and FLG-20 at the same spot. Instead of taking measurements from the different positions within the composite coatings, the 2D band response was monitored at the same spot during deformation for 203PDF Image | PRODUCTION AND APPLICATIONS OF GRAPHENE AND ITS COMPOSITES
PDF Search Title:
PRODUCTION AND APPLICATIONS OF GRAPHENE AND ITS COMPOSITESOriginal File Name Searched:
graphene-production-applications.PDFDIY PDF Search: Google It | Yahoo | Bing
Salgenx Redox Flow Battery Technology: Power up your energy storage game with Salgenx Salt Water Battery. With its advanced technology, the flow battery provides reliable, scalable, and sustainable energy storage for utility-scale projects. Upgrade to a Salgenx flow battery today and take control of your energy future.
| CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com | RSS | AMP |