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Go to Editorial ManagerThis research is based on developing a flexible strain sensor from graphite-treated fabric using knife coating technology. Three sensors were formed, differing in the number of coating layers (2, 4, 6). The results of studying their properties had shown that with increasing a number of coating layers, the electrical conductivity value of the treated samples increased, reaching a value of (21.8×10-3 S/cm). The treated layer was superficial, as the penetration of the coating into the structure did not increase significantly. It was also shown that the treatment did not affect the fabric properties such as hardness and tear strength. When studying the sensor's performance, it was found that the sensor's resistance value changes with the change in its bending angle. The change rate was higher for the six-layer sample, and the response time was shorter, faster (0.8s), than the other samples. Then, a working system was applied to the sensor to give a command to turn the LED on or off by bending the sensor and it showed good performance. This, in turn, confirms the effectiveness of applying this sensor in smart wearable textiles.
Graphene is two Dimension-carbon based nanomaterial, and unique properties of the graphene made it interest to researchers. The objective of this work was to address the need for low-cost, efficient graphene preparation; the electrochemical exfoliation process and photosynthesis of the exfoliated solution were used. In this study, the exfoliated graphite mixture. The exfoliated graphite (Gr2, Gr3, Gr4) (0.08, 0.1, 0.2 M NaCl, respectively) was dried by sunlight and investigated; the results confirmed of multilayer graphene by Raman, UV–Vis, FESEM/EDS, grain size 4–9 µm) . Behavior of UV analysis related with number of single and multilayer of graphene depends on conjugative effect that arises from nanometer-scale sp2 clusters, and chromophore units as well as functional groups, also oxygen clusters may be removed and disappear the shoulder. FTIR peaks confirmed peeling off graphene layers. One of the most important reactions is the incorporation of Cl atoms into unsaturated sites. Grain size increased with increasing voltage, while it decreased in (0.2 M) NaCl. FESEM showed a smooth, crimped surface. EDS analysis showed a C/O ratio of (7.6, 4.6, 1.26), with Cl and Na observed in rinsed Gr3. D, G, and 2D peaks were displayed by Raman spectroscopy. In this study, it was concluded that NaCl-assisted exfoliation is a simple and low-cost route.
Strengthening elastomers by the Nano-fillers, for example, Graphite subordinates, have high embellishments on their attributes. In the present work, Graphene Oxide (GO) nano-sheets have scattered in huge rubbers was Nitrile Butadiene Rubber (NBR). Enhancement the vulcanization procedure on (GO/NBR) nano-composite elastic was performed by arrangement blending strategy and rumination blending method. Scattering of GO into NBR was homogenous, where affirmed by Scanning Electron Microscopy (SEM) and X-beam Diffraction (XRD) test. Breaking down the useful gatherings by Fourier-Transformed Infrared Spectrophotometry (FTIR) has been explored as well. Diverse stacking wt% of GO inside NBR has clear impacts on the rigidity and flexibility conduct of the nano-composite. Impact of GO on the electrical conductivity and persuasive properties of GO/NBR nano-composite elastic portrayed too. The GO presence has upgraded the crosslinking trademark in GO/NBR nano-composite elastic and enhanced its properties.