Esnek elektriksel iletken polimer kompozitlerin elektriksel özelliklerinin incelenmesi

Polymers are materials which are generally insulative in terms of electrical conductivity. Some filling materials must be added into the polymer matrix in order to make the polymers electrically conductive. The trend observed in conductive polymer composites, which has been an attractive topic for researchers and industry in recent years, is the production of flexible conductive polymer composites. Flexible conductive polymer composites are highly suitable materials for electrical applications, medical applications, surveillance (civilian and military applications), control systems. Here we have produced commercially feasible, industrially applicable, flexible, and sensitive electrically conductive composites that are compatible with the human body and can be used as strain sensors. The styrene-ethylene-butylene-styrene (SEBS) copolymer, a thermoplastic elastomer, has good elasticity and mechanical strength and is therefore chosen as the binding matrix material. In the class of carbon-based fillers, reduced graphene oxide (rGO) was chosen as the conductive filler due to its excellent electrical properties.To prepare the SEBS/rGO conductive composites, SEBS was dissolved in the appropriate solvent and rGO was added to it, and the composite was coated onto the flexible fabric by solution casting and allowed to dry at room temperature. To investigate the electromechanical behavior and to examine the effects of elongation and test speed on the sensor performance and also to get idea about the long-term use of the sensor samples were tested for 50 cycles at speeds of 20 mm/min and 50 mm/min under elongation of 5, 7.5 and 10%. In the given investigation, rGO were added to the SEBS co-polymer, and tested under different strain percentage(5, 7.5, 10% strain) at different speeds (20mm/min, 50mm/min) to investigate the the electromechanical properties of the stain sensitive coated textile sensor. The results showed that the resistance increased due to the applied strain up to a certain value and strain rate was found significant in terms of sensitivity. Based on these results, the usage range of the sensor is determined. The results of the study showed that flexible, conductive SEBS / rGO composites can be used as stretchable sensor materials. Flexibility of the sensor, its electrical conductivity, ease of use, and its compatibility with the human body make this study to have a major impact on the sensor literature.