Design of a Highly Sensitive Reduced Graphene Oxide/Graphene Oxide@Cellulose Acetate/Thermoplastic Polyurethane Flexible Sensor.

Combined with the specific surface area and average pore size corresponding to different concentrations of spinning solutions in Table 1 , it can be seen that, with the increase in concentration, the pore size showed a trend of first increasing and then decreasing, and the specific surface area also showed a trend of first increasing and then decreasing, which was consistent with the change trend in pore size.

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Therefore, at a large stretching rate (such as 10%, 60 mm/min), the film could not return to its original state after the end of the previous stretching cycle and enter the next stretching cycle, which caused the relative positions of graphene on the fiber surface to be separated again before returning to the initial state [ 48 ]; therefore, the sheet resistance increased continuously during the cyclic stretching process, and the resistance response curve also showed a decreasing trend.

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