A new conducting composite flexible material prepared from cellulose acetate (CA) polymer and graphite has been developed and used for the fabrication of electrodes, which were then characterized by cyclic voltammetry and electrochemical impedance spectroscopy. Scanning electron microscopy (SEM) was used to provide information concerning the morphology of the composite electrode surface. The potential window, background currents and capacitance were evaluated by cyclic voltammetry in the pH range from 4.6 to 8.2. The voltammetry of model electroactive species demonstrates a close to reversible electrochemical behaviour, under linear diffusion control. The electroactive area of the composite electrodes increases after appropriate electrode polishing and electrochemical pre-treatment. The electrodes were used as substrate for the electropolymerisation of the phenazine dye neutral red, for future use as redox mediator in electrochemical biosensors. The composite electrodes were also successfully used for the amperometric detection of ascorbate at 0.0 V vs. SCE, and applied to the measurement of ascorbate in Vitamin C tablets; the sensor exhibits high sensitivity and a low detection limit of 7.7 [mu]M. Perspectives for use as a versatile, mechanically flexible and robust composite electrode of easily adaptable dimensions are indicated
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机译：已经开发了一种新的由醋酸纤维素（CA）聚合物和石墨制成的导电复合柔性材料，并将其用于电极的制造，然后通过循环伏安法和电化学阻抗谱对其进行表征。扫描电子显微镜（SEM）用于提供有关复合电极表面形态的信息。通过循环伏安法在4.6至8.2的pH范围内评估电势窗口，背景电流和电容。在线性扩散控制下，模型电活性物质的伏安法显示出接近可逆的电化学行为。经过适当的电极抛光和电化学预处理后，复合电极的电活性面积增加。电极用作吩嗪染料中性红的电聚合的底物，以备将来在电化学生物传感器中用作氧化还原介体。该复合电极还成功用于0.0 V vs. SCE的抗坏血酸的安培检测，并用于维生素C片剂中抗坏血酸的测量；该传感器表现出高灵敏度和7.7μM的低检测限。指出了用作易于适应尺寸的多功能，机械柔韧性强的复合电极的观点
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