Abstract
The copolymer samples composed of acrylamide with different amounts of 2-acrylamido-2-methylpropane sulfonic acid and aniline were synthesized with a cross-linker N, N’-methylene bisacrylamide and an initiator potassium per sulfate by a free radical copolymerization method. Cheap and disposable pencil graphite electrodes were developed by surface modification with hydrogel polymer coating. The sensing property of the electrodes was characterized by cyclic voltammetry, differential pulse voltammetry, and square wave voltammetry. The molecular structure of the hydrogel polymers was characterized by FT-IR spectroscopy. The morphology of the resulting hydrogels was studied by SEM and X-ray diffraction. The sensing properties of the hydrogel polymer-coated electrodes were tested in different concentrations of methylene blue in deionized water with variable dipping times of the electrodes. The cyclic voltammetric characterizations of a copolymer of aniline with the hydrogels coated pencil graphite electrodes showed higher sensing response to methylene blue dye.
Published Version
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