Abstract
This article investigates the possibility of soluble polypyrrole coating on cellulose as an alternative low-cost electrode material for paper speaker application. Soluble polypyrrole was prepared using β-naphthalene sulfonic acid as dopant and ammonium persulfate as oxidizing agent. For coating soluble polypyrrole on regenerated cellulose, prepared polypyrrole powder was dissolved in N-Methylpyrrolidone. N-Methylpyrrolidone was chosen to dissolve β-naphthalene sulfonic acid-doped polypyrrole due to large dielectric constant (32.2) compared with other organic solvents. It is observed that the optical transmittance of cellulose tends to decrease while electrical conductivity increases with increase of the β-naphthalene sulfonic acid doped polypyrrole–N-Methylpyrrolidone coatings, due to increased thickness of the polypyrrole layer on cellulose films.
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