Abstract
A novel chitosan film was prepared using an electric charge generated on a cast plate and was given characteristic physical properties. Two metal plates were adhered together with Teflon sheet between them. An acetic acid solution of chitosan was poured on the upper plate and a negative charge was supplied galvanostatistically on the metal plate. The solution was dried in order to make the film at room temperature. The cross sectional morphology and the physical properties of tensile strength, breaking elongation and work energy of breaking of the film were compared with those of film prepared without supplying electric potential. The film prepared with an electric charge (VF) was curled gently in water and then gradually flattened. The film prepared without charge (NVF) was curled tightly in water and maintained this shape for a long time. In the cross sectional structure of VF, a line pattern parallel to the film surface was observed microscopically, while a vertical pattern was seen in NVF. The presence of electron on the plate was confirmed by measuring the accumulated volume of negative potential using an oscilloscope connected to the metal plate.
