Morphological and electrical properties of inkjet-printed polyaniline films.

Date

10-2010

Degree

Bachelor of Science in Applied Physics

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Emmanuel A Florido

Abstract

The surface characteristics and sheet resistance of inkjet-printed polyaniline-emeraldine salt films were observed and analyzed against varying number of prints (15 30, and 60 prints) on bare inkjet transparency sheets. The dispersion of polyanilin particles with an average diameter of 0.30 um was used as ink. This was prepared vi emulsion polymerization of aniline in the presence of 70% (w/v) dodecylbenzene sulfonio acid (DBSA) in 2-propanol, which served as dopant and surfactant; and ammonium persulfate (APS), which served as the catalyst of the polymerization. Sodium dodecyl sulfonate (SDS) was added to stabilize the dispersion and decrease its viscosity, making it suitable for inkjet-printing. An Epson Stylus T13 inkjet printer was used to deposit the films. Samples with 15 prints exhibited qualitatively the roughest surface based on the electron micrographs. The sheet resistances of the films were measured through the Van der Pauw method. It was found that the resistance was significantly decreased from 214.38 kn to 77.09 kn when prints were increased from 15 to 30, while only a slight decrease to 64.96 kn was observed from 30 to 60 prints. The nonlinear behavior of sheet resistance with increasing number of prints can be attributed to a concurrent increase in surfactant concentration in the film. The results imply that the optimal number of prints with inkjet transparency as substrate is between 30 and 50.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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