SYNTHESIS AND OPTIMIZATION OF SULFONATED POLYANILINE AS ORGANIC CONDUCTIVE MATERIAL

• Main Author: REZA (NIM : 10510066) ; Pembimbing Dr. Veinardi Suendo, MUHAMMAD
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/18999
• Institution: Institut Teknologi Bandung

Currently, the need for conductor and semiconductor materials is increasing due to the rapid technology developments, especially in the field of electronics. Materials that commonly used are relatively expensive inorganic compounds. Besides, there are several other disadvantages such as inflexible, synthesis or fabrication process must be very clean, and each material has a definite band gap which is not easy to be tuned up. Polyaniline (PANI) and sulfonated polyaniline (SPAN) are examples of conductive polymers which are quite potentialy applied due to their electronic properties and reasonably priced. SPAN has a good solubility in water that provides convenience for further processings (processable PANI). This research has been carried out on the determination of optimum condition for the synthesis of SPAN. In this study, the optimum condition for sulfonation are using mixture of 30 % v/v chlorosulfonic acid in concentrated sulfuric acid, duration of sulfonation for three days, and the use of cold water as a precipitant. This condition will result SPAN (SPAN 30 %) with suitable characteristics as a conductor material and soluble in water. Sulfonic group has been succeeded to be introduced to the polymer chain which is supported by the presence of a peak at 1066 cm-1 in the FTIR spectrum and a shoulder at 1215 cm-1 in the Raman spectrum, which are typical features of stretching vibrational mode of the C(aryl)-S. The results of conductivity measurements as a function of frequency indicate that SPAN 30% has the same pattern with conductive material with conductivity of 1,48 × 10-2 S/cm. UV-Vis spectrum shows that SPAN has several major absorption bands that represent the presence of benzenoid ring (λ = 300 nm), quinonoid ring (λ = 800 nm), and polaron species (λ = 450 nm). Surface morphology of the resulting SPAN form agglomerated granule-like particles with the average value of sulfonation degree of 45,49%.