SYNTHESIS OF POLYANILINE/SULFONATED POLYANILINE (PANI/SPAN) ACID-BASE PAIR WITH VARIOUS POLYANILINE PRECURSOR FOR SPAN

• Main Author: HIDAYAT (NIM : 20512023) ; Pembimbing Dr. Veinardi Suendo, S.Si, M.Eng, FERDINAND
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/18482
• Institution: Institut Teknologi Bandung

Intrinsically Conductive Polymer (ICP) has become an alternative inorganic materials substitute for hole transporting layer (HTL) on the electronic device components. Moreover conductive polymer has a potential to be fabricated onto large area on flexible substrates as well. PEDOT – PSS (poly(3,4-ethylenedioxy thiophene)-polystyrenesulfonate) is most common conductive polymer which applied as HTL, but it is still very expensive. It becomes the idea for synthesis acid – base pair conductive polymer with PEDOT – PSS analogue structure. Polyaniline (PANI) has been reported to be a highly attractive candidate to substitute PEDOT such as in PANI : PSS synthesis based on the ease to synthesis and its high conductivity. However, the conductivity of PANI is highly influenced by the steps of reaction. Moreover, PANI is hard to be processed based on its low solubility in common solvents, thus it has to be modified i.e the sulfonation process. Here, blending PANI with sulfonated polyaniline (SPAN) is expected to produce acid – base pair polymer with high solubility in common solvents, but still retain its high conductive properties. This research consists of three following points : a) synthesis of various PANI precursors, b) determining optimum concentration of chlorosulfonic acid for synthesis SPAN with various PANI precursors (EB and LEB), and c) blending acid – base pair PANI/SPAN. Step of PANI synthesis results high yield and high conductive PANI that obtained at low temperature without stirring, using distilled monomer in 2 M HCl. Here, the mixture of chlorosulfonic acid in sulfuric acid has been was found to be an effective sulfonation agent. Mixture of 60% v/v chlorosulfonic acid in sulfuric acid show an optimum condition for SPAN-EB and SPAN-LEB. Blending of SPAN and PANI has produced green powder acid – base pair PANI/SPAN which soluble in common organic solvents and water. IR spectra of PANI/SPAN show related pattern with PANI, but it has characteristic peaks at 1023 and 1070 cm-1 correspond to the bending vibration mode of C (aryl) – S which appear at SPAN IR pattern as well. Increasing of the intensity of these peaks in PANI/SPAN-LEB indicates the mixture has dominant SPAN properties. Here, properties and conductivity of PANI/SPAN highly depend on the stirring condition especially in the beginning of polymerization step. PANI/SPAN conductivity patterns as a function of frequency show mix properties of metallic PANI and semiconductor SPAN. The highest conductivity of 0.01853 S/cm is obtained by PANI/SPAN-EB acid – base pair.