Effects of inorganic acid in DBSA-PANI polymerization on transparent PANI-SiO_2 hybrid conducting films

摘要

Transparent hybrid conducting films were prepared by dodecylbenzene sulfonic acid-doped polyaniline(DBSA-PANI) and 3-glycidoxypropyltrimethoxysilane (GPTMS) through a sol-gel process. DBSA-PANIwas synthesized via emulsion polymerization, and inorganic acid (nitric or sulfuric acid) was added toadjust the structure of the emulsion system and obtain the higher conductivity of polyaniline. Whennitric acid was used in the emulsion system, structure of the hybrid films became more stable and sheetresistance of the hybrid films was lower. Visible light transmittance of the hybrid films was over 75%. Var-ious properties of the hybrid material were analyzed by the infrared spectra (IR), UV-visible absorptionspectra, thermogravimetric analysis (TG) and digital four-point probe meter.