Humidity sensing using polyaniline/polyvinyl alcohol nanocomposite blend

International Conference on Advances in Manufacturing, Materials and Energy Engineering 2018

材料科学;能源学

Deshkulkarni, Bharat^1 ; Viannie, Leema Rose^1 ; Ganachari, Sharanabasava V.^1 ; Banapurmath, Nagraj R.^1 ; Shettar, Ashok^2

Centre for Material Science, School of Mechanical Engineering, KLE Technological University, Hubli, India^1

Department of Civil Engineering, KLE Technological University, Hubli, India^2

关键词: Electrical resistances;    Fabricated sensors;    Humidity sensitivity;    Inter-digitated electrodes;    Low cost fabrication;    Nanocomposite blends;    Organic conducting polymers;    UV visible spectroscopy;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/376/1/012063/pdf
DOI  :  10.1088/1757-899X/376/1/012063

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Studies on organic conducting polymers have gained attention in the past decade due to their simple, low cost fabrication processes, low temperature operation and ability to conform to various device shapes and geometries. This paper presents chemical oxidative synthesis of HCl doped polyaniline (PANI)/polyvinyl alcohol (PVA) nanocomposite using ammonium persulphate as oxidizing agent. PANI/PVA blends were prepared by adding 0.05mM, 0.1mM and 0.15mM concentrations of PVA into synthesized PANI in aqueous solvent. UV-Visible spectroscopy and FTIR spectroscopy were used to investigate the analytical and functional groups present in the synthesized nanocomposites. The results indicated the formation of highly conducting PANI/PVA blends. Humidity sensors were prepared by casting thin films of as-prepared nanocomposites with varying concentrations of PVA onto interdigitated electrodes over PCB. On exposure to humidity, it was observed that the electrical resistance of the fabricated sensors reduced by 60-75% for 90% humidity. It may be concluded that the addition of appropriate amount of PVA to PANI enhanced the humidity sensitivity.