Title :
Improved electrical conductivity of PANI/PEO polymer via electrospinning and its application as NH3 gas sensor
Author :
Sisi Li ; Gaofeng Zheng ; Xiang Wang ; Yong Chen ; Dezhi Wu ; Daoheng Sun
Author_Institution :
Sch. of Phys. & Mech. & Electr. Eng., Xiamen Univ., Xiamen, China
Abstract :
Higher conductivity of electrospun nanofiber mat was observed by four-terminal resistance measurement compared to polyaniline (PANI)/ Polyethylene oxide (PEO) film based on the same doping method. In order to improve conductivity of the blended polymer and guarantee its spinability in the meanwhile, the concentration of PEO with great molecular weight of 5,000,000 could be decreased to 0.10wt%. The influences of voltage, electrode-to-collector distance and flow rate as well as environmental humidity in electrospinning process on the nanofiber morphology were respectively discussed in detail. PANI/PEO nanofiber mat can be used repeatedly for sensing NH3 gas. The response time is as short as about 6s and it can recover in 6 minutes when exposed to air.
Keywords :
ammonia; conducting polymers; doping; electrical conductivity; electrospinning; gas sensors; humidity; molecular weight; nanofibres; polymer blends; polymer films; NH3; NH3 gas sensing; PANI-PEO polymer; PEO concentration; blended polymer; doping method; electrical conductivity improvement; electrode-to-collector distance; electrospinning; environmental humidity; flow rate; four-terminal resistance measurement; molecular weight; nanofiber morphology; polyaniline-polyethylene oxide film; response time; time 6 min; voltage; Conductivity; Electrical resistance measurement; Films; Gas detectors; Humidity; Optical fiber sensors; Polymers; Electrospinning; Gas sensor; Polyaniline;
Conference_Titel :
Nano/Micro Engineered and Molecular Systems (NEMS), 2013 8th IEEE International Conference on
Conference_Location :
Suzhou
Electronic_ISBN :
978-1-4673-6351-8
DOI :
10.1109/NEMS.2013.6559866
