Ionic Liquid/Styrene-Acrylonitrile Copolymer Nanofibers as Chemiresistor for Alcohol Vapours

Abstract

SAN/BMIPF 6 nanofibers were fabricated by an electrospinning process and used as chemiresistors for sensing alcohol vapours. A hydrophobic and air-stable ionic liquid, BMIPF 6 , was used to impart electrical conductivity to insulating SAN nanofibers. The effects of BMIPF 6 addition on the morphology of the nanofibers were explained in terms of surface tension, viscosity and conductivity. After exposing the SAN/BMIPF 6 nanofibers collected on an interdigitated electrode to alcohol vapours (ethanol, 1-propanol and 1-butanol), the resistance of the nanofibers decreased due to adsorption of alcohol molecules. The electrospun SAN/BMIPF 6 nanofibers sensor exhibited good sensitivity and reproducibility.

Fabrication of styrene–acrylonitrile random copolymer nanofiber membranes from N,N-dimethyl formamide by electrospinning

“…Yu and Liu 19 produced SAN-supported palladium (Pd) catalyst and obtained fibers of diameter 200 nm that contained nanoparticles of Pd. Kim et al 20 fabricated ionic liquid/SAN nanofibers for detection of alcohol vapors. In those reports, however, the effect of electrospinning parameters on SAN nanofiber has not been systematically investigated.…”

Imidazole-based ionogel as room temperature benzene and formaldehyde sensor

“…Sensitivity levels of 10, 6, 6, 8, and 2% were measured when tested against 1000 ppm of toluene, hexane, propanal, ethanol, and acetone vapors, respectively. Moreover, 1-butyl-3-methylimidazolium hexafluorophosphate ([BMI][PF6]) IL was incorporated to nanofibers of styreneacrylonitrile [11]and nylon-6,6 [12]. Both systems were tested in air against different alcohols (22.0-276.1 ppm), THF (707.4 ppm) or ace-tone (904.5 ppm) vapors, showing good reversible responses and low recovery times.…”

Ionogel Fiber Mats: Functional Materials via Electrospinning of PMMA and the Ionic Liquid Bis(1-butyl-3-methyl-imidazolium) Tetrachloridocuprate(II), [Bmim]2[CuCl4]

“…The same group also developed a CO 2 sensor using electrospun ionogels [54]. Shim and coworkers reported on vapor sensors for organic solvents (methanol, ethanol, 1-propanol, 1-butanol, tetrahydrofuran, acetone) based on electrospun poly(styrene/acrylonitrile)/ 6 ] nanofibers [55,56]. Liu et al obtained electrodes for the detection of dopamine, ascorbic acid, uric acid, guanine, and adenine from electrospun carbon nanofiber / 1-butyl-4-methyl-pyridinium hexaflurophosphate composite fibers [57].…”