عنوان
پدید آورنده
موضوع
رده
کتابخانه
محل استقرار
TL58150
انگلیسی
Uçucu organik bileşik algılama uygulamaları için polimer nanofiber / poli (3,4 etilen dioksitiyofen) / metal parçacık hibrit kompozit üretimi
[Thesis]
Acar, Irem
Yıldız, Ümit Hakan
Izmir Institute of Technology (Turkey)
2020
50 p.
Master's
Izmir Institute of Technology (Turkey)
2020
This study aims to produce polymer nanofiber / poly (3, 4 ethylene dioxythiophene) / metal particle hybrid composite as a bioelectronic interface for the detection of volatile organic compounds in human breath. The sensor platform consists of two layers: polymeric nanofiber structure and conductive layer. Polyurethane (PU), polycaprolactone (PCL) and poly L-lactide-co-ɛ-caprolactone (PLLCL) were selected to form polymeric nanofibers with electrospinning. For electrospinning process, solutions of polyurethane (PU) (25wt%) in DMF, polycaprolactone (PCL) (20wt%) in DCM (4) -DMF (1) and poly L-lactide-co-ɛ-caprolactone (PLLCL) (10wt%) in DCM (9) -DMF (1) are prepared. PU, PCL and PLLCL polymer solutions are subjected to 25 kV, 29kV and 25 kV electrical potential, respectively, to produce electrospinning fibers. Poly(3,4-ethylenedioxythiophene) (PEDOT) and multi-walled carbon nanotubes (MWCNTs) are used to produce conductive layers on PU, PCL and PLLCL polymer nanofibers. The produced sensor platforms are tested by the electrochemical station, which records the electrical current change over time. The sensing mechanism is assumed to be the adsorption of VOCs to the conductive PEDOT and CNT layer, thus blocking the electron current on the PEDOT and CNT network and causing resistance change. More clearly; swelling of the polymer structure in the sensor causes destruction in the upper layer and micro-dimensional cracks in the PEDOT and CNT network, increasing resistance to electron flow and decreasing current. Organic volatile compounds (acetone, toluene, ethanol, isopene etc.) are detected from ppm to ppb range and reproducible and reliable responses are recorded.
Chemistry
Nanomaterials
Volatile organic compounds--VOCs
Acar, Irem
Yıldız, Ümit Hakan
Izmir Institute of Technology (Turkey)
مطالعه متن کتاب p
[Thesis]
276903
a
Y
