Fabrication of polymer nanofiber / poly (3,4 ethylene dioxythiophene) / metal particle hybrid composite for volatile organic compound sensing applications
tarafından
 
Acar, İrem, author.

Başlık
Fabrication of polymer nanofiber / poly (3,4 ethylene dioxythiophene) / metal particle hybrid composite for volatile organic compound sensing applications

Yazar
Acar, İrem, author.

Yazar Ek Girişi
Acar, İrem, author.

Fiziksel Tanımlama
ix, 40 leaves: illustrarions, charts;+ 1 computer laser optical disc.

Özet
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.

Konu Başlığı
QD79.C45 A168 2020
 
Gas chromatography.
 
Gas detectors.
 
Chemical detectors.

Yazar Ek Girişi
Yıldız, Ümit Hakan,

Tüzel Kişi Ek Girişi
İzmir Institute of Technology. Chemistry.

Tek Biçim Eser Adı
Thesis (Master)--İzmir Institute of Technology:Chemistry.
 
İzmir Institute of Technology:Chemistry--Thesis (Master).

Elektronik Erişim
Access to Electronic Versiyon.


LibraryMateryal TürüDemirbaş NumarasıYer NumarasıDurumu/İade Tarihi
IYTE LibraryTezT002201QD79.C45 A168 2020Tez Koleksiyonu