Priprema PCL/n TiO2 vlakana tehnikom elektropredenja

master's thesis

• Title (english): Preparation of PCL /n TiO2 fibers by electrospinning technique
• Author: Dajana Puljić
• Mentor: Emi Govorčin Bajsić (mentor)
• Committee member: Emi Govorčin Bajsić (predsjednik povjerenstva)
• Committee member: Budimir Mijović (član povjerenstva)
• Committee member: Nina Vranješ Penava (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2015-07-16, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Chemical Engineering; Chemical Engineering in Material Development

Abstract

Elektropredenje je postupak priprave nanovlakana iz mlaza kapljevine u elektrostatičkom polju. Tehnikom elektropredenja moguće je proizvesti kontinuirana vlakana nanometarskih dimenzija iz različitih vrsta polimera. Mikro- i nano-strukturirani vlaknasti mat na osnovi polikaprolaktona (PCL) u koji su dodane mikro- i nano-čestice TiO2 te titanijeve nanocijevi u udjelu od 0,5 mas % pripravljene su postupkom elektropredenja iz otopine dobivene otapanjem PCL-a u otapalima N, N-dimetilformamidu i tetrahidrofuranu (THF:DMF, 1:1). Elektropredenje vlakna provedeno je pri protoku otopine od 1 ml / h pri 18 kV i udaljenosti između igle i kolektora od 15 cm, pri T = 16,8 °C i relativnoj vlažnosti od 27%. Vlaknasti mat karakteriziran je prije i poslije UV zračenja primjenom diferencijalne pretražne kalorimetrije (DSC), termogravimetrijske analize (TGA), pretražne elektronske mikroskopije (SEM) i infracrvene spektroskopije s Fourierovom transformacijom (FTIR).

Abstract (english)

Electrospinning is an efficient procedure for nanofibers fabrication from a liquid jet through a nozzle under the electrostatic field. It is possible to produce continuous fibers from different types of polymers at the nanometer scale by electrospinning technique. Micro- and nano-structured nonwoven mates based on polycaprolactone (PCL), containing concentrations of 0,5 wt% of micro-and nano-particles TiO2 as well as titanate nanotubes were prepared by electrospinning a polymer tetrahydrofuran/N,Ndimethylformamide (THF:DMF, 1:1) solution. Electrospun PCL/TiO2 nonwoven mates were produced using 1 ml/h solution flow rate, a 18 kV potential and 15 cm distance between the needle tip and the collector. The nonwoven mates were characterized before and 5 and 10 days of UV degradation by differential scanning calorimetry (DSC),thermogravimetric analysis (TGA), Scanning Electron Microscopy (SEM) and Fourier Transform Infrared Spectroscopy (FTIR).

• Keywords: elektropredenje; polikaprolakton; nanokompoziti; nanovlakna
• Keywords (english): electrospinning; polycaprolactone; nanocomposites; nanofibers
• Language: croatian
• URN:NBN: urn:nbn:hr:149:012481
• Study programme: Title: Applied Chemistry - Graduate study; specializations in: Environmental chemistry and green technologies, Advanced materials and technologies, Applied organic chemistry; Course: Advanced materials and technologies; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra primijenjene kemije (magistar/magistra primijenjene kemije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Repository: Repository of Faculty of Chemical Engineering and Technology University of Zagreb
• Created on: 2017-03-03 12:47:56