Electron paramagnetic resonance (EPR) spectroscopy studies of plasma-induced radicals in pre-electrospinning polymeric solutions

Groep: EMR

Promotoren en begeleiding: prof. Freddy Callens en prof. Nathalie De Geyter

Inlichtingen: tel. 09/264.43.42 of contacteer rechtstreeks een betrokken persoon (de contactgegevens opvragen door op de naam te klikken)

Keywords :

plasma technology, liquid treatment, electrospinning, EPR.

Problem setting :

The aim of this master research is the use of plasma technology for the modification of pre-electrospinning polymeric solutions. Electrospinning, an electrostatic nanofiber fabrication technique, has gained more interest in recent years due to its versatility and potential for applications in diverse fields including tissue engineering, biosensors, filtration, wound dressings, drug delivery and enzyme immobilization. A great challenge in electrospinning is preparing a suitable polymer solution, because the morphology of the resultant nanofibers is highly affected by the polymer solution properties such as polymer concentration, surface tension, viscosity and conductivity. To improve the electrospinnability of polymeric solutions, non-thermal plasmas generated inside and/or above the solutions will be used in this research. The plasma-induced liquid chemistry will be studied in detail using electron paramagnetic resonance (EPR) spectroscopy.

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Goal of the research:

Within this master thesis, we will use a non-thermal plasma jet generated inside and/or on top of polymeric solutions to affect the electrospinnability of the solutions. The influence of plasma treatments on the solution physical characteristics including viscosity, surface tension and conductivity will be analyzed. Moreover, to investigate the characteristics of the plasma itself, optical emission spectroscopy (OES) will be applied. A large part of the research will also be devoted to unravelling which radicals are present in the plasma-treated solutions making use of EPR spectroscopy. Additionally, the stability of the plasma treatment effects can be evaluated with respect to time (aging study) making use of the above-mentioned techniques. Electrospinning of the plasma-treated solutions and subsequent scanning electron microscopy (SEM) measurements on the created nanofibers will also be carried out.

 

Opmerking :

Geen mogelijkheden tot mobiliteit of opname in de Educatieve Master Fysica en Sterrenkunde.