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Publikācija: Electrospinning of Transparent Polycarbonate/Cerium Oxide Nanoparticles Composite

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Nosaukums oriģinālvalodā Electrospinning of Transparent Polycarbonate/Cerium Oxide Nanoparticles Composite
Pētniecības nozare 2. Inženierzinātnes un tehnoloģijas
Pētniecības apakšnozare 2.5. Materiālzinātne
Autori Claudio Larosa
B. Praminick
Sandra Jēgina
Zane Zelča
Silvija Kukle
N. Bragazzi
Atslēgas vārdi POLYCARBONATE/CERIUM OXIDE NANOPARTICLES COMPOSITE
Anotācija In the current report electrospinning technique was performed, starting from a chlorinate solution of polycarbonate using different proportion to obtain transparent wire in micron scale dimension. Polycarbonate formulations were electro spun from conductive solutions with low viscosity, which offered advantages in terms of new optical transparency pathway in polycarbonate wires. The wires versatility in use was confirmed in the photonics fields1 , blended with fluorescence cyanine organic dyes2 , cotton fibres3 and to favourite remarkable mechanical properties for micro rope applications. The optical stability to the solar spectrum was also improved onto polycarbonate wires, by introduction of amorphous cerium oxide nanoparticles with average size in the range of 28 ± 2 nm. Cerium oxide is included in the lanthanide group and due its peculiar electronic configuration with its last d orbital state offer significant advantage to retard on small fibres damage effects caused by infrared radiations of solar spectrum. However, the dispersion of naked nanoparticles remains a critical problem to reduce due to well-known low range attraction force, which induce particles agglomeration behaviour as well as the fast dissolving and rapidly solvent evaporation. Another interesting aspect has been considered during formulation of wire was the amorphous polycarbonate state, which may change during the fast solvent evaporation or by induction with nanoparticles.4 It is present as an amorphous polymer with 2-3 % of crystalline domine. This last matter state condition was avoided to preserve the light transparency; for this reason a parametric approach in electrospinning which involves: voltage, concentration, electrode distance was formulated. Fibres spinning by using a tip electrode and second electrode surface were collect on glass and characterize by infrared absorption in the UV-vis spectroscopy with also AFM characterization. The stability of these micro fibres to the UV light with different polycarbonate/cerium oxide nanoparticles molar ratio were simulated by exposure to the UV lamp by an constant surface irradiation for 12, 24, 36 and 72 hours. Preliminary results acquire by using a UV lamp shown a significant increase of stability in wires polycarbonate composite with cerium oxide 5-10-15% of inclusion.
Hipersaite: http://www.mpm2016.pl/images/PDF/Book%20of%20abstracts_MPM2016.pdf 
Atsauce Larosa, C., Praminick, B., Jēgina, S., Zelča, Z., Kukle, S., Bragazzi, N. Electrospinning of Transparent Polycarbonate/Cerium Oxide Nanoparticles Composite. No: 6th International Seminar on Modern Polymeric Materials for Environmental Applications including COST MP1206 Workshop “Electrospinning vs Traditional Polymer Processing Method: Comparison of Innovative Technical Applications”: Book of Abstracts, Polija, Cracow, 27.-29. aprīlis, 2016. Cracow: Cracow University of Technology, 2016, 19.-19.lpp.
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