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https://doi.org/10.5562/cca3141

Effect of Micro and Nano TiO2 on UV Degradation behavior of TiO2 Reinforced Polycaprolactone Composites

Emi Govorčin Bajsić orcid id orcid.org/0000-0002-0421-8264 ; University of Zagreb, Faculty of Chemical Engineering and Technology, Marulićev trg 19, HR-10000 Zagreb, Croatia
Veljko Filipan orcid id orcid.org/0000-0003-2731-8935 ; University of Zagreb, Faculty of Chemical Engineering and Technology, Marulićev trg 19, HR-10000 Zagreb, Croatia
Tamara Grgurić Holjevac ; University of Zagreb, Faculty of Metallurgy, Aleja narodnih heroja 3, HR-44103 Sisak, Croatia
Vedrana Grozdanić ; Research Center for Materials of Region of Istria METRIS, Zagrebačka 30, 52100 Pula, Croatia


Puni tekst: engleski pdf 6.496 Kb

str. 297-306

preuzimanja: 1.101

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Sažetak

In this work the influence of micro and nano titanium dioxide (TiO2) particles on the properties of polycaprolactone (PCL) based composites before and after UV radiation was investigated. The neat PCL and PCL / TiO2 micro and nanocomposites were radiated for 120 and 240h. DSC analysis showed that the melting temperature (Tm) decreased while the crystallization temperature (Tc) and degree of crystallinity (χc) increased when the composites were exposed to UV radiation. DMA analysis showed that the glass transition temperature (Tg) increased after UV irradiation. The addition of fillers leads to an increase in the initial weight loss (5 wt %) which decreases by time of exposing the samples to UV radiation. SEM showed that the addition of micro and nano TiO2 promote UV degradation of polymer matrix after 120 and 240 h degradation. The results of FTIR spectroscopy confirmed that the micro and nano TiO2 enhance the degradation process because of their photocatalytic activity. The PCL / TiO2 microcomposites showed higher changes in all investigated properties after UV radiation compared to the PCL / TiO2 nanocomposites.

This work is licensed under a Creative Commons Attribution 4.0 International License.

Ključne riječi

particle-reinforced composites, nanocomposites, thermal properties, thermomechanical properties, UV radiation

Hrčak ID:

185993

URI

https://hrcak.srce.hr/185993

Posjeta: 1.412 *