1. Vanja Vojnović, Institute of Chemistry, Technology and Metallurgy, University of Belgrade, Belgrade, Serbia, Serbia
2. Marko Spasenović, Institute of Chemistry, Technology and Metallurgy, University of Belgrade, Belgrade, Serbia, Serbia
3. Dana Vasiljević-Radović, Serbia
4. Darko Micić, Serbia
5. Marija Pergal, Institute of Chemistry, Technology and Metallurgy, University of Belgrade, Belgrade, Serbia, Serbia
The versatile chemistry of polyurethanes (PUs) makes them suitable for a wide range of applications. In particular, surface topography and thermal behavior can be effectively tailored by adjusting the soft segment content (SSC) within the PU matrix. However, as an intrinsically nonconductive class of polymers, PUs are not suitable for electronic applications. With the increasing interest in polymer/graphene heterostructures, the formation of graphene conductive pathways on polymer surfaces has emerged as a promising approach to overcome this limitation. In this study, we systematically examined the effects of varying SSC (expressed in wt.%) in synthesized cross-linked PUs, as well as the influence of laser-induced graphene (LIG) transferred onto the PU surface on several key properties: surface roughness via atomic force microscopy (AFM), surface wettability using water contact angle (WCA) measurements, and thermal properties through differential scanning calorimetry (DSC). An increase in SSC led to a reduction in surface roughness and a concomitant increase in WCA, indicating enhanced hydrophobicity. The presence of LIG further augmented the hydrophobic character of the surface. The PU structure exhibited a pronounced effect on both glass transition (Tg) and melting temperatures (Tm), while LIG had a minimal impact on thermal properties. This research provides a framework for engineering the surface and thermal properties of PU-based materials for applications in flexible electronics and smart coatings.
Ključne reči :
Tematska oblast:
SIMPOZIJUM B - Biomaterijali i nanomedicina
Datum:
30.06.2025.
Contemporary Materials 2025 - Savremeni Materijali
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