Insight into the surface properties of wood fiber-polymer composites

Pušnik Črešnar, Klementina (avtor), Bek, Marko (avtor), Luxbacher, Thomas (avtor), Brunčko, Mihael (avtor), Fras Zemljič, Lidija (avtor)

The surface properties of wood fiber (WF) filled polymer composites depend on the filler loading and are closely related to the distribution and orientation in the polymer matrix. In this study, wood fibers (WF) were incorporated into thermoplastic composites based on non-recycled polypropylene (PP) and recycled (R-PP) composites by melt compounding and injection moulding. ATR-FTIR (attenuated total reflection Fourier transform infrared spectroscopy) measurements clearly showed the propagation of WF functional groups at the surface layer of WF-PP/WF-R-PP composites preferentially with WF loading up to 30%. Optical microscopy and nanoindentation method confirmed the alignment of thinner skin layer of WF-PP/WF-R-PP composites with increasing WF addition. The thickness of the skin layer was mainly influenced by the WF loading. The effect of the addition of WF on modulus and hardness, at least at 30 and 40 wt.%, varies for PP and R-PP matrix. On the other hand, surface zeta potential measurements show increased hydrophilicity with increasing amounts of WF. Moreover, WF in PP/R-PP matrix is also responsible for the antioxidant properties of these composites as measured by DPPH (2,2′-diphenyl-1-picrylhydrazyl) assay.

• Jezik: Angleški jezik
• Ključne besede: wood-fibers polypropylene composites, surface properties, skin-core structure, sustainable and biodegradable composites, ATR-FTIR, zeta potential measurement, nanoindentation, DPPH assay
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FS - Fakulteta za strojništvo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2021
• Št. strani: 24 str.
• Številčenje: Vol. 13, iss. 10, art. 1535
• PID: 20.500.12556/RUL-127415
• UDK: 677.017:544.7
• ISSN pri članku: 2073-4360
• DOI: 10.3390/polym13101535
• COBISS.SI-ID: 62964739
• Datum objave v RUL: 04.06.2021

Gradivo je del revije

• Naslov: Polymers
• Skrajšan naslov: Polymers
• Založnik: Molecular Diversity Preservation International
• ISSN: 2073-4360
• COBISS.SI-ID: 517951257

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
• Začetek licenciranja: 11.05.2021

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: lesna vlakna, polipropilenski kompoziti, površinske lastnosti vlaken, struktura skorja-jedro, biorazgradljivi kompoziti, meritve zeta potenciala, nanovtiskovanje