Mechanisms of single-walled carbon nanotube network formation and its configuration in polymer-based nanocomposites

Oseli, Alen (avtor), Vesel, Alenka (avtor), Žagar, Ema (avtor), Slemenik Perše, Lidija (avtor)

The reinforcing and conductive performance of carbon nanotube polymer-based nanocomposites depends on the established network and its configuration. Within this study, we report on the underlying mechanisms of such network formation utilizing single-walled carbon nanotubes (SWCNTs) in low- and high-density polyethylene matrices. Mechanisms were theoretically evaluated through Doi-Edwards theory and experimentally confirmed through plasma etching coupled with electron microscopy as well as rheological flow tests. Results showed that the established network is constructed from SWCNT bundles, which geometrically entangle at a critical volume fraction [phi]v,crit (number of rods: [beta approximately equal to] 30). Below [phi]v,crit, the bundles behave as individual units and may align in the flow direction. Above [phi]v,crit, the rotation of bundles is constrained by neighboring units, leading to a random network configuration. Moreover, the theory successfully explains SWCNT bundle behavior as a Brownian entity and predicts network formation through diminishing thermo- and hydro-dynamically driven diffusion, which can be manipulated during the production to enhance reinforcing/conductive functionality of such materials.

• Jezik: Angleški jezik
• Ključne besede: nanocomposites, single-walled carbon nanotubes, network formation, molecular dynamics, Doi-Edwards theory
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FS - Fakulteta za strojništvo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Poslano v recenzijo: 04.03.2021
• Datum objave: 13.04.2021
• Leto izida: 2021
• Št. strani: Str. 3334-3346
• Številčenje: Vol. 54, iss. 7
• PID: 20.500.12556/RUL-126692
• UDK: 620.168(045)
• ISSN pri članku: 0024-9297
• DOI: 10.1021/acs.macromol.0c02763
• COBISS.SI-ID: 58206467
• Datum objave v RUL: 04.05.2021

Gradivo je del revije

• Naslov: Macromolecules
• Skrajšan naslov: Macromolecules
• Založnik: American Chemical Society
• ISSN: 0024-9297
• COBISS.SI-ID: 25886464

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: 13.04.2021

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: nanokompoziti, eno-stenske ogljikove nano-cevke, nastanek omrežja, molekularna dinamika, Doi-Edwards teorija

Projekti

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: P2-0264
• Naslov: Trajnostni Polimerni materiali in Tehnologije