Nano-mesh superstructure in single-walled carbon nanotube/polyethylene nanocomposites, and its impact on rheological, thermal and mechanical properties
Oseli, Alen (Author), Vesel, Alenka (Author), Mozetič, Miran (Author), Žagar, Ema (Author), Huskić, Miroslav (Author), Slemenik Perše, Lidija (Author)

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The mesh formation of single-walled carbon nanotube (SWCNT) superstructure, i.e. nano-mesh, in low- and high-density polyethylene (LDPE and HDPE) matrices was observed by using plasma etching technique and SEM analysis. Nano-mesh was established by two mechanisms: i) alignment of SWCNT bundles (forming network backbone) and ii) shish-kebab induced crystallization (forming network net). The network was formed at low SWCNT content due to the high aspect ratio of nano-filler, which additionally contributed to alignment. Established nano-mesh superstructure caused confinement effect disrupting crystallization and melting kinetics, which directly affected mechanical properties. Although mechanical properties of LDPE and HDPE nanocomposites profoundly improved, i.e. Young%s modulus increased for 230% and 30%, respectively, at only 1 wt% of SWCNTs, HDPE nanocomposites showed visible confinement that reduced effective reinforcement. It seems that HDPE nanocomposites cannot achieve full reinforcing potential since confinement effect restricts the crystal growth, which gradually reduces effective reinforcement in semi-dilute regime.

Keywords:nanocomposites, nano-structures, physical properties, physical methods of analysis
Tipology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Number of pages:str. 1-10
Numbering:Vol. 136
ISSN on article:1359-835X
DOI:10.1016/j.compositesa.2020.105972 Link is opened in a new window
COBISS.SI-ID:17053187 Link is opened in a new window
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Document is financed by a project

Funder:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Project no.:P2-0264
Name:Trajnostni Polimerni materiali in Tehnologije

Funder:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Project no.:P2-0145
Name:Polimeri in polimerni materiali s posebnimi lastnostmi

Project no.:OP20.00369

Secondary language

Keywords:nanokompoziti, nano-strukture, fizikalne lastnosti, metode fizikalnih analiz

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