Alen Oseli (Author), Alenka Vesel (Author), Miran Mozetič (Author), Ema Žagar (Author), Miroslav Huskić (Author), Lidija Slemenik Perše (Author)

Abstract

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;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL FS - Faculty of Mechanical Engineering
UDC: 620.3(045)
COBISS: 17053187 Link will open in a new window
ISSN: 1359-835X
Views: 679
Downloads: 403
Average score: 0 (0 votes)
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Other data

Secondary language: Slovenian
Secondary keywords: nanokompoziti;nano-strukture;fizikalne lastnosti;metode fizikalnih analiz;
Type (COBISS): Article
Pages: str. 1-10
Issue: ǂVol. ǂ 136
Chronology: Sep. 2020
DOI: 10.1016/j.compositesa.2020.105972
ID: 11752594