Nano-mesh superstructure in single-walled carbon nanotube/polyethylene nanocomposites, and its impact on rheological, thermal and mechanical properties
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.
2020
2020-05-27 12:26:50
1033
nanocomposites, nano-structures, physical properties, physical methods of analysis
nanokompoziti, nano-strukture, fizikalne lastnosti, metode fizikalnih analiz
dk_c
Alen
Oseli
70
Alenka
Vesel
70
Miran
Mozetič
70
Ema
Žagar
70
Miroslav
Huskić
70
Lidija
Slemenik Perše
70
UDK
4
620.3(045)
ISSN pri članku
9
1359-835X
DOI
15
10.1016/j.compositesa.2020.105972
COBISS_ID
3
17053187
RAZ_Oseli_Alen_2020.pdf
3740974
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2021-04-16 21:49:45
0
Izvorni URL
2020-05-27 12:26:57