Nano-mesh superstructure in single-walled carbon nanotube/polyethylene nanocomposites, and its impact on rheological, thermal and mechanical properties
Povzetek
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.
Ključne besede
nanocomposites;nano-structures;physical properties;physical methods of analysis;
Podatki
| Jezik: | Angleški jezik |
|---|---|
| Leto izida: | 2020 |
| Tipologija: | 1.01 - Izvirni znanstveni članek |
| Organizacija: | UL FS - Fakulteta za strojništvo |
| UDK: | 620.3(045) |
| COBISS: |
17053187
|
| ISSN: | 1359-835X |
| Št. ogledov: | 679 |
| Št. prenosov: | 403 |
| Ocena: | 0 (0 glasov) |
| Metapodatki: |
|
Ostali podatki
| Sekundarni jezik: | Slovenski jezik |
|---|---|
| Sekundarne ključne besede: | nanokompoziti;nano-strukture;fizikalne lastnosti;metode fizikalnih analiz; |
| Vrsta dela (COBISS): | Članek v reviji |
| Strani: | str. 1-10 |
| Zvezek: | ǂVol. ǂ 136 |
| Čas izdaje: | Sep. 2020 |
| DOI: | 10.1016/j.compositesa.2020.105972 |
| ID: | 11752594 |
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