Physical hybrid of nanographene/carbon nanotubes as reinforcing gents of NR-based rubber foam
| Autor: | Elnaz Esmizadeh, Ali Vahidifar, Ghasem Naderi, Sahar Shojaie, Elham Shokri, Tizazu H. Mekonnen |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Polymers and Plastics Polymer nanocomposite Nucleation Organic chemistry Compression molding Modulus natural rubber 02 engineering and technology Carbon nanotube 010402 general chemistry 01 natural sciences Article law.invention polymer nanocomposites QD241-441 Natural rubber law Composite material mechanical response Curing (chemistry) Nanocomposite rubber foam General Chemistry hybrid nanofillers 021001 nanoscience & nanotechnology 0104 chemical sciences visual_art visual_art.visual_art_medium 0210 nano-technology |
| Zdroj: | Polymers Polymers, Vol 13, Iss 2346, p 2346 (2021) Volume 13 Issue 14 |
| Popis: | Natural rubber (NR) foams reinforced by a physical hybrid of nanographene/carbon nanotubes were fabricated using a two-roll mill and compression molding process. The effects of nanographene (GNS) and carbon nanotubes (CNT) were investigated on the curing behavior, foam morphology, and mechanical and thermal properties of the NR nanocomposite foams. Microscope investigations showed that the GNS/CNT hybrid fillers acted as nucleation agents and increased the cell density and decreased the cell size and wall thickness. Simultaneously, the cell size distribution became narrower, containing more uniform multiple closed-cell pores. The rheometric results showed that the GNS/CNT hybrids accelerated the curing process and decreased the scorch time from 6.81 to 5.08 min and the curing time from 14.3 to 11.12 min. Other results showed that the GNS/CNT hybrid improved the foam’s curing behavior. The degradation temperature of the nanocomposites at 5 wt.% and 50 wt.% weight loss increased from 407 °C to 414 °C and from 339 °C to 346 °C, respectively, and the residual ash increased from 5.7 wt.% to 12.23 wt.% with increasing hybrid nanofiller content. As the amount of the GNS/CNT hybrids increased in the rubber matrix, the modulus also increased, and the Tg increased slightly from −45.77 °C to −38.69 °C. The mechanical properties of the NR nanocomposite foams, including the hardness, resilience, and compression, were also improved by incorporating GNS/CNT hybrid fillers. Overall, the incorporation of the nano hybrid fillers elevated the desirable properties of the rubber foam. |
| Databáze: | OpenAIRE |
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