Effect of sonication on thermo-mechanical properties of epoxy nanocomposites with carboxylated-SWNT
| Autor: | Sandro Campos Amico, Luiz A. F. Coelho, Sérgio Henrique Pezzin, Jaqueline Suave |
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| Rok vydání: | 2009 |
| Předmět: |
Materials science
Nanocomposite Mechanical Engineering Sonication Young's modulus Carbon nanotube Dynamic mechanical analysis Epoxy Condensed Matter Physics law.invention symbols.namesake Mechanics of Materials law visual_art Ultimate tensile strength symbols visual_art.visual_art_medium General Materials Science Composite material Glass transition |
| Zdroj: | Materials Science and Engineering: A. 509:57-62 |
| ISSN: | 0921-5093 |
| Popis: | In this work, a 2 k factorial design was used to determine the interaction between sonication time, ultrasound amplitude, and carboxylic-functionalized single-walled carbon nanotubes (c-SWNT) content and their effect on the tensile, dilatometric, and dynamic-mechanical properties of casted epoxy nanocomposites reinforced with c-SWNTs. The nanocomposites were prepared with the help of a solvent (tetrahydrofuran) to reduce resin viscosity. Tensile strength increased with sonication for higher amplitudes and shorter times (20 min). The addition of 0.25 wt% c-SWNT enhanced the mechanical properties, increasing the Young's modulus up to 30% in comparison with neat epoxy prepared under the same conditions. Dilatometry tests showed that shrinkage takes place at the epoxy glass transition, while dynamic-mechanical analyses confirmed the tensile results and suggested that the presence of nanotubes yielded a more homogeneous epoxy resin network, probably due to the minimization of residual solvent. |
| Databáze: | OpenAIRE |
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