Titania-doped multi-walled carbon nanotubes epoxy composites: Enhanced dispersion and synergistic effects in multiphase nanocomposites
| Autor: | Montira Sriyai, Luis A. S. de A. Prado, Jan Sumfleth, Karl Schulte |
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| Rok vydání: | 2008 |
| Předmět: |
Nanocomposite
Materials science Polymers and Plastics Organic Chemistry Nanoparticle chemistry.chemical_element Epoxy Carbon nanotube Microstructure law.invention chemistry law visual_art Materials Chemistry visual_art.visual_art_medium Composite material Dispersion (chemistry) Glass transition Carbon |
| Zdroj: | Polymer. 49:5105-5112 |
| ISSN: | 0032-3861 |
| DOI: | 10.1016/j.polymer.2008.09.016 |
| Popis: | Multi-walled carbon nanotube-epoxy composites are modified with titania nanoparticles in order to obtain multiphase nanocomposites with an enhanced dispersion of carbon nanotubes. The dispersion is monitored using rheological and electrical conductivity measurements. An increase in dispersion quality can be correlated to an increased storage shear modulus of the uncured suspensions and to a decreased electrical conductivity in the bulk nanocomposite. The newly formed microstructure is revealed using transmission electron and optical microscopies. Due to chemical interactions between both types of nanoparticles an attractive potential is generated leading to a significant rearrangement in the particle network structure. Besides an enhanced dispersion, the hybrid structure leads to synergistic effects in terms of the glass transition of the nanocomposites. Although a decrease of the glass transition temperature (Tg) is observed for the nanocomposites containing only one type of filler, the combination of titania and carbon nanotubes into a hybrid structure reduces the decrease of Tg, thus demonstrating the potential of such hybrid structures as fillers for multi-functional epoxy nanocomposites. |
| Databáze: | OpenAIRE |
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