Nanocomposite of Poly(l-Lactic Acid) with Inorganic Nanotubes of WS2
| Autor: | XiaoMeng Sui, Noa Lachman, Reshef Tenne, Hanoch Daniel Wagner, Hila Shalom, Iddo Pinkas, Olga Elianov, Rita Rosentsveig, Nir Kampf, Vlad Brumfeld, Yishay Feldman |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
viruses Tungsten disulfide Nanoparticle Context (language use) inorganic nanotubes 02 engineering and technology 010402 general chemistry 01 natural sciences PLLA chemistry.chemical_compound lcsh:Science chemistry.chemical_classification Nanocomposite Rheometry Mechanical Engineering Polymer Polyethylene 021001 nanoscience & nanotechnology equipment and supplies solid lubricants 0104 chemical sciences Surfaces Coatings and Films chemistry Chemical engineering lcsh:Q 0210 nano-technology Dispersion (chemistry) |
| Zdroj: | Lubricants, Vol 7, Iss 3, p 28 (2019) Lubricants Volume 7 Issue 3 |
| ISSN: | 2075-4442 |
| Popis: | Composites of poly(l-lactic acid) (PLLA) reinforced by adding inorganic nanotubes of tungsten disulfide (INT&ndash WS2) were prepared by solvent casting. In addition to the pristine nanotubes, PLLA nanocomposites containing surface modified nanotubes were studied as well. Several surface-active agents, including polyethylene imine (PEI), were studied in this context. In addition, other biocompatible polymers, like poly d,l-lactic acid (PDLLA) and others were considered in combination with the INT&ndash WS2. The nanotubes were added to the polymer in different proportions up to 3 wt %. The dispersion of the nanotubes in the nanocomposites were analyzed by several techniques, including X-ray tomography microscopy (Micro-XCT). Moreover, high-temperature rheological measurements of the molten polymer were conducted. In contrast to other nanoparticles, which lead to a considerable increase of the viscosity of the molten polymer, the WS2 nanotubes did not affect the viscosity significantly. They did not affect the complex viscosity of the molten PLLA phase, either. The mechanical and tribological properties of the nanocomposites were found to improve considerably by adding the nanotubes. A direct correlation was observed between the dispersion of the nanotubes in the polymer matrix and its mechanical properties. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|