Release mechanisms for PA6 nanocomposites under weathering conditions simulating their outdoor uses
| Autor: | Vicenç Pomar-Portillo, Elisabet Fernández-Rosas, Gemma Vilar, David González-Gálvez, Socorro Vázquez-Campos |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Nanocomposite Polymer nanocomposite Materials Science (miscellaneous) Public Health Environmental and Occupational Health Weathering 02 engineering and technology 010501 environmental sciences 021001 nanoscience & nanotechnology Multiwalled carbon 01 natural sciences Nanomaterials Hydrolysis Polymer degradation Chemical engineering Polyamide 0210 nano-technology Safety Risk Reliability and Quality Safety Research 0105 earth and related environmental sciences |
| Zdroj: | NanoImpact. 20:100260 |
| ISSN: | 2452-0748 |
| DOI: | 10.1016/j.impact.2020.100260 |
| Popis: | The increased use of polymer nanocomposites in different applications could lead to potential nanofiller release into different human and environmental compartments and consequently, increase the exposure of human and environmental species to nanomaterials. This study aims at determining how the inclusion of nanofillers with diverse chemical nature (SiO2, TiO2, ZnO, multiwalled carbon nanotubes and two nano-organoclays) in polyamide 6 composites influences the nanomaterial release during the use of these products. The different nanocomposites were exposed to accelerated ageing processes, simulating outdoor conditions, through irradiation with UV light under a combination of dry-wet cycles. Release monitoring consisted of nanocomposites characterisation, run-off waters collection and released materials quantification and characterisation. The study confirmed that the chemical surface nature of the nanofiller strongly impacts on polymer degradation, in some cases enhancing its protection and in others promoting polyamide hydrolysis and/or photo-degradation processes. Polymer degradation and nanomaterial-polymer compatibility are the main determinants for the release and consequent exposure to nanofillers. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect