Graphite Nanoplatelets Nanostructured Films as Multifunctional Protective Layer in Kevlar/Nomex Sandwich Composites
In the aerospace sector, structural and non-structural composite components are usually subjected to a wide range of environmental conditions. Among all, moisture can seriously damage these materials’ performance, reducing their mechanical, thermal, electrical, and physical properties as well as the...
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| Format: | Article |
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MDPI AG
2023-11-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/13/23/12812 |
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| author | Fabrizia Cilento Barbara Palmieri Giovangiuseppe Giusto Ruggiero Volponi Giovanni Bruno Carmine Carandente Tartaglia Cinzia Toscano Michele Giordano Alfonso Martone |
| author_facet | Fabrizia Cilento Barbara Palmieri Giovangiuseppe Giusto Ruggiero Volponi Giovanni Bruno Carmine Carandente Tartaglia Cinzia Toscano Michele Giordano Alfonso Martone |
| author_sort | Fabrizia Cilento |
| collection | DOAJ |
| description | In the aerospace sector, structural and non-structural composite components are usually subjected to a wide range of environmental conditions. Among all, moisture can seriously damage these materials’ performance, reducing their mechanical, thermal, electrical, and physical properties as well as their service time. Lightweight protective barrier coatings capable of reducing the diffusion of gases and/or liquids in a material can improve the material’s resistance in humid environments. In this work, nanolamellar nanocomposites characterized by a high in-plane orientation of nanoplatelets have been employed as protective coatings for Kevlar sandwich panels, reproducing the construction of a nacelle engine. The effectiveness of the protection against water uptake of nanocomposites reinforced with graphite nanoplatelets (GNPs) at high filler contents (70, 80 and 90 wt%) has been investigated using moisture uptake and Ground-Air-Ground (GAG) tests in an environmental chamber. GNP coatings effectively work as barrier by generating highly tortuous paths for molecule diffusion. Results showed a dependence of the absorption on the coating composition and inner structure. Films @70 wt% GNPs showed the best protection against moisture uptake by delaying the phenomenon and reducing the absorption by −80% after 3 days and −35% after 41 days. |
| first_indexed | 2024-03-09T01:54:25Z |
| format | Article |
| id | doaj.art-0053e87db9d04809956e3fac16f54ee9 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T01:54:25Z |
| publishDate | 2023-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-0053e87db9d04809956e3fac16f54ee92023-12-08T15:11:47ZengMDPI AGApplied Sciences2076-34172023-11-0113231281210.3390/app132312812Graphite Nanoplatelets Nanostructured Films as Multifunctional Protective Layer in Kevlar/Nomex Sandwich CompositesFabrizia Cilento0Barbara Palmieri1Giovangiuseppe Giusto2Ruggiero Volponi3Giovanni Bruno4Carmine Carandente Tartaglia5Cinzia Toscano6Michele Giordano7Alfonso Martone8Institute of Polymers, Composite and Biomaterials (IPCB), National Research Council of Italy, 80055 Portici, ItalyInstitute of Polymers, Composite and Biomaterials (IPCB), National Research Council of Italy, 80055 Portici, ItalyCIRA, Italian Aerospace Research Centre, 81043 Capua, ItalyCIRA, Italian Aerospace Research Centre, 81043 Capua, ItalyCIRA, Italian Aerospace Research Centre, 81043 Capua, ItalyCIRA, Italian Aerospace Research Centre, 81043 Capua, ItalyCIRA, Italian Aerospace Research Centre, 81043 Capua, ItalyInstitute of Polymers, Composite and Biomaterials (IPCB), National Research Council of Italy, 80055 Portici, ItalyInstitute of Polymers, Composite and Biomaterials (IPCB), National Research Council of Italy, 80055 Portici, ItalyIn the aerospace sector, structural and non-structural composite components are usually subjected to a wide range of environmental conditions. Among all, moisture can seriously damage these materials’ performance, reducing their mechanical, thermal, electrical, and physical properties as well as their service time. Lightweight protective barrier coatings capable of reducing the diffusion of gases and/or liquids in a material can improve the material’s resistance in humid environments. In this work, nanolamellar nanocomposites characterized by a high in-plane orientation of nanoplatelets have been employed as protective coatings for Kevlar sandwich panels, reproducing the construction of a nacelle engine. The effectiveness of the protection against water uptake of nanocomposites reinforced with graphite nanoplatelets (GNPs) at high filler contents (70, 80 and 90 wt%) has been investigated using moisture uptake and Ground-Air-Ground (GAG) tests in an environmental chamber. GNP coatings effectively work as barrier by generating highly tortuous paths for molecule diffusion. Results showed a dependence of the absorption on the coating composition and inner structure. Films @70 wt% GNPs showed the best protection against moisture uptake by delaying the phenomenon and reducing the absorption by −80% after 3 days and −35% after 41 days.https://www.mdpi.com/2076-3417/13/23/12812graphite nanoplateletsmoisture uptakebarrier properties |
| spellingShingle | Fabrizia Cilento Barbara Palmieri Giovangiuseppe Giusto Ruggiero Volponi Giovanni Bruno Carmine Carandente Tartaglia Cinzia Toscano Michele Giordano Alfonso Martone Graphite Nanoplatelets Nanostructured Films as Multifunctional Protective Layer in Kevlar/Nomex Sandwich Composites Applied Sciences graphite nanoplatelets moisture uptake barrier properties |
| title | Graphite Nanoplatelets Nanostructured Films as Multifunctional Protective Layer in Kevlar/Nomex Sandwich Composites |
| title_full | Graphite Nanoplatelets Nanostructured Films as Multifunctional Protective Layer in Kevlar/Nomex Sandwich Composites |
| title_fullStr | Graphite Nanoplatelets Nanostructured Films as Multifunctional Protective Layer in Kevlar/Nomex Sandwich Composites |
| title_full_unstemmed | Graphite Nanoplatelets Nanostructured Films as Multifunctional Protective Layer in Kevlar/Nomex Sandwich Composites |
| title_short | Graphite Nanoplatelets Nanostructured Films as Multifunctional Protective Layer in Kevlar/Nomex Sandwich Composites |
| title_sort | graphite nanoplatelets nanostructured films as multifunctional protective layer in kevlar nomex sandwich composites |
| topic | graphite nanoplatelets moisture uptake barrier properties |
| url | https://www.mdpi.com/2076-3417/13/23/12812 |
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