The Effect of Microcellular Structure on the Dynamic Mechanical Thermal Properties of High-Performance Nanocomposite Foams Made of Graphene Nanoplatelets-Filled Polysulfone
Polysulfone nanocomposite foams containing variable amounts of graphene nanoplatelets (0–10 wt%) were prepared by water vapor-induced phase separation (WVIPS) and supercritical CO<sub>2</sub> (scCO<sub>2</sub>) dissolution. WVIPS foams with two ranges of relative densities we...
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| Format: | Article |
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MDPI AG
2021-01-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/13/3/437 |
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| author | Marcelo Antunes Hooman Abbasi José Ignacio Velasco |
| author_facet | Marcelo Antunes Hooman Abbasi José Ignacio Velasco |
| author_sort | Marcelo Antunes |
| collection | DOAJ |
| description | Polysulfone nanocomposite foams containing variable amounts of graphene nanoplatelets (0–10 wt%) were prepared by water vapor-induced phase separation (WVIPS) and supercritical CO<sub>2</sub> (scCO<sub>2</sub>) dissolution. WVIPS foams with two ranges of relative densities were considered, namely, between 0.23 and 0.41 and between 0.34 and 0.46. Foams prepared by scCO<sub>2</sub> dissolution (0.0–2.0 wt% GnP) were obtained with a relative density range between 0.35 and 0.45. Although the addition of GnP affected the cellular structure of all foams, they had a bigger influence in WVIPS foams. The storage modulus increased for all foams with increasing relative density and GnP’s concentration, except for WVIPS PSU-GnP foams, as they developed open/interconnected cellular structures during foaming. Comparatively, foams prepared by scCO<sub>2</sub> dissolution showed higher specific storage moduli than similar WVIPS foams (same relative density and GnP content), explained by the microcellular structure of scCO<sub>2</sub> foams. As a result of the plasticizing effect of CO<sub>2</sub>, PSU foams prepared by scCO<sub>2</sub> showed lower glass transition temperatures than WVIPS foams, with the two series of these foams displaying decreasing values with incrementing the amount of GnP. |
| first_indexed | 2024-03-09T03:17:26Z |
| format | Article |
| id | doaj.art-e9f32cbde61146678a437f3ffdbce0a2 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-09T03:17:26Z |
| publishDate | 2021-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-e9f32cbde61146678a437f3ffdbce0a22023-12-03T15:17:16ZengMDPI AGPolymers2073-43602021-01-0113343710.3390/polym13030437The Effect of Microcellular Structure on the Dynamic Mechanical Thermal Properties of High-Performance Nanocomposite Foams Made of Graphene Nanoplatelets-Filled PolysulfoneMarcelo Antunes0Hooman Abbasi1José Ignacio Velasco2Department of Materials Science and Engineering, Poly2 Group, Technical University of Catalonia (UPC BarcelonaTech), ESEIAAT, C/Colom 11, 08222 Terrassa, SpainDepartment of Materials Science and Engineering, Poly2 Group, Technical University of Catalonia (UPC BarcelonaTech), ESEIAAT, C/Colom 11, 08222 Terrassa, SpainDepartment of Materials Science and Engineering, Poly2 Group, Technical University of Catalonia (UPC BarcelonaTech), ESEIAAT, C/Colom 11, 08222 Terrassa, SpainPolysulfone nanocomposite foams containing variable amounts of graphene nanoplatelets (0–10 wt%) were prepared by water vapor-induced phase separation (WVIPS) and supercritical CO<sub>2</sub> (scCO<sub>2</sub>) dissolution. WVIPS foams with two ranges of relative densities were considered, namely, between 0.23 and 0.41 and between 0.34 and 0.46. Foams prepared by scCO<sub>2</sub> dissolution (0.0–2.0 wt% GnP) were obtained with a relative density range between 0.35 and 0.45. Although the addition of GnP affected the cellular structure of all foams, they had a bigger influence in WVIPS foams. The storage modulus increased for all foams with increasing relative density and GnP’s concentration, except for WVIPS PSU-GnP foams, as they developed open/interconnected cellular structures during foaming. Comparatively, foams prepared by scCO<sub>2</sub> dissolution showed higher specific storage moduli than similar WVIPS foams (same relative density and GnP content), explained by the microcellular structure of scCO<sub>2</sub> foams. As a result of the plasticizing effect of CO<sub>2</sub>, PSU foams prepared by scCO<sub>2</sub> showed lower glass transition temperatures than WVIPS foams, with the two series of these foams displaying decreasing values with incrementing the amount of GnP.https://www.mdpi.com/2073-4360/13/3/437foamspolysulfonegraphene nanoplateletsviscoelastic behaviormultifunctional |
| spellingShingle | Marcelo Antunes Hooman Abbasi José Ignacio Velasco The Effect of Microcellular Structure on the Dynamic Mechanical Thermal Properties of High-Performance Nanocomposite Foams Made of Graphene Nanoplatelets-Filled Polysulfone Polymers foams polysulfone graphene nanoplatelets viscoelastic behavior multifunctional |
| title | The Effect of Microcellular Structure on the Dynamic Mechanical Thermal Properties of High-Performance Nanocomposite Foams Made of Graphene Nanoplatelets-Filled Polysulfone |
| title_full | The Effect of Microcellular Structure on the Dynamic Mechanical Thermal Properties of High-Performance Nanocomposite Foams Made of Graphene Nanoplatelets-Filled Polysulfone |
| title_fullStr | The Effect of Microcellular Structure on the Dynamic Mechanical Thermal Properties of High-Performance Nanocomposite Foams Made of Graphene Nanoplatelets-Filled Polysulfone |
| title_full_unstemmed | The Effect of Microcellular Structure on the Dynamic Mechanical Thermal Properties of High-Performance Nanocomposite Foams Made of Graphene Nanoplatelets-Filled Polysulfone |
| title_short | The Effect of Microcellular Structure on the Dynamic Mechanical Thermal Properties of High-Performance Nanocomposite Foams Made of Graphene Nanoplatelets-Filled Polysulfone |
| title_sort | effect of microcellular structure on the dynamic mechanical thermal properties of high performance nanocomposite foams made of graphene nanoplatelets filled polysulfone |
| topic | foams polysulfone graphene nanoplatelets viscoelastic behavior multifunctional |
| url | https://www.mdpi.com/2073-4360/13/3/437 |
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