Hybrid Structures Made of Polyurethane/Graphene Nanocomposite Foams Embedded within Aluminum Open-Cell Foam
This paper focuses on the development of hybrid structures containing two different classes of porous materials, nanocomposite foams made of polyurethane combined with graphene-based materials, and aluminum open-cell foams (Al-OC). Prior to the hybrid structures preparation, the nanocomposite foam f...
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MDPI AG
2020-06-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/10/6/768 |
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| author | Susana C. Pinto Paula A. A. P. Marques Romeu Vicente Luís Godinho Isabel Duarte |
| author_facet | Susana C. Pinto Paula A. A. P. Marques Romeu Vicente Luís Godinho Isabel Duarte |
| author_sort | Susana C. Pinto |
| collection | DOAJ |
| description | This paper focuses on the development of hybrid structures containing two different classes of porous materials, nanocomposite foams made of polyurethane combined with graphene-based materials, and aluminum open-cell foams (Al-OC). Prior to the hybrid structures preparation, the nanocomposite foam formulation was optimized. The optimization consisted of studying the effect of the addition of graphene oxide (GO) and graphene nanoplatelets (GNPs) at different loadings (1.0, 2.5 and 5.0 wt%) during the polyurethane foam (PUF) formation, and their effect on the final nanocomposite properties. Globally, the results showed enhanced mechanical, acoustic and fire-retardant properties of the PUF nanocomposites when compared with pristine PUF. In a later step, the hybrid structure was prepared by embedding the Al-OC foam with the optimized nanocomposite formulation (prepared with 2.5 wt% of GNPs (PUF/GNPs2.5)). The process of filling the pores of the Al-OC was successfully achieved, with the resulting hybrid structure retaining low thermal conductivity values, around 0.038 W∙m<sup>−1</sup>∙K<sup>−1</sup>, and presenting an improved sound absorption coefficient, especially for mid to high frequencies, with respect to the individual foams. Furthermore, the new hybrid structure also displayed better mechanical properties (the stress corresponding to 10% of deformation was improved in more than 10 and 1.3 times comparatively to PUF/GNPs2.5 and Al-OC, respectively). |
| first_indexed | 2024-03-10T19:17:18Z |
| format | Article |
| id | doaj.art-c95741c85a344919b6173d926b75ed48 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T19:17:18Z |
| publishDate | 2020-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-c95741c85a344919b6173d926b75ed482023-11-20T03:16:11ZengMDPI AGMetals2075-47012020-06-0110676810.3390/met10060768Hybrid Structures Made of Polyurethane/Graphene Nanocomposite Foams Embedded within Aluminum Open-Cell FoamSusana C. Pinto0Paula A. A. P. Marques1Romeu Vicente2Luís Godinho3Isabel Duarte4Department of Mechanical Engineering, TEMA, University of Aveiro, 3810-193 Aveiro, PortugalDepartment of Mechanical Engineering, TEMA, University of Aveiro, 3810-193 Aveiro, PortugalDepartment of Civil Engineering, RISCO, University of Aveiro, 3810-193 Aveiro, PortugalDepartment of Civil Engineering, ISISE, University of Coimbra, 3030-788 Coimbra, PortugalDepartment of Mechanical Engineering, TEMA, University of Aveiro, 3810-193 Aveiro, PortugalThis paper focuses on the development of hybrid structures containing two different classes of porous materials, nanocomposite foams made of polyurethane combined with graphene-based materials, and aluminum open-cell foams (Al-OC). Prior to the hybrid structures preparation, the nanocomposite foam formulation was optimized. The optimization consisted of studying the effect of the addition of graphene oxide (GO) and graphene nanoplatelets (GNPs) at different loadings (1.0, 2.5 and 5.0 wt%) during the polyurethane foam (PUF) formation, and their effect on the final nanocomposite properties. Globally, the results showed enhanced mechanical, acoustic and fire-retardant properties of the PUF nanocomposites when compared with pristine PUF. In a later step, the hybrid structure was prepared by embedding the Al-OC foam with the optimized nanocomposite formulation (prepared with 2.5 wt% of GNPs (PUF/GNPs2.5)). The process of filling the pores of the Al-OC was successfully achieved, with the resulting hybrid structure retaining low thermal conductivity values, around 0.038 W∙m<sup>−1</sup>∙K<sup>−1</sup>, and presenting an improved sound absorption coefficient, especially for mid to high frequencies, with respect to the individual foams. Furthermore, the new hybrid structure also displayed better mechanical properties (the stress corresponding to 10% of deformation was improved in more than 10 and 1.3 times comparatively to PUF/GNPs2.5 and Al-OC, respectively).https://www.mdpi.com/2075-4701/10/6/768open-cell foampolyurethane foamhybrid structuresgraphene-based materialsnanocomposites |
| spellingShingle | Susana C. Pinto Paula A. A. P. Marques Romeu Vicente Luís Godinho Isabel Duarte Hybrid Structures Made of Polyurethane/Graphene Nanocomposite Foams Embedded within Aluminum Open-Cell Foam Metals open-cell foam polyurethane foam hybrid structures graphene-based materials nanocomposites |
| title | Hybrid Structures Made of Polyurethane/Graphene Nanocomposite Foams Embedded within Aluminum Open-Cell Foam |
| title_full | Hybrid Structures Made of Polyurethane/Graphene Nanocomposite Foams Embedded within Aluminum Open-Cell Foam |
| title_fullStr | Hybrid Structures Made of Polyurethane/Graphene Nanocomposite Foams Embedded within Aluminum Open-Cell Foam |
| title_full_unstemmed | Hybrid Structures Made of Polyurethane/Graphene Nanocomposite Foams Embedded within Aluminum Open-Cell Foam |
| title_short | Hybrid Structures Made of Polyurethane/Graphene Nanocomposite Foams Embedded within Aluminum Open-Cell Foam |
| title_sort | hybrid structures made of polyurethane graphene nanocomposite foams embedded within aluminum open cell foam |
| topic | open-cell foam polyurethane foam hybrid structures graphene-based materials nanocomposites |
| url | https://www.mdpi.com/2075-4701/10/6/768 |
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