Investigating EMI shielding performance of recycled polypropylene (PP) composite foams with reused metal powders
Secondary raw materials, recycled Polypropylene (PP) and metal powders retrieved after use in the Powder Bed Fusion-Laser Beam process, are used to realize composite foams for microwave absorptance through chemical foaming. Morphological characterization allowed us to estimate foams’ relative densit...
Saved in:
| Main Authors: | , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-06-01
|
| Series: | Materials & Design |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S026412752500526X |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849331232757776384 |
|---|---|
| author | Valeria Marrocco Rossella Surace Elisabetta Brandonisio Ilaria Marasco Claudia Pagano Cinzia Tonetti Vito Errico Giovanna Calò Sabina L. Campanelli Irene Fassi |
| author_facet | Valeria Marrocco Rossella Surace Elisabetta Brandonisio Ilaria Marasco Claudia Pagano Cinzia Tonetti Vito Errico Giovanna Calò Sabina L. Campanelli Irene Fassi |
| author_sort | Valeria Marrocco |
| collection | DOAJ |
| description | Secondary raw materials, recycled Polypropylene (PP) and metal powders retrieved after use in the Powder Bed Fusion-Laser Beam process, are used to realize composite foams for microwave absorptance through chemical foaming. Morphological characterization allowed us to estimate foams’ relative density, cell size, distribution, and circularity. The results highlighted that metal powders contributed to air cell nucleation during the process, thus influencing the final foam morphology. Then, numerical analyses were conducted on modeled PP foams to calculate Scattering (S) parameters and Shielding Effectiveness (SE), varying air cell areas, shapes, metal particle distribution, and evaluating their impacts on EM response. Based on simulation results, the S-parameters of all samples were then measured in the X-band. The calculated SE contributions, SER and SEA, showed that foams with virgin and reused metal powders behave very similarly. Finally, four samples foamed from extruded pellets were characterized morphologically and electromagnetically. The outcomes showed extruded-based foams had a slightly decreased relative density, increased air cell numbers with lower circularity, and better uniformity in the air cell distributions. Confronting SE contributions in the X-band, SEA improved by about 10%-20% compared to the mixed samples. |
| format | Article |
| id | doaj-art-b9f15e95bef846b89080a1c46694c4d2 |
| institution | Kabale University |
| issn | 0264-1275 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj-art-b9f15e95bef846b89080a1c46694c4d22025-08-20T03:46:41ZengElsevierMaterials & Design0264-12752025-06-0125411410610.1016/j.matdes.2025.114106Investigating EMI shielding performance of recycled polypropylene (PP) composite foams with reused metal powdersValeria Marrocco0Rossella Surace1Elisabetta Brandonisio2Ilaria Marasco3Claudia Pagano4Cinzia Tonetti5Vito Errico6Giovanna Calò7Sabina L. Campanelli8Irene Fassi9CNR-STIIMA Institute of Intelligent Industrial Technologies and Systems for Advanced Manufacturing, Via P. Lembo 38F, 70124 Bari, ItalyCNR-STIIMA Institute of Intelligent Industrial Technologies and Systems for Advanced Manufacturing, Via P. Lembo 38F, 70124 Bari, Italy; Corresponding author.CNR-STIIMA Institute of Intelligent Industrial Technologies and Systems for Advanced Manufacturing, Via P. Lembo 38F, 70124 Bari, ItalyPolitecnico di Bari, Department of Electric and Information Engineering, Via E. Orabona 4, 70126 Bari, ItalyCNR-STIIMA Institute of Intelligent Industrial Technologies and Systems for Advanced Manufacturing, Via A. Corti 12, 20133 Milano, ItalyCNR-STIIMA Institute of Intelligent Industrial Technologies and Systems for Advanced Manufacturing, Corso G. Pella 16, 13900 Biella, ItalyPolitecnico di Bari, Department of Mechanics, Mathematics and Management, Via E. Orabona 4, 70126 Bari, ItalyPolitecnico di Bari, Department of Electric and Information Engineering, Via E. Orabona 4, 70126 Bari, ItalyPolitecnico di Bari, Department of Mechanics, Mathematics and Management, Via E. Orabona 4, 70126 Bari, ItalyCNR-STIIMA Institute of Intelligent Industrial Technologies and Systems for Advanced Manufacturing, Via A. Corti 12, 20133 Milano, ItalySecondary raw materials, recycled Polypropylene (PP) and metal powders retrieved after use in the Powder Bed Fusion-Laser Beam process, are used to realize composite foams for microwave absorptance through chemical foaming. Morphological characterization allowed us to estimate foams’ relative density, cell size, distribution, and circularity. The results highlighted that metal powders contributed to air cell nucleation during the process, thus influencing the final foam morphology. Then, numerical analyses were conducted on modeled PP foams to calculate Scattering (S) parameters and Shielding Effectiveness (SE), varying air cell areas, shapes, metal particle distribution, and evaluating their impacts on EM response. Based on simulation results, the S-parameters of all samples were then measured in the X-band. The calculated SE contributions, SER and SEA, showed that foams with virgin and reused metal powders behave very similarly. Finally, four samples foamed from extruded pellets were characterized morphologically and electromagnetically. The outcomes showed extruded-based foams had a slightly decreased relative density, increased air cell numbers with lower circularity, and better uniformity in the air cell distributions. Confronting SE contributions in the X-band, SEA improved by about 10%-20% compared to the mixed samples.http://www.sciencedirect.com/science/article/pii/S026412752500526XRecycled polymersReused metal powdersFoaming processEMI shielding |
| spellingShingle | Valeria Marrocco Rossella Surace Elisabetta Brandonisio Ilaria Marasco Claudia Pagano Cinzia Tonetti Vito Errico Giovanna Calò Sabina L. Campanelli Irene Fassi Investigating EMI shielding performance of recycled polypropylene (PP) composite foams with reused metal powders Materials & Design Recycled polymers Reused metal powders Foaming process EMI shielding |
| title | Investigating EMI shielding performance of recycled polypropylene (PP) composite foams with reused metal powders |
| title_full | Investigating EMI shielding performance of recycled polypropylene (PP) composite foams with reused metal powders |
| title_fullStr | Investigating EMI shielding performance of recycled polypropylene (PP) composite foams with reused metal powders |
| title_full_unstemmed | Investigating EMI shielding performance of recycled polypropylene (PP) composite foams with reused metal powders |
| title_short | Investigating EMI shielding performance of recycled polypropylene (PP) composite foams with reused metal powders |
| title_sort | investigating emi shielding performance of recycled polypropylene pp composite foams with reused metal powders |
| topic | Recycled polymers Reused metal powders Foaming process EMI shielding |
| url | http://www.sciencedirect.com/science/article/pii/S026412752500526X |
| work_keys_str_mv | AT valeriamarrocco investigatingemishieldingperformanceofrecycledpolypropyleneppcompositefoamswithreusedmetalpowders AT rossellasurace investigatingemishieldingperformanceofrecycledpolypropyleneppcompositefoamswithreusedmetalpowders AT elisabettabrandonisio investigatingemishieldingperformanceofrecycledpolypropyleneppcompositefoamswithreusedmetalpowders AT ilariamarasco investigatingemishieldingperformanceofrecycledpolypropyleneppcompositefoamswithreusedmetalpowders AT claudiapagano investigatingemishieldingperformanceofrecycledpolypropyleneppcompositefoamswithreusedmetalpowders AT cinziatonetti investigatingemishieldingperformanceofrecycledpolypropyleneppcompositefoamswithreusedmetalpowders AT vitoerrico investigatingemishieldingperformanceofrecycledpolypropyleneppcompositefoamswithreusedmetalpowders AT giovannacalo investigatingemishieldingperformanceofrecycledpolypropyleneppcompositefoamswithreusedmetalpowders AT sabinalcampanelli investigatingemishieldingperformanceofrecycledpolypropyleneppcompositefoamswithreusedmetalpowders AT irenefassi investigatingemishieldingperformanceofrecycledpolypropyleneppcompositefoamswithreusedmetalpowders |