Novel manufacturing method for highly flexible poly(lactic acid) foams and ferroelectrets
Poly (lactic acid) (PLA) foams have demonstrated a high variety of functional characteristics, still, the rigidity of this cellular material remains a major limiting factor when it comes to implementation options. In this contribution, PLA foams with outstanding flexibility were created for the firs...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2024-04-01
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| Series: | Advanced Industrial and Engineering Polymer Research |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2542504823000210 |
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| author | Dániel Vadas Katalin Bocz Tamás Igricz János Volk Sándor Bordács Lajos Madarász György Marosi |
| author_facet | Dániel Vadas Katalin Bocz Tamás Igricz János Volk Sándor Bordács Lajos Madarász György Marosi |
| author_sort | Dániel Vadas |
| collection | DOAJ |
| description | Poly (lactic acid) (PLA) foams have demonstrated a high variety of functional characteristics, still, the rigidity of this cellular material remains a major limiting factor when it comes to implementation options. In this contribution, PLA foams with outstanding flexibility were created for the first time by a new approach of uniaxial stretching and immediate relaxation following supercritical CO2-assisted extrusion foaming. Instead of improving the resilience of the PLA raw material, structural elasticity of the foam was achieved via altering the deformation mechanism from cell wall collapse or rupture towards reversible and extensive flexural strain. In addition, PLA foams with excellent piezoelectric properties were also achieved via high-voltage corona poling, giving additional function to the lens-like anisotropic foam cells. This foaming technology creates the opportunity to produce PLA piezoelectrets in a way entirely different from the state-of-the-art methods. Correlation between the tensile as well as compression elongations and moduli, cell morphology and longitudinal piezoelectric coefficients (d33) of electretized foam samples were studied. Unprecedented reversible tensile elongations of up to 16% and total elongations of up to 35% were reached, as well as considerable d33 values in the range of 50–320 pC/N were obtained for PLA ferroelectrets. |
| first_indexed | 2024-04-24T07:37:45Z |
| format | Article |
| id | doaj.art-c8cef33c1a2c4cecac8ff6a20e2dca9c |
| institution | Directory Open Access Journal |
| issn | 2542-5048 |
| language | English |
| last_indexed | 2024-04-24T07:37:45Z |
| publishDate | 2024-04-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Advanced Industrial and Engineering Polymer Research |
| spelling | doaj.art-c8cef33c1a2c4cecac8ff6a20e2dca9c2024-04-20T04:17:43ZengKeAi Communications Co., Ltd.Advanced Industrial and Engineering Polymer Research2542-50482024-04-0172215225Novel manufacturing method for highly flexible poly(lactic acid) foams and ferroelectretsDániel Vadas0Katalin Bocz1Tamás Igricz2János Volk3Sándor Bordács4Lajos Madarász5György Marosi6Department of Organic Chemistry and Technology, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, Műegyetem rkp. 3, H-1111, Budapest, HungaryDepartment of Organic Chemistry and Technology, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, Műegyetem rkp. 3, H-1111, Budapest, Hungary; Corresponding author.Department of Organic Chemistry and Technology, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, Műegyetem rkp. 3, H-1111, Budapest, HungaryCentre for Energy Research, Institute of Technical Physics and Materials Science, Konkoly-Thege M. u. 29-33, H-1121, Budapest, HungaryDepartment of Physics, Institute of Physics, Budapest University of Technology and Economics, Műegyetem rkp. 3, H-1111, Budapest, HungaryDepartment of Organic Chemistry and Technology, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, Műegyetem rkp. 3, H-1111, Budapest, HungaryDepartment of Organic Chemistry and Technology, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, Műegyetem rkp. 3, H-1111, Budapest, HungaryPoly (lactic acid) (PLA) foams have demonstrated a high variety of functional characteristics, still, the rigidity of this cellular material remains a major limiting factor when it comes to implementation options. In this contribution, PLA foams with outstanding flexibility were created for the first time by a new approach of uniaxial stretching and immediate relaxation following supercritical CO2-assisted extrusion foaming. Instead of improving the resilience of the PLA raw material, structural elasticity of the foam was achieved via altering the deformation mechanism from cell wall collapse or rupture towards reversible and extensive flexural strain. In addition, PLA foams with excellent piezoelectric properties were also achieved via high-voltage corona poling, giving additional function to the lens-like anisotropic foam cells. This foaming technology creates the opportunity to produce PLA piezoelectrets in a way entirely different from the state-of-the-art methods. Correlation between the tensile as well as compression elongations and moduli, cell morphology and longitudinal piezoelectric coefficients (d33) of electretized foam samples were studied. Unprecedented reversible tensile elongations of up to 16% and total elongations of up to 35% were reached, as well as considerable d33 values in the range of 50–320 pC/N were obtained for PLA ferroelectrets.http://www.sciencedirect.com/science/article/pii/S2542504823000210Flexible PLA foamAnisotropyStructural elasticityFerroelectret |
| spellingShingle | Dániel Vadas Katalin Bocz Tamás Igricz János Volk Sándor Bordács Lajos Madarász György Marosi Novel manufacturing method for highly flexible poly(lactic acid) foams and ferroelectrets Advanced Industrial and Engineering Polymer Research Flexible PLA foam Anisotropy Structural elasticity Ferroelectret |
| title | Novel manufacturing method for highly flexible poly(lactic acid) foams and ferroelectrets |
| title_full | Novel manufacturing method for highly flexible poly(lactic acid) foams and ferroelectrets |
| title_fullStr | Novel manufacturing method for highly flexible poly(lactic acid) foams and ferroelectrets |
| title_full_unstemmed | Novel manufacturing method for highly flexible poly(lactic acid) foams and ferroelectrets |
| title_short | Novel manufacturing method for highly flexible poly(lactic acid) foams and ferroelectrets |
| title_sort | novel manufacturing method for highly flexible poly lactic acid foams and ferroelectrets |
| topic | Flexible PLA foam Anisotropy Structural elasticity Ferroelectret |
| url | http://www.sciencedirect.com/science/article/pii/S2542504823000210 |
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