Bioinspired fracture toughness enhancement of a fully bio-based epoxy resin
In this work, the concept of fracture toughness improvement via spatial variation of mechanical properties is applied to a composite with 100% bio-based carbon content based on epoxidized linseed oil. By proper selection of the hardener, either citric acid or sebacic acid, the mechanical properties...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-07-01
|
| Series: | Polymer Testing |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0142941823001782 |
| _version_ | 1797802231213326336 |
|---|---|
| author | Markus Schwaiger Christoph Waly Michael Huszar Gernot Oreski Michael Feuchter Florian Arbeiter Katharina Resch-Fauster |
| author_facet | Markus Schwaiger Christoph Waly Michael Huszar Gernot Oreski Michael Feuchter Florian Arbeiter Katharina Resch-Fauster |
| author_sort | Markus Schwaiger |
| collection | DOAJ |
| description | In this work, the concept of fracture toughness improvement via spatial variation of mechanical properties is applied to a composite with 100% bio-based carbon content based on epoxidized linseed oil. By proper selection of the hardener, either citric acid or sebacic acid, the mechanical properties were adjusted in a way that a bio-composite exhibits a stiff-soft-stiff layer architecture. Samples with two different thicknesses of soft interlayer (approx. 0.1 mm and 1.3 mm) were subsequently analyzed regarding their final performance. Specimen characteristics, owing to the curing and manufacturing process, were analyzed by means of local Fourier-transform infrared spectroscopy and differential scanning calorimetry. Fracture mechanics tests were performed to verify if the soft interlayer acts as a crack arrester. The results propose a high chemical compatibility between the used epoxy resins. Embedding a soft thin interlayer into a stiff resin matrix led to an increase in fracture toughness of 13 times, compared to the pure stiff resin. An increase in interlayer thickness led to a further increase in fracture toughness of 24 times. However, the stiffness decreased by 44% and 67%, respectively. |
| first_indexed | 2024-03-13T05:02:55Z |
| format | Article |
| id | doaj.art-3b4725ebea084c85a07b2dbc4fbd89b9 |
| institution | Directory Open Access Journal |
| issn | 0142-9418 |
| language | English |
| last_indexed | 2024-03-13T05:02:55Z |
| publishDate | 2023-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Polymer Testing |
| spelling | doaj.art-3b4725ebea084c85a07b2dbc4fbd89b92023-06-17T05:17:37ZengElsevierPolymer Testing0142-94182023-07-01124108098Bioinspired fracture toughness enhancement of a fully bio-based epoxy resinMarkus Schwaiger0Christoph Waly1Michael Huszar2Gernot Oreski3Michael Feuchter4Florian Arbeiter5Katharina Resch-Fauster6Materials Science and Testing of Polymers, Montanuniversitaet Leoben, Otto Gloeckel-Strasse 2, 8700, Leoben, AustriaMaterials Science and Testing of Polymers, Montanuniversitaet Leoben, Otto Gloeckel-Strasse 2, 8700, Leoben, AustriaMaterials Science and Testing of Polymers, Montanuniversitaet Leoben, Otto Gloeckel-Strasse 2, 8700, Leoben, AustriaPolymer Competence Center Leoben GmbH, Roseggerstrasse 12, 8700, Leoben, AustriaMaterials Science and Testing of Polymers, Montanuniversitaet Leoben, Otto Gloeckel-Strasse 2, 8700, Leoben, AustriaMaterials Science and Testing of Polymers, Montanuniversitaet Leoben, Otto Gloeckel-Strasse 2, 8700, Leoben, Austria; Corresponding authors.Materials Science and Testing of Polymers, Montanuniversitaet Leoben, Otto Gloeckel-Strasse 2, 8700, Leoben, Austria; Corresponding authors.In this work, the concept of fracture toughness improvement via spatial variation of mechanical properties is applied to a composite with 100% bio-based carbon content based on epoxidized linseed oil. By proper selection of the hardener, either citric acid or sebacic acid, the mechanical properties were adjusted in a way that a bio-composite exhibits a stiff-soft-stiff layer architecture. Samples with two different thicknesses of soft interlayer (approx. 0.1 mm and 1.3 mm) were subsequently analyzed regarding their final performance. Specimen characteristics, owing to the curing and manufacturing process, were analyzed by means of local Fourier-transform infrared spectroscopy and differential scanning calorimetry. Fracture mechanics tests were performed to verify if the soft interlayer acts as a crack arrester. The results propose a high chemical compatibility between the used epoxy resins. Embedding a soft thin interlayer into a stiff resin matrix led to an increase in fracture toughness of 13 times, compared to the pure stiff resin. An increase in interlayer thickness led to a further increase in fracture toughness of 24 times. However, the stiffness decreased by 44% and 67%, respectively.http://www.sciencedirect.com/science/article/pii/S0142941823001782Bio-based epoxy resinBio-compositeEpoxidized linseed oilFracture toughnessMaterial inhomogeneityLayered structures |
| spellingShingle | Markus Schwaiger Christoph Waly Michael Huszar Gernot Oreski Michael Feuchter Florian Arbeiter Katharina Resch-Fauster Bioinspired fracture toughness enhancement of a fully bio-based epoxy resin Polymer Testing Bio-based epoxy resin Bio-composite Epoxidized linseed oil Fracture toughness Material inhomogeneity Layered structures |
| title | Bioinspired fracture toughness enhancement of a fully bio-based epoxy resin |
| title_full | Bioinspired fracture toughness enhancement of a fully bio-based epoxy resin |
| title_fullStr | Bioinspired fracture toughness enhancement of a fully bio-based epoxy resin |
| title_full_unstemmed | Bioinspired fracture toughness enhancement of a fully bio-based epoxy resin |
| title_short | Bioinspired fracture toughness enhancement of a fully bio-based epoxy resin |
| title_sort | bioinspired fracture toughness enhancement of a fully bio based epoxy resin |
| topic | Bio-based epoxy resin Bio-composite Epoxidized linseed oil Fracture toughness Material inhomogeneity Layered structures |
| url | http://www.sciencedirect.com/science/article/pii/S0142941823001782 |
| work_keys_str_mv | AT markusschwaiger bioinspiredfracturetoughnessenhancementofafullybiobasedepoxyresin AT christophwaly bioinspiredfracturetoughnessenhancementofafullybiobasedepoxyresin AT michaelhuszar bioinspiredfracturetoughnessenhancementofafullybiobasedepoxyresin AT gernotoreski bioinspiredfracturetoughnessenhancementofafullybiobasedepoxyresin AT michaelfeuchter bioinspiredfracturetoughnessenhancementofafullybiobasedepoxyresin AT florianarbeiter bioinspiredfracturetoughnessenhancementofafullybiobasedepoxyresin AT katharinareschfauster bioinspiredfracturetoughnessenhancementofafullybiobasedepoxyresin |