Influence of Diatomaceous Earth Particle Size on Mechanical Properties of PLA/Diatomaceous Earth Composites
The fractionation of diatomaceous earth (DE) using sedimentation made it possible to obtain separate unbroken diatom fractions from broken or agglomerated bodies with a range of particle sizes. The produced filler was used to prepare polylactide (PLA)/diatomaceous earth biocomposite samples containi...
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MDPI AG
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| Online Access: | https://www.mdpi.com/1996-1944/15/10/3607 |
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| author | Marta Dobrosielska Renata Dobrucka Dariusz Brząkalski Miłosz Frydrych Paulina Kozera Monika Wieczorek Marek Jałbrzykowski Krzysztof J. Kurzydłowski Robert E. Przekop |
| author_facet | Marta Dobrosielska Renata Dobrucka Dariusz Brząkalski Miłosz Frydrych Paulina Kozera Monika Wieczorek Marek Jałbrzykowski Krzysztof J. Kurzydłowski Robert E. Przekop |
| author_sort | Marta Dobrosielska |
| collection | DOAJ |
| description | The fractionation of diatomaceous earth (DE) using sedimentation made it possible to obtain separate unbroken diatom fractions from broken or agglomerated bodies with a range of particle sizes. The produced filler was used to prepare polylactide (PLA)/diatomaceous earth biocomposite samples containing different particle sizes, which were subjected to mechanical testing (tensile strength, flexural strength, impact strength), colloidal testing (contact angle, color change test, SEM/EDS), and thermal testing (TGA, DSC, DMA). Modification of the PLA containing the smallest particle size with diatomaceous earth (Fraction 5) resulted in a higher impact strength compared to both the pure PLA and the PLA/DE composite that contained base diatomaceous earth. Furthermore, the melt flow rate was improved by more than 80 and 60% for the composite modified with fractionated diatomaceous earth (Fraction 4) compared to pure PLA and base diatomaceous earth, respectively. The elasticity of the composite was also improved from 3.3 GPa for pure polylactide to 4.4 GPa for the system containing the smallest diatomaceous earth particles (Fraction 5). |
| first_indexed | 2024-03-10T03:30:55Z |
| format | Article |
| id | doaj.art-75edb1cb7c74452fa04d448dd7adf13c |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T03:30:55Z |
| publishDate | 2022-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-75edb1cb7c74452fa04d448dd7adf13c2023-11-23T11:57:54ZengMDPI AGMaterials1996-19442022-05-011510360710.3390/ma15103607Influence of Diatomaceous Earth Particle Size on Mechanical Properties of PLA/Diatomaceous Earth CompositesMarta Dobrosielska0Renata Dobrucka1Dariusz Brząkalski2Miłosz Frydrych3Paulina Kozera4Monika Wieczorek5Marek Jałbrzykowski6Krzysztof J. Kurzydłowski7Robert E. Przekop8Faculty of Materials Science and Engineering, Warsaw University of Technology, ul. Wołoska 141, 02-507 Warsaw, PolandFaculty of Materials Science and Engineering, Warsaw University of Technology, ul. Wołoska 141, 02-507 Warsaw, PolandFaculty of Chemistry, Adam Mickiewicz University in Poznań, ul. Uniwersytetu Poznańskiego 8, 61-614 Poznań, PolandFaculty of Chemistry, Adam Mickiewicz University in Poznań, ul. Uniwersytetu Poznańskiego 8, 61-614 Poznań, PolandFaculty of Materials Science and Engineering, Warsaw University of Technology, ul. Wołoska 141, 02-507 Warsaw, PolandFaculty of Materials Science and Engineering, Warsaw University of Technology, ul. Wołoska 141, 02-507 Warsaw, PolandFaculty of Mechanical Engineering, Bialystok University of Technology, ul. Wiejska 45 c, 15-351 Bialystok, PolandFaculty of Mechanical Engineering, Bialystok University of Technology, ul. Wiejska 45 c, 15-351 Bialystok, PolandCentre for Advanced Technologies, Adam Mickiewicz University in Poznań, ul. Uniwersytetu Poznańskiego 10, 61-614 Poznan, PolandThe fractionation of diatomaceous earth (DE) using sedimentation made it possible to obtain separate unbroken diatom fractions from broken or agglomerated bodies with a range of particle sizes. The produced filler was used to prepare polylactide (PLA)/diatomaceous earth biocomposite samples containing different particle sizes, which were subjected to mechanical testing (tensile strength, flexural strength, impact strength), colloidal testing (contact angle, color change test, SEM/EDS), and thermal testing (TGA, DSC, DMA). Modification of the PLA containing the smallest particle size with diatomaceous earth (Fraction 5) resulted in a higher impact strength compared to both the pure PLA and the PLA/DE composite that contained base diatomaceous earth. Furthermore, the melt flow rate was improved by more than 80 and 60% for the composite modified with fractionated diatomaceous earth (Fraction 4) compared to pure PLA and base diatomaceous earth, respectively. The elasticity of the composite was also improved from 3.3 GPa for pure polylactide to 4.4 GPa for the system containing the smallest diatomaceous earth particles (Fraction 5).https://www.mdpi.com/1996-1944/15/10/3607diatomaceous earthpolylactideparticle sizemechanical propertiesbiocomposite |
| spellingShingle | Marta Dobrosielska Renata Dobrucka Dariusz Brząkalski Miłosz Frydrych Paulina Kozera Monika Wieczorek Marek Jałbrzykowski Krzysztof J. Kurzydłowski Robert E. Przekop Influence of Diatomaceous Earth Particle Size on Mechanical Properties of PLA/Diatomaceous Earth Composites Materials diatomaceous earth polylactide particle size mechanical properties biocomposite |
| title | Influence of Diatomaceous Earth Particle Size on Mechanical Properties of PLA/Diatomaceous Earth Composites |
| title_full | Influence of Diatomaceous Earth Particle Size on Mechanical Properties of PLA/Diatomaceous Earth Composites |
| title_fullStr | Influence of Diatomaceous Earth Particle Size on Mechanical Properties of PLA/Diatomaceous Earth Composites |
| title_full_unstemmed | Influence of Diatomaceous Earth Particle Size on Mechanical Properties of PLA/Diatomaceous Earth Composites |
| title_short | Influence of Diatomaceous Earth Particle Size on Mechanical Properties of PLA/Diatomaceous Earth Composites |
| title_sort | influence of diatomaceous earth particle size on mechanical properties of pla diatomaceous earth composites |
| topic | diatomaceous earth polylactide particle size mechanical properties biocomposite |
| url | https://www.mdpi.com/1996-1944/15/10/3607 |
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