Properties and Degradation of Novel Fully Biodegradable PLA/PHB Blends Filled with Keratin
The utilization of keratin waste in new materials formulations can prevent its environmental disposal problem. Here, novel composites based on biodegradable blends consisting of poly(lactic acid) (PLA) and poly(3-hydroxybutyrate) (PHB), and filled with hydrolyzed keratin with loading from 1 to 20 wt...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2020-12-01
|
| Series: | International Journal of Molecular Sciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1422-0067/21/24/9678 |
| _version_ | 1797544163666821120 |
|---|---|
| author | Katarína Mosnáčková Alena Opálková Šišková Angela Kleinová Martin Danko Jaroslav Mosnáček |
| author_facet | Katarína Mosnáčková Alena Opálková Šišková Angela Kleinová Martin Danko Jaroslav Mosnáček |
| author_sort | Katarína Mosnáčková |
| collection | DOAJ |
| description | The utilization of keratin waste in new materials formulations can prevent its environmental disposal problem. Here, novel composites based on biodegradable blends consisting of poly(lactic acid) (PLA) and poly(3-hydroxybutyrate) (PHB), and filled with hydrolyzed keratin with loading from 1 to 20 wt % were prepared and their properties were investigated. Mechanical and viscoelastic properties were characterized by tensile test, dynamic mechanical thermal analysis (DMTA) and rheology measurements. The addition of acetyltributyl citrate (ATBC) significantly affected the mechanical properties of the materials. It was found that the filled PLA/PHB/ATBC composite at the highest keratin loading exhibited similar shear moduli compared to the un-plasticized blend as a result of the much stronger interactions between the keratin and polymer matrix compared to composites with lower keratin content. The differences in dynamic moduli for PLA/PHB/ATBC blend filled with keratin depended extensively on the keratin content while loss the factor values progressively decreased with keratin loading. Softening interactions between the keratin and polymer matrix resulted in lower glass transitions temperature and reduced polymer chain mobility. The addition of keratin did not affect the extent of degradation of the PLA/PHB blend during melt blending. Fast hydrolysis at 60 °C was observed for composites with all keratin loadings. The developed keratin-based composites possess properties comparable to commonly used thermoplastics applicable for example as packaging materials. |
| first_indexed | 2024-03-10T13:56:32Z |
| format | Article |
| id | doaj.art-c1fdd34a75bf4f5891c859ece7fc3180 |
| institution | Directory Open Access Journal |
| issn | 1661-6596 1422-0067 |
| language | English |
| last_indexed | 2024-03-10T13:56:32Z |
| publishDate | 2020-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | International Journal of Molecular Sciences |
| spelling | doaj.art-c1fdd34a75bf4f5891c859ece7fc31802023-11-21T01:35:55ZengMDPI AGInternational Journal of Molecular Sciences1661-65961422-00672020-12-012124967810.3390/ijms21249678Properties and Degradation of Novel Fully Biodegradable PLA/PHB Blends Filled with KeratinKatarína Mosnáčková0Alena Opálková Šišková1Angela Kleinová2Martin Danko3Jaroslav Mosnáček4Polymer Institute, Slovak Academy of Sciences, Dubravská Cesta 9, 845 41 Bratislava, SlovakiaPolymer Institute, Slovak Academy of Sciences, Dubravská Cesta 9, 845 41 Bratislava, SlovakiaPolymer Institute, Slovak Academy of Sciences, Dubravská Cesta 9, 845 41 Bratislava, SlovakiaPolymer Institute, Slovak Academy of Sciences, Dubravská Cesta 9, 845 41 Bratislava, SlovakiaPolymer Institute, Slovak Academy of Sciences, Dubravská Cesta 9, 845 41 Bratislava, SlovakiaThe utilization of keratin waste in new materials formulations can prevent its environmental disposal problem. Here, novel composites based on biodegradable blends consisting of poly(lactic acid) (PLA) and poly(3-hydroxybutyrate) (PHB), and filled with hydrolyzed keratin with loading from 1 to 20 wt % were prepared and their properties were investigated. Mechanical and viscoelastic properties were characterized by tensile test, dynamic mechanical thermal analysis (DMTA) and rheology measurements. The addition of acetyltributyl citrate (ATBC) significantly affected the mechanical properties of the materials. It was found that the filled PLA/PHB/ATBC composite at the highest keratin loading exhibited similar shear moduli compared to the un-plasticized blend as a result of the much stronger interactions between the keratin and polymer matrix compared to composites with lower keratin content. The differences in dynamic moduli for PLA/PHB/ATBC blend filled with keratin depended extensively on the keratin content while loss the factor values progressively decreased with keratin loading. Softening interactions between the keratin and polymer matrix resulted in lower glass transitions temperature and reduced polymer chain mobility. The addition of keratin did not affect the extent of degradation of the PLA/PHB blend during melt blending. Fast hydrolysis at 60 °C was observed for composites with all keratin loadings. The developed keratin-based composites possess properties comparable to commonly used thermoplastics applicable for example as packaging materials.https://www.mdpi.com/1422-0067/21/24/9678keratinnatural waste materialbiodegradable composites |
| spellingShingle | Katarína Mosnáčková Alena Opálková Šišková Angela Kleinová Martin Danko Jaroslav Mosnáček Properties and Degradation of Novel Fully Biodegradable PLA/PHB Blends Filled with Keratin International Journal of Molecular Sciences keratin natural waste material biodegradable composites |
| title | Properties and Degradation of Novel Fully Biodegradable PLA/PHB Blends Filled with Keratin |
| title_full | Properties and Degradation of Novel Fully Biodegradable PLA/PHB Blends Filled with Keratin |
| title_fullStr | Properties and Degradation of Novel Fully Biodegradable PLA/PHB Blends Filled with Keratin |
| title_full_unstemmed | Properties and Degradation of Novel Fully Biodegradable PLA/PHB Blends Filled with Keratin |
| title_short | Properties and Degradation of Novel Fully Biodegradable PLA/PHB Blends Filled with Keratin |
| title_sort | properties and degradation of novel fully biodegradable pla phb blends filled with keratin |
| topic | keratin natural waste material biodegradable composites |
| url | https://www.mdpi.com/1422-0067/21/24/9678 |
| work_keys_str_mv | AT katarinamosnackova propertiesanddegradationofnovelfullybiodegradableplaphbblendsfilledwithkeratin AT alenaopalkovasiskova propertiesanddegradationofnovelfullybiodegradableplaphbblendsfilledwithkeratin AT angelakleinova propertiesanddegradationofnovelfullybiodegradableplaphbblendsfilledwithkeratin AT martindanko propertiesanddegradationofnovelfullybiodegradableplaphbblendsfilledwithkeratin AT jaroslavmosnacek propertiesanddegradationofnovelfullybiodegradableplaphbblendsfilledwithkeratin |