Improving the processability and performance of micronized fiber-reinforced green composites through the use of biobased additives
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10773/35960 |
Resumo: | Green composites made of bioplastics reinforced with natural fibers have gained considerable attention over recent years. However, the use of natural fibers in composites usually compromise some key properties, such as the impact strength and the processability of the final materials. In the present study, two distinct additives, namely an epoxidized linseed oil (ELO) and a sugar-based surfactant, viz. GlucoPure® Sense (GPS), were tested in composite formulations of poly(lactic acid) (PLA) or poly(hydroxybutyrate) (PHB) reinforced with micronized pulp fibers. Both additives showed a plasticizing effect, which led to a decrease in the Young’s and flexural moduli and strengths. At the same time, the elongation and flexural strain at break were considerably improved on some formulations. The melt flow rate was also remarkably improved with the incorporation of the additives. In the PHB-based composites, an increment of 230% was observed upon incorporation of 7.5 wt.% ELO and, in composites based on PLA, an increase of around 155% was achieved with the introduction of 2.5 wt.% GPS. ELO also increased the impact strength to a maximum of 29 kJ m−2 , in formulations with PLA. For most composites, a faster degradation rate was observed on the formulations with the additives, reaching, in the case of PHB composites with GPS, a noteworthy weight loss over 75% under burial testing in compost medium at room temperature. |
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Improving the processability and performance of micronized fiber-reinforced green composites through the use of biobased additivesGreen compositesPoly(lactic acid)Poly(hydroxybutyrate)CelluloseMicronized fibersEpoxidized linseed oilSugar-based surfactantMechanical propertiesThermal propertiesBiodegradabilityGreen composites made of bioplastics reinforced with natural fibers have gained considerable attention over recent years. However, the use of natural fibers in composites usually compromise some key properties, such as the impact strength and the processability of the final materials. In the present study, two distinct additives, namely an epoxidized linseed oil (ELO) and a sugar-based surfactant, viz. GlucoPure® Sense (GPS), were tested in composite formulations of poly(lactic acid) (PLA) or poly(hydroxybutyrate) (PHB) reinforced with micronized pulp fibers. Both additives showed a plasticizing effect, which led to a decrease in the Young’s and flexural moduli and strengths. At the same time, the elongation and flexural strain at break were considerably improved on some formulations. The melt flow rate was also remarkably improved with the incorporation of the additives. In the PHB-based composites, an increment of 230% was observed upon incorporation of 7.5 wt.% ELO and, in composites based on PLA, an increase of around 155% was achieved with the introduction of 2.5 wt.% GPS. ELO also increased the impact strength to a maximum of 29 kJ m−2 , in formulations with PLA. For most composites, a faster degradation rate was observed on the formulations with the additives, reaching, in the case of PHB composites with GPS, a noteworthy weight loss over 75% under burial testing in compost medium at room temperature.MDPI2023-01-23T18:00:50Z2022-09-01T00:00:00Z2022-09info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10773/35960eng2073-436010.3390/polym14173451Valente, Bruno F. A.Silvestre, Armando J. D.Neto, Carlos PascoalVilela, CarlaFreire, Carmen S. R.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-02-22T12:08:55Zoai:ria.ua.pt:10773/35960Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:06:43.625133Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Improving the processability and performance of micronized fiber-reinforced green composites through the use of biobased additives |
title |
Improving the processability and performance of micronized fiber-reinforced green composites through the use of biobased additives |
spellingShingle |
Improving the processability and performance of micronized fiber-reinforced green composites through the use of biobased additives Valente, Bruno F. A. Green composites Poly(lactic acid) Poly(hydroxybutyrate) Cellulose Micronized fibers Epoxidized linseed oil Sugar-based surfactant Mechanical properties Thermal properties Biodegradability |
title_short |
Improving the processability and performance of micronized fiber-reinforced green composites through the use of biobased additives |
title_full |
Improving the processability and performance of micronized fiber-reinforced green composites through the use of biobased additives |
title_fullStr |
Improving the processability and performance of micronized fiber-reinforced green composites through the use of biobased additives |
title_full_unstemmed |
Improving the processability and performance of micronized fiber-reinforced green composites through the use of biobased additives |
title_sort |
Improving the processability and performance of micronized fiber-reinforced green composites through the use of biobased additives |
author |
Valente, Bruno F. A. |
author_facet |
Valente, Bruno F. A. Silvestre, Armando J. D. Neto, Carlos Pascoal Vilela, Carla Freire, Carmen S. R. |
author_role |
author |
author2 |
Silvestre, Armando J. D. Neto, Carlos Pascoal Vilela, Carla Freire, Carmen S. R. |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Valente, Bruno F. A. Silvestre, Armando J. D. Neto, Carlos Pascoal Vilela, Carla Freire, Carmen S. R. |
dc.subject.por.fl_str_mv |
Green composites Poly(lactic acid) Poly(hydroxybutyrate) Cellulose Micronized fibers Epoxidized linseed oil Sugar-based surfactant Mechanical properties Thermal properties Biodegradability |
topic |
Green composites Poly(lactic acid) Poly(hydroxybutyrate) Cellulose Micronized fibers Epoxidized linseed oil Sugar-based surfactant Mechanical properties Thermal properties Biodegradability |
description |
Green composites made of bioplastics reinforced with natural fibers have gained considerable attention over recent years. However, the use of natural fibers in composites usually compromise some key properties, such as the impact strength and the processability of the final materials. In the present study, two distinct additives, namely an epoxidized linseed oil (ELO) and a sugar-based surfactant, viz. GlucoPure® Sense (GPS), were tested in composite formulations of poly(lactic acid) (PLA) or poly(hydroxybutyrate) (PHB) reinforced with micronized pulp fibers. Both additives showed a plasticizing effect, which led to a decrease in the Young’s and flexural moduli and strengths. At the same time, the elongation and flexural strain at break were considerably improved on some formulations. The melt flow rate was also remarkably improved with the incorporation of the additives. In the PHB-based composites, an increment of 230% was observed upon incorporation of 7.5 wt.% ELO and, in composites based on PLA, an increase of around 155% was achieved with the introduction of 2.5 wt.% GPS. ELO also increased the impact strength to a maximum of 29 kJ m−2 , in formulations with PLA. For most composites, a faster degradation rate was observed on the formulations with the additives, reaching, in the case of PHB composites with GPS, a noteworthy weight loss over 75% under burial testing in compost medium at room temperature. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-09-01T00:00:00Z 2022-09 2023-01-23T18:00:50Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10773/35960 |
url |
http://hdl.handle.net/10773/35960 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
2073-4360 10.3390/polym14173451 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
MDPI |
publisher.none.fl_str_mv |
MDPI |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799137722534723584 |