Nanofibrils vs nanocrystals bio-nanocomposites based on sodium alginate matrix: an improved-performance study
Autor(a) principal: | |
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Data de Publicação: | 2020 |
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/10400.13/3300 |
Resumo: | To develop bio-nanocomposites using natural biopolymers, nanocomposite films were prepared based on sodium alginate and kapok nanofibrils (CNFs). CNFs when subjected to TEMPO-mediated oxidation gave rise to cellulose nanocrystals (TOCNCs), with carboxyl groups at the surface ( Ka/Kb = 3.64). The differences between the two types of nanocelluloses (nanofibrils and nanocrystals) and their impact in the preparation of bio-nanocomposites, were studied. When incorporated in the matrix, the CNFs particles have the tendency to form surface aggregation ( Ka/Kb = 2.37), distorting the alginate network, creating heterogeneous films, with high surface roughness (S a = 29.37 nm), porosity (D p = 0.087 cm2/min) and vulnerability to heat. The TOCNCs present good dispersion creating a 3D network, which forms uniform (D p = 0.122 cm2/min) and homogeneous films, with smooth surface (S a = 16.83 nm). The ultrasonication treatment facilitated the dispersion improving the interfacial interaction between the reinforcing phase and the matrix. The results show the reinforcement potential of kapok nanocellulose in an industrially and medically important biopolymer, sodium alginate, especially when TOCNCs and ultrasonication were used. |
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Nanofibrils vs nanocrystals bio-nanocomposites based on sodium alginate matrix: an improved-performance studyMaterials scienceNanotechnologyNanomaterialsMaterials characterizationMaterials propertyAgricultural technologyNanofibrilsNanocrystalsTEMPO-Mediated oxidationSodium alginateKapok fiberNanocomposite.Faculdade de Ciências Exatas e da EngenhariaTo develop bio-nanocomposites using natural biopolymers, nanocomposite films were prepared based on sodium alginate and kapok nanofibrils (CNFs). CNFs when subjected to TEMPO-mediated oxidation gave rise to cellulose nanocrystals (TOCNCs), with carboxyl groups at the surface ( Ka/Kb = 3.64). The differences between the two types of nanocelluloses (nanofibrils and nanocrystals) and their impact in the preparation of bio-nanocomposites, were studied. When incorporated in the matrix, the CNFs particles have the tendency to form surface aggregation ( Ka/Kb = 2.37), distorting the alginate network, creating heterogeneous films, with high surface roughness (S a = 29.37 nm), porosity (D p = 0.087 cm2/min) and vulnerability to heat. The TOCNCs present good dispersion creating a 3D network, which forms uniform (D p = 0.122 cm2/min) and homogeneous films, with smooth surface (S a = 16.83 nm). The ultrasonication treatment facilitated the dispersion improving the interfacial interaction between the reinforcing phase and the matrix. The results show the reinforcement potential of kapok nanocellulose in an industrially and medically important biopolymer, sodium alginate, especially when TOCNCs and ultrasonication were used.ElsevierDigitUMaDeepa, B.Abraham, E.Cordeiro, NereidaFaria, M.Primc, G.Pottathara, Y.Leskovšek, M.Gorjanc, M.Mozetič, M.Thomas, S.Pothan, L.A.2021-04-16T14:38:15Z2020-01-01T00:00:00Z2020-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.13/3300engDeepa, B., Abraham, E., Cordeiro, N., Faria, M., Primc, G., Pottathara, Y., ... & Pothan, L. A. (2020). Nanofibrils vs nanocrystals bio-nanocomposites based on sodium alginate matrix: an improved-performance study. Heliyon, 6(2), e03266.10.1016/j.heliyon.2020.e03266info: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:RCAAP2022-09-05T12:56:14Zoai:digituma.uma.pt:10400.13/3300Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T15:06:19.876645Repositório 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 |
Nanofibrils vs nanocrystals bio-nanocomposites based on sodium alginate matrix: an improved-performance study |
title |
Nanofibrils vs nanocrystals bio-nanocomposites based on sodium alginate matrix: an improved-performance study |
spellingShingle |
Nanofibrils vs nanocrystals bio-nanocomposites based on sodium alginate matrix: an improved-performance study Deepa, B. Materials science Nanotechnology Nanomaterials Materials characterization Materials property Agricultural technology Nanofibrils Nanocrystals TEMPO-Mediated oxidation Sodium alginate Kapok fiber Nanocomposite . Faculdade de Ciências Exatas e da Engenharia |
title_short |
Nanofibrils vs nanocrystals bio-nanocomposites based on sodium alginate matrix: an improved-performance study |
title_full |
Nanofibrils vs nanocrystals bio-nanocomposites based on sodium alginate matrix: an improved-performance study |
title_fullStr |
Nanofibrils vs nanocrystals bio-nanocomposites based on sodium alginate matrix: an improved-performance study |
title_full_unstemmed |
Nanofibrils vs nanocrystals bio-nanocomposites based on sodium alginate matrix: an improved-performance study |
title_sort |
Nanofibrils vs nanocrystals bio-nanocomposites based on sodium alginate matrix: an improved-performance study |
author |
Deepa, B. |
author_facet |
Deepa, B. Abraham, E. Cordeiro, Nereida Faria, M. Primc, G. Pottathara, Y. Leskovšek, M. Gorjanc, M. Mozetič, M. Thomas, S. Pothan, L.A. |
author_role |
author |
author2 |
Abraham, E. Cordeiro, Nereida Faria, M. Primc, G. Pottathara, Y. Leskovšek, M. Gorjanc, M. Mozetič, M. Thomas, S. Pothan, L.A. |
author2_role |
author author author author author author author author author author |
dc.contributor.none.fl_str_mv |
DigitUMa |
dc.contributor.author.fl_str_mv |
Deepa, B. Abraham, E. Cordeiro, Nereida Faria, M. Primc, G. Pottathara, Y. Leskovšek, M. Gorjanc, M. Mozetič, M. Thomas, S. Pothan, L.A. |
dc.subject.por.fl_str_mv |
Materials science Nanotechnology Nanomaterials Materials characterization Materials property Agricultural technology Nanofibrils Nanocrystals TEMPO-Mediated oxidation Sodium alginate Kapok fiber Nanocomposite . Faculdade de Ciências Exatas e da Engenharia |
topic |
Materials science Nanotechnology Nanomaterials Materials characterization Materials property Agricultural technology Nanofibrils Nanocrystals TEMPO-Mediated oxidation Sodium alginate Kapok fiber Nanocomposite . Faculdade de Ciências Exatas e da Engenharia |
description |
To develop bio-nanocomposites using natural biopolymers, nanocomposite films were prepared based on sodium alginate and kapok nanofibrils (CNFs). CNFs when subjected to TEMPO-mediated oxidation gave rise to cellulose nanocrystals (TOCNCs), with carboxyl groups at the surface ( Ka/Kb = 3.64). The differences between the two types of nanocelluloses (nanofibrils and nanocrystals) and their impact in the preparation of bio-nanocomposites, were studied. When incorporated in the matrix, the CNFs particles have the tendency to form surface aggregation ( Ka/Kb = 2.37), distorting the alginate network, creating heterogeneous films, with high surface roughness (S a = 29.37 nm), porosity (D p = 0.087 cm2/min) and vulnerability to heat. The TOCNCs present good dispersion creating a 3D network, which forms uniform (D p = 0.122 cm2/min) and homogeneous films, with smooth surface (S a = 16.83 nm). The ultrasonication treatment facilitated the dispersion improving the interfacial interaction between the reinforcing phase and the matrix. The results show the reinforcement potential of kapok nanocellulose in an industrially and medically important biopolymer, sodium alginate, especially when TOCNCs and ultrasonication were used. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-01-01T00:00:00Z 2020-01-01T00:00:00Z 2021-04-16T14:38:15Z |
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/10400.13/3300 |
url |
http://hdl.handle.net/10400.13/3300 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Deepa, B., Abraham, E., Cordeiro, N., Faria, M., Primc, G., Pottathara, Y., ... & Pothan, L. A. (2020). Nanofibrils vs nanocrystals bio-nanocomposites based on sodium alginate matrix: an improved-performance study. Heliyon, 6(2), e03266. 10.1016/j.heliyon.2020.e03266 |
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 |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
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 |
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RCAAP |
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RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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