Strength improvement of hydroxypropyl methylcellulose/ starch films using cellulose nanocrystals

Detalhes bibliográficos
Autor(a) principal: Prado, Ney Robson Taironi do
Data de Publicação: 2017
Outros Autores: Raabe, Joabel, Mirmehdi, Seyedmohammad, Hugen, Lisiane Nunes, Lima, Lidiane Costa, Ramos, Alcinéia de Lemos Souza, Guimarães Junior, Mário, Tonoli, Gustavo Henrique Denzin
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFLA
Texto Completo: http://repositorio.ufla.br/jspui/handle/1/31510
Resumo: Interest in cellulose nanocrystals obtained from natural resources has grown mainly because of features that such materials provide when inserted into polymeric matrices. The present study aimed to evaluate the effect of cellulose nanocrystals addition on mechanical properties of biofilms made from hypromellose (or hydroxypropyl methylcellulose - HPMC) and cassava starch blends (CS). The cellulose nanocrystals were produced by acid hydrolysis and characterized by optical microscopy (OM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and thermogravimetry (TG). Films were made with pure CS, pure hypromellose and also with blends of CS and hypromellose by casting. Then cellulose nanocrystals were added to the blends in the concentrations of 1, 3 and 10% (m/m). Evaluations of the films included tensile performance and fracture surface by scanning electron microscopy (SEM). It was observed that the reinforcement with nanocrystals improved the mechanical properties of the films, and their fracture surface showed that cellulose nanocrystals promoted an improvement in the cohesion of the hypromellose and starch molecules in the blend, and created a more homogeneous surface.
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spelling Strength improvement of hydroxypropyl methylcellulose/ starch films using cellulose nanocrystalsMelhorando a resistência de filmes de hidroxipropil metilcelulose/ amido com nanocristais de celuloseBiofilmHypromelloseCastingCassava starchBiofilmeHipromeloseNanofibrasAmido de mandiocaInterest in cellulose nanocrystals obtained from natural resources has grown mainly because of features that such materials provide when inserted into polymeric matrices. The present study aimed to evaluate the effect of cellulose nanocrystals addition on mechanical properties of biofilms made from hypromellose (or hydroxypropyl methylcellulose - HPMC) and cassava starch blends (CS). The cellulose nanocrystals were produced by acid hydrolysis and characterized by optical microscopy (OM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and thermogravimetry (TG). Films were made with pure CS, pure hypromellose and also with blends of CS and hypromellose by casting. Then cellulose nanocrystals were added to the blends in the concentrations of 1, 3 and 10% (m/m). Evaluations of the films included tensile performance and fracture surface by scanning electron microscopy (SEM). It was observed that the reinforcement with nanocrystals improved the mechanical properties of the films, and their fracture surface showed that cellulose nanocrystals promoted an improvement in the cohesion of the hypromellose and starch molecules in the blend, and created a more homogeneous surface.O interesse em nanocristais de celulose obtidos a partir de recursos naturais tem crescido principalmente devido a características que esses materiais fornecem quando inseridos em matrizes poliméricas. O presente estudo teve como objetivo avaliar o efeito da adição de nanocristais de celulose nas propriedades mecânicas dos biofilmes feitos a partir de hipromelose (ou hidroxipropil metilcelulose - HPMC) e misturas com amido de mandioca (CS). Os nanocristais de celulose foram produzidos por hidrólise ácida e caracterizados por microscopia óptica (OM), microscopia eletrônica de transmissão (TEM), difração de raios X (XRD) e termogravimetria (TG). Os filmes foram feitos por fundição (ou “casting”) com CS puro, hipromelose pura e também com misturas de CS e hipromelose. Em seguida, os nanocristais de celulose foram adicionados às misturas nas concentrações de 1, 3 e 10% (m/m). As avaliações dos filmes incluíram a resistência a tração e a superfície da fratura por microscopia eletrônica de varredura (SEM). Observou-se que o reforço com nanocristais de celulose melhorou as propriedades mecânicas, e as observações da superfície de fratura dos filmes testados mostraram que os nanocristais promoveram uma melhora na coesão da hipromelose e do amido na mistura e promoveram uma superfície mais homogênea.Universidade Federal de Lavras2018-10-30T19:50:17Z2018-10-30T19:50:17Z2017info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfPRADO, N. R. T. do et al. Strength improvement of hydroxypropyl methylcellulose/ starch films using cellulose nanocrystals. Cerne, Lavras, v. 23, n. 4, p. 423-434, 2017.http://repositorio.ufla.br/jspui/handle/1/31510Cernereponame:Repositório Institucional da UFLAinstname:Universidade Federal de Lavras (UFLA)instacron:UFLAAttribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessPrado, Ney Robson Taironi doRaabe, JoabelMirmehdi, SeyedmohammadHugen, Lisiane NunesLima, Lidiane CostaRamos, Alcinéia de Lemos SouzaGuimarães Junior, MárioTonoli, Gustavo Henrique Denzineng2018-10-30T19:51:16Zoai:localhost:1/31510Repositório InstitucionalPUBhttp://repositorio.ufla.br/oai/requestnivaldo@ufla.br || repositorio.biblioteca@ufla.bropendoar:2018-10-30T19:51:16Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)false
dc.title.none.fl_str_mv Strength improvement of hydroxypropyl methylcellulose/ starch films using cellulose nanocrystals
Melhorando a resistência de filmes de hidroxipropil metilcelulose/ amido com nanocristais de celulose
title Strength improvement of hydroxypropyl methylcellulose/ starch films using cellulose nanocrystals
spellingShingle Strength improvement of hydroxypropyl methylcellulose/ starch films using cellulose nanocrystals
Prado, Ney Robson Taironi do
Biofilm
Hypromellose
Casting
Cassava starch
Biofilme
Hipromelose
Nanofibras
Amido de mandioca
title_short Strength improvement of hydroxypropyl methylcellulose/ starch films using cellulose nanocrystals
title_full Strength improvement of hydroxypropyl methylcellulose/ starch films using cellulose nanocrystals
title_fullStr Strength improvement of hydroxypropyl methylcellulose/ starch films using cellulose nanocrystals
title_full_unstemmed Strength improvement of hydroxypropyl methylcellulose/ starch films using cellulose nanocrystals
title_sort Strength improvement of hydroxypropyl methylcellulose/ starch films using cellulose nanocrystals
author Prado, Ney Robson Taironi do
author_facet Prado, Ney Robson Taironi do
Raabe, Joabel
Mirmehdi, Seyedmohammad
Hugen, Lisiane Nunes
Lima, Lidiane Costa
Ramos, Alcinéia de Lemos Souza
Guimarães Junior, Mário
Tonoli, Gustavo Henrique Denzin
author_role author
author2 Raabe, Joabel
Mirmehdi, Seyedmohammad
Hugen, Lisiane Nunes
Lima, Lidiane Costa
Ramos, Alcinéia de Lemos Souza
Guimarães Junior, Mário
Tonoli, Gustavo Henrique Denzin
author2_role author
author
author
author
author
author
author
dc.contributor.author.fl_str_mv Prado, Ney Robson Taironi do
Raabe, Joabel
Mirmehdi, Seyedmohammad
Hugen, Lisiane Nunes
Lima, Lidiane Costa
Ramos, Alcinéia de Lemos Souza
Guimarães Junior, Mário
Tonoli, Gustavo Henrique Denzin
dc.subject.por.fl_str_mv Biofilm
Hypromellose
Casting
Cassava starch
Biofilme
Hipromelose
Nanofibras
Amido de mandioca
topic Biofilm
Hypromellose
Casting
Cassava starch
Biofilme
Hipromelose
Nanofibras
Amido de mandioca
description Interest in cellulose nanocrystals obtained from natural resources has grown mainly because of features that such materials provide when inserted into polymeric matrices. The present study aimed to evaluate the effect of cellulose nanocrystals addition on mechanical properties of biofilms made from hypromellose (or hydroxypropyl methylcellulose - HPMC) and cassava starch blends (CS). The cellulose nanocrystals were produced by acid hydrolysis and characterized by optical microscopy (OM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and thermogravimetry (TG). Films were made with pure CS, pure hypromellose and also with blends of CS and hypromellose by casting. Then cellulose nanocrystals were added to the blends in the concentrations of 1, 3 and 10% (m/m). Evaluations of the films included tensile performance and fracture surface by scanning electron microscopy (SEM). It was observed that the reinforcement with nanocrystals improved the mechanical properties of the films, and their fracture surface showed that cellulose nanocrystals promoted an improvement in the cohesion of the hypromellose and starch molecules in the blend, and created a more homogeneous surface.
publishDate 2017
dc.date.none.fl_str_mv 2017
2018-10-30T19:50:17Z
2018-10-30T19:50:17Z
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 PRADO, N. R. T. do et al. Strength improvement of hydroxypropyl methylcellulose/ starch films using cellulose nanocrystals. Cerne, Lavras, v. 23, n. 4, p. 423-434, 2017.
http://repositorio.ufla.br/jspui/handle/1/31510
identifier_str_mv PRADO, N. R. T. do et al. Strength improvement of hydroxypropyl methylcellulose/ starch films using cellulose nanocrystals. Cerne, Lavras, v. 23, n. 4, p. 423-434, 2017.
url http://repositorio.ufla.br/jspui/handle/1/31510
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidade Federal de Lavras
publisher.none.fl_str_mv Universidade Federal de Lavras
dc.source.none.fl_str_mv Cerne
reponame:Repositório Institucional da UFLA
instname:Universidade Federal de Lavras (UFLA)
instacron:UFLA
instname_str Universidade Federal de Lavras (UFLA)
instacron_str UFLA
institution UFLA
reponame_str Repositório Institucional da UFLA
collection Repositório Institucional da UFLA
repository.name.fl_str_mv Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)
repository.mail.fl_str_mv nivaldo@ufla.br || repositorio.biblioteca@ufla.br
_version_ 1784550154162929664

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