Strength improvement of hydroxypropyl methylcellulose/ starch films using cellulose nanocrystals
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , , , , , , |
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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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_ |
1807835152095641600 |