Preparação e estudo de filmes automontados de quitosana e carboximetilcelulose sobre substrato de poli(ácido lático)
Autor(a) principal: | |
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Data de Publicação: | 2013 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFSCAR |
Texto Completo: | https://repositorio.ufscar.br/handle/ufscar/1183 |
Resumo: | Poly(lactic acid) (PLA) films has been used in several different areas such as packaging and for innumerous medical uses. The modification of these films with the goal of providing new features, such as resistance to growth of fungi and bacteria, presents great potential of application. In this work was studied the formation of thin films produced by the self-assembly process known as layer-by-layer (LbL) of two polysaccharides, one cationic and one anionic, respectively, chitosan and carboxymethylcellulose (CMC) on PLA substrates. The films were firstly assembled on glass substrate and silicon in order to determine the optimal conditions of deposition. PLA films substrates were used without and with surface modification from ultraviolet light exposure. The purpose of the surface modification was to produce ionizable groups, such as carboxylates, on the film surface of the PLA film to improve the anchoring of the LbL film. It were produced films with 5, 10, 15 and 20 bilayers. The films were characterized by scanning electron microscopy, profilometry, infrared spectroscopy (FTIR), quartz microbalance and optical microscopy. The modification of PLA films was monitored by FTIR measurements and contact angle measurements. The uniformity of the LbL films was satisfactory, with increasing roughness of the order of 20 nm at each bilayer. It was observed a linear growth with bilayers increasing at a rate of approximately 80 nm of thickness per bilayer. The process of surface modification of films with UV light was effective, however it was found difficulty in controlling the process, which also causes the degradation of the film. The proposed process for the production of hybrid films PLA/LbL-chitosan/CMC proved to be very effective and promising for PLA functionalization. |
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Santos, Franciele Nicole dosCarvalho, Antonio José Felix dehttp://lattes.cnpq.br/5050955206618507Waldman, Walter Ruggerihttp://lattes.cnpq.br/0616238673458322Ferreira, Marystelahttp://lattes.cnpq.br/4714185516263478Campana Filho, Sergio Paulohttp://lattes.cnpq.br/4709958581193166http://lattes.cnpq.br/0735926429956867950cb06c-0667-42c2-bdba-7ecd76be601f2016-06-02T19:19:57Z2015-06-242016-06-02T19:19:57Z2013-05-20SANTOS, Franciele Nicole dos. Preparation and study of LBL chitosan/carboxymethylcellulose films supported on poly(lactic acid) substrate. 2013. 76 f. Dissertação (Mestrado em Materiais Funcionais e Polímeros de Fontes Renováveis) - Universidade Federal de São Carlos, Sorocaba, 2013.https://repositorio.ufscar.br/handle/ufscar/1183Poly(lactic acid) (PLA) films has been used in several different areas such as packaging and for innumerous medical uses. The modification of these films with the goal of providing new features, such as resistance to growth of fungi and bacteria, presents great potential of application. In this work was studied the formation of thin films produced by the self-assembly process known as layer-by-layer (LbL) of two polysaccharides, one cationic and one anionic, respectively, chitosan and carboxymethylcellulose (CMC) on PLA substrates. The films were firstly assembled on glass substrate and silicon in order to determine the optimal conditions of deposition. PLA films substrates were used without and with surface modification from ultraviolet light exposure. The purpose of the surface modification was to produce ionizable groups, such as carboxylates, on the film surface of the PLA film to improve the anchoring of the LbL film. It were produced films with 5, 10, 15 and 20 bilayers. The films were characterized by scanning electron microscopy, profilometry, infrared spectroscopy (FTIR), quartz microbalance and optical microscopy. The modification of PLA films was monitored by FTIR measurements and contact angle measurements. The uniformity of the LbL films was satisfactory, with increasing roughness of the order of 20 nm at each bilayer. It was observed a linear growth with bilayers increasing at a rate of approximately 80 nm of thickness per bilayer. The process of surface modification of films with UV light was effective, however it was found difficulty in controlling the process, which also causes the degradation of the film. The proposed process for the production of hybrid films PLA/LbL-chitosan/CMC proved to be very effective and promising for PLA functionalization.Filmes de poli(ácido lático) (PLA) tem sido usado em diferentes áreas, como embalagens e inúmeras aplicações médicas. A modificação destes filmes, com o objetivo de agregar propriedades como resistência ao crescimento de fungos e bactérias, apresenta grande potencial de aplicação. Neste trabalho estudou-se a formação de filmes finos produzidos pelo processo de auto-organização conhecido como layer-by-layer (LbL), de dois polissacarídeos, um catiônico e um aniônico, respectivamente, quitosana e carboximetilcelulose (CMC) sobre substratos de PLA. Os filmes foram primeiramente montados em substrato de vidro e de silício, com o objetivo de determinar as condições ótimas de deposição. Filmes de PLA como substrato foram usados com e sem modificação de superfície pela exposição à luz ultravioleta. A proposta da modificação de superfície foi produzir grupos ionizáveis, tais como carboxilatos, na superfície do filme de PLA para melhorar a ancoragem do filme LbL. Foram produzidos filmes com 5, 10, 15 e 20 bicamadas de quitosana/CMC. Os filmes foram caracterizados por microscopia eletrônica de varredura (MEV), perfilometria, espectroscopia no infravermelho (FTIR), microbalança de quartzo e microscopia óptica. A modificação do PLA foi monitorada por medidas de FTIR e ângulo de contato. A uniformidade dos filmes LbL foi satisfatória, com aumento da rugosidade de aproximadamente 20 nm por bicamada. Foi observado um aumento linear de espessura com uma taxa de aproximadamente 80 nm de espessura por bicamada. O processo de modificação de superfície dos filmes com luz UV foi efetivo, entretanto foram encontradas dificuldades no controle do processo, que também causa degradação no filme. O processo proposto de produção de filmes híbridos PLA/LbL-quitosana/CMC mostrou-se muito efetivo e promissor para a funcionalização do PLA.Financiadora de Estudos e Projetosapplication/pdfporUniversidade Federal de São CarlosPrograma de Pós-Graduação em Ciência dos Materiais - PPGCM-SoUFSCarBRFilmes automontadosBiopolímerosENGENHARIAS::ENGENHARIA QUIMICA::TECNOLOGIA QUIMICA::POLIMEROSPreparação e estudo de filmes automontados de quitosana e carboximetilcelulose sobre substrato de poli(ácido lático)Preparation and study of LBL chitosan/carboxymethylcellulose films supported on poly(lactic acid) substrateinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesis-1-113a624ef-23a8-48cb-8cf5-1b81e8d1f422info:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFSCARinstname:Universidade Federal de São Carlos (UFSCAR)instacron:UFSCARORIGINALSANTOS_Franciele_2013.pdfapplication/pdf2522023https://repositorio.ufscar.br/bitstream/ufscar/1183/1/SANTOS_Franciele_2013.pdfdd97c9c84ab6cbab651409656654ae86MD51THUMBNAILSANTOS_Franciele_2013.pdf.jpgSANTOS_Franciele_2013.pdf.jpgIM Thumbnailimage/jpeg6012https://repositorio.ufscar.br/bitstream/ufscar/1183/2/SANTOS_Franciele_2013.pdf.jpgcbcd30c1e881a0c14e95d235c10e1debMD52ufscar/11832023-09-18 18:30:41.77oai:repositorio.ufscar.br:ufscar/1183Repositório InstitucionalPUBhttps://repositorio.ufscar.br/oai/requestopendoar:43222023-09-18T18:30:41Repositório Institucional da UFSCAR - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.por.fl_str_mv |
Preparação e estudo de filmes automontados de quitosana e carboximetilcelulose sobre substrato de poli(ácido lático) |
dc.title.alternative.eng.fl_str_mv |
Preparation and study of LBL chitosan/carboxymethylcellulose films supported on poly(lactic acid) substrate |
title |
Preparação e estudo de filmes automontados de quitosana e carboximetilcelulose sobre substrato de poli(ácido lático) |
spellingShingle |
Preparação e estudo de filmes automontados de quitosana e carboximetilcelulose sobre substrato de poli(ácido lático) Santos, Franciele Nicole dos Filmes automontados Biopolímeros ENGENHARIAS::ENGENHARIA QUIMICA::TECNOLOGIA QUIMICA::POLIMEROS |
title_short |
Preparação e estudo de filmes automontados de quitosana e carboximetilcelulose sobre substrato de poli(ácido lático) |
title_full |
Preparação e estudo de filmes automontados de quitosana e carboximetilcelulose sobre substrato de poli(ácido lático) |
title_fullStr |
Preparação e estudo de filmes automontados de quitosana e carboximetilcelulose sobre substrato de poli(ácido lático) |
title_full_unstemmed |
Preparação e estudo de filmes automontados de quitosana e carboximetilcelulose sobre substrato de poli(ácido lático) |
title_sort |
Preparação e estudo de filmes automontados de quitosana e carboximetilcelulose sobre substrato de poli(ácido lático) |
author |
Santos, Franciele Nicole dos |
author_facet |
Santos, Franciele Nicole dos |
author_role |
author |
dc.contributor.authorlattes.por.fl_str_mv |
http://lattes.cnpq.br/0735926429956867 |
dc.contributor.author.fl_str_mv |
Santos, Franciele Nicole dos |
dc.contributor.advisor1.fl_str_mv |
Carvalho, Antonio José Felix de |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/5050955206618507 |
dc.contributor.advisor-co1.fl_str_mv |
Waldman, Walter Ruggeri |
dc.contributor.advisor-co1Lattes.fl_str_mv |
http://lattes.cnpq.br/0616238673458322 |
dc.contributor.referee1.fl_str_mv |
Ferreira, Marystela |
dc.contributor.referee1Lattes.fl_str_mv |
http://lattes.cnpq.br/4714185516263478 |
dc.contributor.referee2.fl_str_mv |
Campana Filho, Sergio Paulo |
dc.contributor.referee2Lattes.fl_str_mv |
http://lattes.cnpq.br/4709958581193166 |
dc.contributor.authorID.fl_str_mv |
950cb06c-0667-42c2-bdba-7ecd76be601f |
contributor_str_mv |
Carvalho, Antonio José Felix de Waldman, Walter Ruggeri Ferreira, Marystela Campana Filho, Sergio Paulo |
dc.subject.por.fl_str_mv |
Filmes automontados Biopolímeros |
topic |
Filmes automontados Biopolímeros ENGENHARIAS::ENGENHARIA QUIMICA::TECNOLOGIA QUIMICA::POLIMEROS |
dc.subject.cnpq.fl_str_mv |
ENGENHARIAS::ENGENHARIA QUIMICA::TECNOLOGIA QUIMICA::POLIMEROS |
description |
Poly(lactic acid) (PLA) films has been used in several different areas such as packaging and for innumerous medical uses. The modification of these films with the goal of providing new features, such as resistance to growth of fungi and bacteria, presents great potential of application. In this work was studied the formation of thin films produced by the self-assembly process known as layer-by-layer (LbL) of two polysaccharides, one cationic and one anionic, respectively, chitosan and carboxymethylcellulose (CMC) on PLA substrates. The films were firstly assembled on glass substrate and silicon in order to determine the optimal conditions of deposition. PLA films substrates were used without and with surface modification from ultraviolet light exposure. The purpose of the surface modification was to produce ionizable groups, such as carboxylates, on the film surface of the PLA film to improve the anchoring of the LbL film. It were produced films with 5, 10, 15 and 20 bilayers. The films were characterized by scanning electron microscopy, profilometry, infrared spectroscopy (FTIR), quartz microbalance and optical microscopy. The modification of PLA films was monitored by FTIR measurements and contact angle measurements. The uniformity of the LbL films was satisfactory, with increasing roughness of the order of 20 nm at each bilayer. It was observed a linear growth with bilayers increasing at a rate of approximately 80 nm of thickness per bilayer. The process of surface modification of films with UV light was effective, however it was found difficulty in controlling the process, which also causes the degradation of the film. The proposed process for the production of hybrid films PLA/LbL-chitosan/CMC proved to be very effective and promising for PLA functionalization. |
publishDate |
2013 |
dc.date.issued.fl_str_mv |
2013-05-20 |
dc.date.available.fl_str_mv |
2015-06-24 2016-06-02T19:19:57Z |
dc.date.accessioned.fl_str_mv |
2016-06-02T19:19:57Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
SANTOS, Franciele Nicole dos. Preparation and study of LBL chitosan/carboxymethylcellulose films supported on poly(lactic acid) substrate. 2013. 76 f. Dissertação (Mestrado em Materiais Funcionais e Polímeros de Fontes Renováveis) - Universidade Federal de São Carlos, Sorocaba, 2013. |
dc.identifier.uri.fl_str_mv |
https://repositorio.ufscar.br/handle/ufscar/1183 |
identifier_str_mv |
SANTOS, Franciele Nicole dos. Preparation and study of LBL chitosan/carboxymethylcellulose films supported on poly(lactic acid) substrate. 2013. 76 f. Dissertação (Mestrado em Materiais Funcionais e Polímeros de Fontes Renováveis) - Universidade Federal de São Carlos, Sorocaba, 2013. |
url |
https://repositorio.ufscar.br/handle/ufscar/1183 |
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por |
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info:eu-repo/semantics/openAccess |
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openAccess |
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application/pdf |
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Universidade Federal de São Carlos |
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Programa de Pós-Graduação em Ciência dos Materiais - PPGCM-So |
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UFSCar |
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BR |
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Universidade Federal de São Carlos |
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