Unique Combination of Surface Energy and Lewis Acid–Base Characteristics of Superhydrophobic Cellulose Fibers
Autor(a) principal: | |
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Data de Publicação: | 2016 |
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/10316/36735 https://doi.org/10.1021/acs.langmuir.6b03970 |
Resumo: | Cellulose fibers were first functionalized on their surface by silanization with trichloromethylsilane in an optimized gas-solid reaction, and the occurrence of the reaction was assessed using attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy. Then, the changes in the physicochemical surface properties of the material were thoroughly assessed using inverse gas chromatography (IGC) and X-ray photoelectron spectroscopy as surface specific tools. A very surprising combination of results was obtained: (i) the dispersive component of the surface energy was found to decrease from 42 to 14 mJ m(-2) (at 40 °C), the latter figure representing one of the lowest values ever reported (by IGC) for cellulose-based materials, and (ii) both Lewis acidic and Lewis basic characters of the fiber surface, as measured by the injection into the IGC columns of 15 different vapor probes, significantly increased with silanization. Moreover, those remarkable changes in the surface properties of the material were obtained at a low degree of silanization (as shown by ATR-FTIR). The present results may have a great impact in what concerns the application of the described type of superhydrophobic cellulose fibers for the production of new biocomposites: an unusual enhanced compatibility both with low-surface energy polymeric matrices, such as polyolefins, as well as with other types of matrices through Lewis acid-base interactions, can be predicted. |
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Unique Combination of Surface Energy and Lewis Acid–Base Characteristics of Superhydrophobic Cellulose FibersCellulose fibers were first functionalized on their surface by silanization with trichloromethylsilane in an optimized gas-solid reaction, and the occurrence of the reaction was assessed using attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy. Then, the changes in the physicochemical surface properties of the material were thoroughly assessed using inverse gas chromatography (IGC) and X-ray photoelectron spectroscopy as surface specific tools. A very surprising combination of results was obtained: (i) the dispersive component of the surface energy was found to decrease from 42 to 14 mJ m(-2) (at 40 °C), the latter figure representing one of the lowest values ever reported (by IGC) for cellulose-based materials, and (ii) both Lewis acidic and Lewis basic characters of the fiber surface, as measured by the injection into the IGC columns of 15 different vapor probes, significantly increased with silanization. Moreover, those remarkable changes in the surface properties of the material were obtained at a low degree of silanization (as shown by ATR-FTIR). The present results may have a great impact in what concerns the application of the described type of superhydrophobic cellulose fibers for the production of new biocomposites: an unusual enhanced compatibility both with low-surface energy polymeric matrices, such as polyolefins, as well as with other types of matrices through Lewis acid-base interactions, can be predicted.American Chemical Society2016-12-29info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10316/36735http://hdl.handle.net/10316/36735https://doi.org/10.1021/acs.langmuir.6b03970https://doi.org/10.1021/acs.langmuir.6b03970enghttp://pubs.acs.org/doi/abs/10.1021/acs.langmuir.6b03970Gamelas, J. A. F.Salvador, A.Hidalgo, J.Ferreira, P. J.Tejado, A.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:RCAAP2021-06-29T10:03:07Zoai:estudogeral.uc.pt:10316/36735Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:59:13.964552Repositório 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 |
Unique Combination of Surface Energy and Lewis Acid–Base Characteristics of Superhydrophobic Cellulose Fibers |
title |
Unique Combination of Surface Energy and Lewis Acid–Base Characteristics of Superhydrophobic Cellulose Fibers |
spellingShingle |
Unique Combination of Surface Energy and Lewis Acid–Base Characteristics of Superhydrophobic Cellulose Fibers Gamelas, J. A. F. |
title_short |
Unique Combination of Surface Energy and Lewis Acid–Base Characteristics of Superhydrophobic Cellulose Fibers |
title_full |
Unique Combination of Surface Energy and Lewis Acid–Base Characteristics of Superhydrophobic Cellulose Fibers |
title_fullStr |
Unique Combination of Surface Energy and Lewis Acid–Base Characteristics of Superhydrophobic Cellulose Fibers |
title_full_unstemmed |
Unique Combination of Surface Energy and Lewis Acid–Base Characteristics of Superhydrophobic Cellulose Fibers |
title_sort |
Unique Combination of Surface Energy and Lewis Acid–Base Characteristics of Superhydrophobic Cellulose Fibers |
author |
Gamelas, J. A. F. |
author_facet |
Gamelas, J. A. F. Salvador, A. Hidalgo, J. Ferreira, P. J. Tejado, A. |
author_role |
author |
author2 |
Salvador, A. Hidalgo, J. Ferreira, P. J. Tejado, A. |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Gamelas, J. A. F. Salvador, A. Hidalgo, J. Ferreira, P. J. Tejado, A. |
description |
Cellulose fibers were first functionalized on their surface by silanization with trichloromethylsilane in an optimized gas-solid reaction, and the occurrence of the reaction was assessed using attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy. Then, the changes in the physicochemical surface properties of the material were thoroughly assessed using inverse gas chromatography (IGC) and X-ray photoelectron spectroscopy as surface specific tools. A very surprising combination of results was obtained: (i) the dispersive component of the surface energy was found to decrease from 42 to 14 mJ m(-2) (at 40 °C), the latter figure representing one of the lowest values ever reported (by IGC) for cellulose-based materials, and (ii) both Lewis acidic and Lewis basic characters of the fiber surface, as measured by the injection into the IGC columns of 15 different vapor probes, significantly increased with silanization. Moreover, those remarkable changes in the surface properties of the material were obtained at a low degree of silanization (as shown by ATR-FTIR). The present results may have a great impact in what concerns the application of the described type of superhydrophobic cellulose fibers for the production of new biocomposites: an unusual enhanced compatibility both with low-surface energy polymeric matrices, such as polyolefins, as well as with other types of matrices through Lewis acid-base interactions, can be predicted. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-12-29 |
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/10316/36735 http://hdl.handle.net/10316/36735 https://doi.org/10.1021/acs.langmuir.6b03970 https://doi.org/10.1021/acs.langmuir.6b03970 |
url |
http://hdl.handle.net/10316/36735 https://doi.org/10.1021/acs.langmuir.6b03970 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
http://pubs.acs.org/doi/abs/10.1021/acs.langmuir.6b03970 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
American Chemical Society |
publisher.none.fl_str_mv |
American Chemical Society |
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) |
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 |
repository.mail.fl_str_mv |
|
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1799133883591032832 |