On the preparation and physicochemical properties of pH-responsive hydrogel nanocomposite based on poly(acid methacrylic)/laponite RDS
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.mtcomm.2020.100936 http://hdl.handle.net/11449/198413 |
Resumo: | In this paper, a series of novel poly(methacrylic acid)/laponite RDS (PMAA/Lap RDS) nanocomposite hydrogels crosslinked by N,N’-methylene bisacrylamide were synthesized via free radical polymerization by using potassium persulfate as initiator. The main novelty of this paper refers to the detail investigation of how the laponite RDS influenced of the pKa, and consequently, the water-uptake of these nanocomposites. In parallel, the evidence of incorporation and interactions of the materials was confirmed by scanning electron microscopy and Fourier transform infrared spectra techniques. By the X-ray diffraction technique (XRD), it was possible to confirm the exfoliation/intercalation configuration of the nanoclay laponite RDS (Lap RDS) into the PMAA matrix. Hydrophilic properties, measured by swelling degree (SD), indicated that the presence of Lap RDS influenced the water uptake capability of the nanocomposite, reaching a maximum of 91 ± 2 g/g for nanocomposites constituted by 5 % of nanoclay. Besides, the pKa of the nanocomposite can be adjusted by nanoclay content. In this way, the ability of these hydrogels to respond to pH values can be useful to act as trigger in controlled release systems. |
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Repositório Institucional da UNESP |
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On the preparation and physicochemical properties of pH-responsive hydrogel nanocomposite based on poly(acid methacrylic)/laponite RDSHydrogelNanoclayNanocompositepH-responsiveSwelling degreeIn this paper, a series of novel poly(methacrylic acid)/laponite RDS (PMAA/Lap RDS) nanocomposite hydrogels crosslinked by N,N’-methylene bisacrylamide were synthesized via free radical polymerization by using potassium persulfate as initiator. The main novelty of this paper refers to the detail investigation of how the laponite RDS influenced of the pKa, and consequently, the water-uptake of these nanocomposites. In parallel, the evidence of incorporation and interactions of the materials was confirmed by scanning electron microscopy and Fourier transform infrared spectra techniques. By the X-ray diffraction technique (XRD), it was possible to confirm the exfoliation/intercalation configuration of the nanoclay laponite RDS (Lap RDS) into the PMAA matrix. Hydrophilic properties, measured by swelling degree (SD), indicated that the presence of Lap RDS influenced the water uptake capability of the nanocomposite, reaching a maximum of 91 ± 2 g/g for nanocomposites constituted by 5 % of nanoclay. Besides, the pKa of the nanocomposite can be adjusted by nanoclay content. In this way, the ability of these hydrogels to respond to pH values can be useful to act as trigger in controlled release systems.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Universidade Estadual PaulistaGrupo de Compósitos e Nanocompósitos Híbridos (GCNH) São Paulo State University (Unesp) School of EngineeringGrupo de Compósitos e Nanocompósitos Híbridos (GCNH) São Paulo State University (Unesp) School of EngineeringUniversidade Estadual Paulista (Unesp)Junior, Carlos R.F. [UNESP]Fernandes, Renan da S. [UNESP]de Moura, Marcia R. [UNESP]Aouada, Fauze A. [UNESP]2020-12-12T01:12:10Z2020-12-12T01:12:10Z2020-06-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1016/j.mtcomm.2020.100936Materials Today Communications, v. 23.2352-4928http://hdl.handle.net/11449/19841310.1016/j.mtcomm.2020.1009362-s2.0-85077945836Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengMaterials Today Communicationsinfo:eu-repo/semantics/openAccess2021-10-23T11:16:26Zoai:repositorio.unesp.br:11449/198413Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T18:26:43.054364Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
On the preparation and physicochemical properties of pH-responsive hydrogel nanocomposite based on poly(acid methacrylic)/laponite RDS |
title |
On the preparation and physicochemical properties of pH-responsive hydrogel nanocomposite based on poly(acid methacrylic)/laponite RDS |
spellingShingle |
On the preparation and physicochemical properties of pH-responsive hydrogel nanocomposite based on poly(acid methacrylic)/laponite RDS Junior, Carlos R.F. [UNESP] Hydrogel Nanoclay Nanocomposite pH-responsive Swelling degree |
title_short |
On the preparation and physicochemical properties of pH-responsive hydrogel nanocomposite based on poly(acid methacrylic)/laponite RDS |
title_full |
On the preparation and physicochemical properties of pH-responsive hydrogel nanocomposite based on poly(acid methacrylic)/laponite RDS |
title_fullStr |
On the preparation and physicochemical properties of pH-responsive hydrogel nanocomposite based on poly(acid methacrylic)/laponite RDS |
title_full_unstemmed |
On the preparation and physicochemical properties of pH-responsive hydrogel nanocomposite based on poly(acid methacrylic)/laponite RDS |
title_sort |
On the preparation and physicochemical properties of pH-responsive hydrogel nanocomposite based on poly(acid methacrylic)/laponite RDS |
author |
Junior, Carlos R.F. [UNESP] |
author_facet |
Junior, Carlos R.F. [UNESP] Fernandes, Renan da S. [UNESP] de Moura, Marcia R. [UNESP] Aouada, Fauze A. [UNESP] |
author_role |
author |
author2 |
Fernandes, Renan da S. [UNESP] de Moura, Marcia R. [UNESP] Aouada, Fauze A. [UNESP] |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Junior, Carlos R.F. [UNESP] Fernandes, Renan da S. [UNESP] de Moura, Marcia R. [UNESP] Aouada, Fauze A. [UNESP] |
dc.subject.por.fl_str_mv |
Hydrogel Nanoclay Nanocomposite pH-responsive Swelling degree |
topic |
Hydrogel Nanoclay Nanocomposite pH-responsive Swelling degree |
description |
In this paper, a series of novel poly(methacrylic acid)/laponite RDS (PMAA/Lap RDS) nanocomposite hydrogels crosslinked by N,N’-methylene bisacrylamide were synthesized via free radical polymerization by using potassium persulfate as initiator. The main novelty of this paper refers to the detail investigation of how the laponite RDS influenced of the pKa, and consequently, the water-uptake of these nanocomposites. In parallel, the evidence of incorporation and interactions of the materials was confirmed by scanning electron microscopy and Fourier transform infrared spectra techniques. By the X-ray diffraction technique (XRD), it was possible to confirm the exfoliation/intercalation configuration of the nanoclay laponite RDS (Lap RDS) into the PMAA matrix. Hydrophilic properties, measured by swelling degree (SD), indicated that the presence of Lap RDS influenced the water uptake capability of the nanocomposite, reaching a maximum of 91 ± 2 g/g for nanocomposites constituted by 5 % of nanoclay. Besides, the pKa of the nanocomposite can be adjusted by nanoclay content. In this way, the ability of these hydrogels to respond to pH values can be useful to act as trigger in controlled release systems. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-12-12T01:12:10Z 2020-12-12T01:12:10Z 2020-06-01 |
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://dx.doi.org/10.1016/j.mtcomm.2020.100936 Materials Today Communications, v. 23. 2352-4928 http://hdl.handle.net/11449/198413 10.1016/j.mtcomm.2020.100936 2-s2.0-85077945836 |
url |
http://dx.doi.org/10.1016/j.mtcomm.2020.100936 http://hdl.handle.net/11449/198413 |
identifier_str_mv |
Materials Today Communications, v. 23. 2352-4928 10.1016/j.mtcomm.2020.100936 2-s2.0-85077945836 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Materials Today Communications |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808128932964204544 |