On the preparation and physicochemical properties of pH-responsive hydrogel nanocomposite based on poly(acid methacrylic)/laponite RDS

Detalhes bibliográficos
Autor(a) principal: Junior, Carlos R.F. [UNESP]
Data de Publicação: 2020
Outros Autores: Fernandes, Renan da S. [UNESP], de Moura, Marcia R. [UNESP], Aouada, Fauze A. [UNESP]
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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spelling 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
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