EFFECT OF PH, IONIC CONCENTRATION AND SPECIES ON THE ABSORPTION OF WATER BY HYDROGEL BIONANOCOMPOSITS CONSTITUTED FROM CMC/PAAm/ LAPONITE RDS
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.21577/0100-4042.20170396 http://hdl.handle.net/11449/196263 |
Resumo: | The objective of this paper was to study the effect of pH. concentration and ionic species on the water absorption of the bionanocomposite hydrogels based on carboxymethylcellulose polysaccharide and laponite nanoclay. Bionanocomposite hydrogels were obtained via free radical polymerization. It was possible to observe that the swelling degree (Q) and kinetic properties were strongly influenced, and controlled, by the presence and quantity of ionic species, decreasing their water uptake when compared to the same values obtained in distilled water. Furthermore. the addition of nanoclay decreased the water uptake sensibility of the hydrogel in ionic media. It was also observed that the presence of the nanoclay decreased the Q(eq) distilled water values from 32.5 g to 22.5 g g(-1). The pKa variation of the bionanocomposites was a good indication of the possible interaction of the nanoclay-polymeric chains. The possibility of the control of water absorption (velocity and quantity) whereas these nanocomposites are pH- and salt-responsive may potentiate their application in agriculture. Agronomical studies are in progress. which can confirm its applicability in this area. |
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EFFECT OF PH, IONIC CONCENTRATION AND SPECIES ON THE ABSORPTION OF WATER BY HYDROGEL BIONANOCOMPOSITS CONSTITUTED FROM CMC/PAAm/ LAPONITE RDSnanoclayswelling degreekinetic propertiescarboxymethylcellulosepKaThe objective of this paper was to study the effect of pH. concentration and ionic species on the water absorption of the bionanocomposite hydrogels based on carboxymethylcellulose polysaccharide and laponite nanoclay. Bionanocomposite hydrogels were obtained via free radical polymerization. It was possible to observe that the swelling degree (Q) and kinetic properties were strongly influenced, and controlled, by the presence and quantity of ionic species, decreasing their water uptake when compared to the same values obtained in distilled water. Furthermore. the addition of nanoclay decreased the water uptake sensibility of the hydrogel in ionic media. It was also observed that the presence of the nanoclay decreased the Q(eq) distilled water values from 32.5 g to 22.5 g g(-1). The pKa variation of the bionanocomposites was a good indication of the possible interaction of the nanoclay-polymeric chains. The possibility of the control of water absorption (velocity and quantity) whereas these nanocomposites are pH- and salt-responsive may potentiate their application in agriculture. Agronomical studies are in progress. which can confirm its applicability in this area.Univ Estadual Paulista, Fac Engn Ilha Solteira, Dept Fis & Quim, BR-15385000 Ilha Solteira, SP, BrazilFEIS, Programa Posgrad Ciencia Mat PPGCEM, Grp Compositos & Nanocompositos Hibridos, Ilha Solteira, SP, BrazilUniv Estadual Paulista, Fac Engn Ilha Solteira, Dept Fis & Quim, BR-15385000 Ilha Solteira, SP, BrazilSoc Brasileira QuimicaUniversidade Estadual Paulista (Unesp)FEISGarcia, Joao A. F. [UNESP]Moura, Marcia R. de [UNESP]Aouada, Fauze A. [UNESP]2020-12-10T19:38:59Z2020-12-10T19:38:59Z2019-08-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article831-837application/pdfhttp://dx.doi.org/10.21577/0100-4042.20170396Quimica Nova. Sao Paulo: Soc Brasileira Quimica, v. 42, n. 8, p. 831-837, 2019.0100-4042http://hdl.handle.net/11449/19626310.21577/0100-4042.20170396S0100-40422019004800831WOS:000491934800002S0100-40422019004800831.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPporQuimica Novainfo:eu-repo/semantics/openAccess2024-07-10T14:08:09Zoai:repositorio.unesp.br:11449/196263Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T22:48:28.059148Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
EFFECT OF PH, IONIC CONCENTRATION AND SPECIES ON THE ABSORPTION OF WATER BY HYDROGEL BIONANOCOMPOSITS CONSTITUTED FROM CMC/PAAm/ LAPONITE RDS |
title |
EFFECT OF PH, IONIC CONCENTRATION AND SPECIES ON THE ABSORPTION OF WATER BY HYDROGEL BIONANOCOMPOSITS CONSTITUTED FROM CMC/PAAm/ LAPONITE RDS |
spellingShingle |
EFFECT OF PH, IONIC CONCENTRATION AND SPECIES ON THE ABSORPTION OF WATER BY HYDROGEL BIONANOCOMPOSITS CONSTITUTED FROM CMC/PAAm/ LAPONITE RDS Garcia, Joao A. F. [UNESP] nanoclay swelling degree kinetic properties carboxymethylcellulose pKa |
title_short |
EFFECT OF PH, IONIC CONCENTRATION AND SPECIES ON THE ABSORPTION OF WATER BY HYDROGEL BIONANOCOMPOSITS CONSTITUTED FROM CMC/PAAm/ LAPONITE RDS |
title_full |
EFFECT OF PH, IONIC CONCENTRATION AND SPECIES ON THE ABSORPTION OF WATER BY HYDROGEL BIONANOCOMPOSITS CONSTITUTED FROM CMC/PAAm/ LAPONITE RDS |
title_fullStr |
EFFECT OF PH, IONIC CONCENTRATION AND SPECIES ON THE ABSORPTION OF WATER BY HYDROGEL BIONANOCOMPOSITS CONSTITUTED FROM CMC/PAAm/ LAPONITE RDS |
title_full_unstemmed |
EFFECT OF PH, IONIC CONCENTRATION AND SPECIES ON THE ABSORPTION OF WATER BY HYDROGEL BIONANOCOMPOSITS CONSTITUTED FROM CMC/PAAm/ LAPONITE RDS |
title_sort |
EFFECT OF PH, IONIC CONCENTRATION AND SPECIES ON THE ABSORPTION OF WATER BY HYDROGEL BIONANOCOMPOSITS CONSTITUTED FROM CMC/PAAm/ LAPONITE RDS |
author |
Garcia, Joao A. F. [UNESP] |
author_facet |
Garcia, Joao A. F. [UNESP] Moura, Marcia R. de [UNESP] Aouada, Fauze A. [UNESP] |
author_role |
author |
author2 |
Moura, Marcia R. de [UNESP] Aouada, Fauze A. [UNESP] |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) FEIS |
dc.contributor.author.fl_str_mv |
Garcia, Joao A. F. [UNESP] Moura, Marcia R. de [UNESP] Aouada, Fauze A. [UNESP] |
dc.subject.por.fl_str_mv |
nanoclay swelling degree kinetic properties carboxymethylcellulose pKa |
topic |
nanoclay swelling degree kinetic properties carboxymethylcellulose pKa |
description |
The objective of this paper was to study the effect of pH. concentration and ionic species on the water absorption of the bionanocomposite hydrogels based on carboxymethylcellulose polysaccharide and laponite nanoclay. Bionanocomposite hydrogels were obtained via free radical polymerization. It was possible to observe that the swelling degree (Q) and kinetic properties were strongly influenced, and controlled, by the presence and quantity of ionic species, decreasing their water uptake when compared to the same values obtained in distilled water. Furthermore. the addition of nanoclay decreased the water uptake sensibility of the hydrogel in ionic media. It was also observed that the presence of the nanoclay decreased the Q(eq) distilled water values from 32.5 g to 22.5 g g(-1). The pKa variation of the bionanocomposites was a good indication of the possible interaction of the nanoclay-polymeric chains. The possibility of the control of water absorption (velocity and quantity) whereas these nanocomposites are pH- and salt-responsive may potentiate their application in agriculture. Agronomical studies are in progress. which can confirm its applicability in this area. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-08-01 2020-12-10T19:38:59Z 2020-12-10T19:38:59Z |
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/10.21577/0100-4042.20170396 Quimica Nova. Sao Paulo: Soc Brasileira Quimica, v. 42, n. 8, p. 831-837, 2019. 0100-4042 http://hdl.handle.net/11449/196263 10.21577/0100-4042.20170396 S0100-40422019004800831 WOS:000491934800002 S0100-40422019004800831.pdf |
url |
http://dx.doi.org/10.21577/0100-4042.20170396 http://hdl.handle.net/11449/196263 |
identifier_str_mv |
Quimica Nova. Sao Paulo: Soc Brasileira Quimica, v. 42, n. 8, p. 831-837, 2019. 0100-4042 10.21577/0100-4042.20170396 S0100-40422019004800831 WOS:000491934800002 S0100-40422019004800831.pdf |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
Quimica Nova |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
831-837 application/pdf |
dc.publisher.none.fl_str_mv |
Soc Brasileira Quimica |
publisher.none.fl_str_mv |
Soc Brasileira Quimica |
dc.source.none.fl_str_mv |
Web of Science 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_ |
1808129463829921792 |