Effect of Different Surface-Charged Lamellar Materials on Swelling Properties of Nanocomposite Hydrogels

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Federal de São Carlos (UFSCar)-
Autor(es): dc.contributorEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA)-
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.creatorPfeifer, Marcela-
Autor(es): dc.creatorAndrade, Flávio A. C.-
Autor(es): dc.creatorBortoletto-Santos, Ricardo [UNESP]-
Autor(es): dc.creatorAouada, Fauze A. [UNESP]-
Autor(es): dc.creatorRibeiro, Caue-
Data de aceite: dc.date.accessioned2022-02-22T00:46:05Z-
Data de disponibilização: dc.date.available2022-02-22T00:46:05Z-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2020-12-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1007/s10924-021-02120-7-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/206074-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/206074-
Descrição: dc.descriptionThis study investigated the effect of different surface-charged lamellar materials on the swelling and diffusion properties of synthesized polyacrylamide-methylcellulose hydrogels (HG). Montmorillonite and thermally activated hydrotalcite (300 °C and 550 °C) were incorporated during the preparation of nanocomposite (NC) hydrogels. A series of NC hydrogels were prepared by varying the lamellar material content (1:1, 2:1 and 4:1). The results showed that the HG with hydrotalcite (550 °C) was strongly dependent on the ionic intensity, and that the swelling degree increased by 50%, 65% and 78% with reducing the hydrotalcite content at (1:1), (2:1) and (4:1), respectively. The water absorption capacity of HG containing montmorillonite or hydrotalcite (300 ºC) was slightly affected when the pH was decreased from 7 to 3. However, the pH variation from 7 to 10 increased the water absorption capacity of most HG, except those containing hydrotalcite (550 °C) at (2:1) and (4:1). The presence of lamellar nanoparticles in hydrogels made the polymer matrix more rigid, and less likely to absorb water. In contrast, HG with hydrotalcite (550 °C) at (2:1) and (4:1) showed anomalous behavior with an increase in their water absorption capacity. The results support that the developed NC-HG can be suitable candidate materials for controlled released applications.-
Descrição: dc.descriptionUniversidade Federal de São Carlos, Rodovia Washington Luiz, km 235-
Descrição: dc.descriptionLaboratório Nacional de Nanotecnologia para o Agronegócio (LNNA) Embrapa Instrumentação, Rua 15 de Novembro 1452-
Descrição: dc.descriptionUniversidade Estadual Paulista Júlio de Mesquita Filho (UNESP) Instituto de Química Avenida Professor Francisco Degni, 55, Jardim Quitandinha-
Descrição: dc.descriptionUniversidade Estadual Paulista Júlio de Mesquita Filho (UNESP), Avenida Brasil, 56-
Descrição: dc.descriptionUniversidade Estadual Paulista Júlio de Mesquita Filho (UNESP) Instituto de Química Avenida Professor Francisco Degni, 55, Jardim Quitandinha-
Descrição: dc.descriptionUniversidade Estadual Paulista Júlio de Mesquita Filho (UNESP), Avenida Brasil, 56-
Idioma: dc.languageen-
Relação: dc.relationJournal of Polymers and the Environment-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectHydrogel-
Palavras-chave: dc.subjectHydrotalcite-
Palavras-chave: dc.subjectMethylcellulose-
Palavras-chave: dc.subjectMontmorillonite-
Palavras-chave: dc.subjectNanocomposites-
Palavras-chave: dc.subjectSwelling degree-
Título: dc.titleEffect of Different Surface-Charged Lamellar Materials on Swelling Properties of Nanocomposite Hydrogels-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

Não existem arquivos associados a este item.