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Registro Completo |
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
22/06/2021 |
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Data da última atualização: |
10/06/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
PFEIFER, M.; ANDRADE, F. A. C.; BORTOLLETTO-SANTOS, R.; AOUADA, F. A.; RIBEIRO, C. |
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Afiliação: |
CAUE RIBEIRO DE OLIVEIRA, CNPDIA. |
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Título: |
Effect of different surface?charged lamellar materials on swelling properties of nanocomposite hydrogels. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Journal of Polymers and the Environment, v. 29, 2021. |
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Páginas: |
3311?3323 |
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DOI: |
https://doi.org/10.1007/s10924-021-02120-7 |
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Idioma: |
Inglês |
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Conteúdo: |
This study investigated the efect of diferent surface-charged lamellar materials on the swelling and difusion 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 afected 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 |
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Palavras-Chave: |
Hydrogel; Swelling degree. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02045naa a2200217 a 4500
001 2132501
005 2022-06-10
008 2021 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1007/s10924-021-02120-7$2DOI
100 1 $aPFEIFER, M.
245 $aEffect of different surface?charged lamellar materials on swelling properties of nanocomposite hydrogels.$h[electronic resource]
260 $c2021
300 $a3311?3323
520 $aThis study investigated the efect of diferent surface-charged lamellar materials on the swelling and difusion 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 afected 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
653 $aHydrogel
653 $aSwelling degree
700 1 $aANDRADE, F. A. C.
700 1 $aBORTOLLETTO-SANTOS, R.
700 1 $aAOUADA, F. A.
700 1 $aRIBEIRO, C.
773 $tJournal of Polymers and the Environment$gv. 29, 2021.
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| 2. |  | GOMES, J. E.; PERECIN, D.; MARTINS, A. B. G.; ALMEIDA, E. J. de. Variabilidade fenotípica em genótipos de acerola. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 35, n. 11, p. 2205-11, nov. 2000. Título em inglês: Phenotypic variability in West Indian cherry genotypes.| Biblioteca(s): Embrapa Unidades Centrais. |
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| 4. | | CASTRO, J. M. da C. e; RIBEIRO, J. M.; RIBEIRO JUNIOR, P. M.; ALMEIDA, E. J. de; SOUSA, A. D. de; OLIVEIRA, P. G. de. Reprodução do nematoide-das-galhas da goiabeira em acessos de Psidium. Comunicata Scientiae, v. 8, n. 1, p. 149-154, 2017.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
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