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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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| 1. |  | AMARAL, T. F.; GRÁZIA, J. G. V.; GONELLA-DIAZA, A. M.; MARTINHÃO, L. A. G.; HEREDIA, D.; MELO, G. D.; POHLER, K. G.; ESTRADA-CORTÉS, E.; DIKMEN, S.; SOSA, F.; JENSEN, L. M.; SANG, L.; SIQUEIRA, L. G. B.; VIANA, J. H. M.; HANSEN, P. J. Actions of DKK1 on the bovine embryo during the morula-to-blastocyst stage of development on pregnancy outcomes and placental hormone secretion after embryo transfer. Reproduction, Fertility and Development, v. 34, n. 2, p. 279, 2022. Edição dos abstracts da Annual Conference of the International Embryo Transfer Society, 48., Savannah, Geórgia, 2022.| Tipo: Resumo em Anais de Congresso |
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