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 | Acesso ao texto completo restrito à biblioteca da Embrapa Gado de Leite. Para informações adicionais entre em contato com cnpgl.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Gado de Leite. |
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Data corrente: |
06/01/2020 |
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Data da última atualização: |
06/02/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
CARMO, I. A. D.; ALMEIDA, C. G. de; BRANDAO, H. de M.; OLIVEIRA, L. F. C. de; SOUZA, N. L. G. D. de. |
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Afiliação: |
Iago Aguiar Dias Carmo; Camila Guimarães de Almeida; HUMBERTO DE MELLO BRANDAO, CNPGL; Luiz Fernando Cappa de Oliveira; Nelson Luis Gonçalves Dias de Souza. |
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Título: |
Experimental planning applied to the synthesis of superabsorbent polymer by acrylic acid graft in pectin extracted from passion fruit peel. |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
Materials Research Express, v. 6, n. 9, 095328, 2019. |
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DOI: |
https://doi.org/10.1088/2053-1591/ab332f |
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Idioma: |
Inglês |
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Conteúdo: |
Superabsorbent hydrogels are three-dimensional matrices made up of linear or branched hydrophilic polymers, have chemical or physical crosslinking, and can absorb large amounts of water. Herein we used experimental planning to optimize the synthesis of superabsorbent polymers from pectin extracted from passion fruit peel, grafted with polyacrylic acid and crosslinked with N,N?-methylenebis-acrylamide. The chemical structures of the polymers were analyzed by infrared and Raman spectroscopy. The spectra obtained prove the polymerization reaction, the graft and the absence of residual monomers. The experimental planning allowed the establishment of the optimum synthesis conditions for the best water absorption and urea and Cu2+ adsorption properties. For this purpose, we used the degree of monomer neutralization and the percentages of pectin, crosslinking agent, and initiator, as variables. The kinetic studies for Cu2+ adsorption showed that the predominant mechanism was pseudo-second order. Finally, atomic force microscopy showed the topography of the materials and the presence of cavities only in the sample with the best urea-adsorption capacity. |
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Palavras-Chave: |
Cu(II); Superabsorbent hydrogel; Swelling. |
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Thesaurus Nal: |
Adsorption; Urea. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01946naa a2200241 a 4500
001 2118181
005 2024-02-06
008 2019 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1088/2053-1591/ab332f$2DOI
100 1 $aCARMO, I. A. D.
245 $aExperimental planning applied to the synthesis of superabsorbent polymer by acrylic acid graft in pectin extracted from passion fruit peel.$h[electronic resource]
260 $c2019
520 $aSuperabsorbent hydrogels are three-dimensional matrices made up of linear or branched hydrophilic polymers, have chemical or physical crosslinking, and can absorb large amounts of water. Herein we used experimental planning to optimize the synthesis of superabsorbent polymers from pectin extracted from passion fruit peel, grafted with polyacrylic acid and crosslinked with N,N?-methylenebis-acrylamide. The chemical structures of the polymers were analyzed by infrared and Raman spectroscopy. The spectra obtained prove the polymerization reaction, the graft and the absence of residual monomers. The experimental planning allowed the establishment of the optimum synthesis conditions for the best water absorption and urea and Cu2+ adsorption properties. For this purpose, we used the degree of monomer neutralization and the percentages of pectin, crosslinking agent, and initiator, as variables. The kinetic studies for Cu2+ adsorption showed that the predominant mechanism was pseudo-second order. Finally, atomic force microscopy showed the topography of the materials and the presence of cavities only in the sample with the best urea-adsorption capacity.
650 $aAdsorption
650 $aUrea
653 $aCu(II)
653 $aSuperabsorbent hydrogel
653 $aSwelling
700 1 $aALMEIDA, C. G. de
700 1 $aBRANDAO, H. de M.
700 1 $aOLIVEIRA, L. F. C. de
700 1 $aSOUZA, N. L. G. D. de
773 $tMaterials Research Express$gv. 6, n. 9, 095328, 2019.
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Registro original: |
Embrapa Gado de Leite (CNPGL) |
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Origem |
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Cutter |
Registro |
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Registro Completo
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
18/06/2020 |
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Data da última atualização: |
18/06/2020 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 3 |
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Autoria: |
MALAQUIAS, J. V.; CONCEIÇÃO, L. D. H. C. S. DA; BRAGA, M. F.; JUNQUEIRA, N. T. V. |
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Afiliação: |
JUACI VITORIA MALAQUIAS, CPAC; LEO DUC HAA CARSON SCHWARTZHAUPT DA, CNPUV; MARCELO FIDELES BRAGA, CPAC; NILTON TADEU VILELA JUNQUEIRA, CPAC. |
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Título: |
Macauba production estimated by regression models. |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
Científica, v. 47, n. 4, p. 419?425, 2019. |
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Páginas: |
p. 419-425 |
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Idioma: |
Português |
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Thesagro: |
Biomassa; Espécie Nativa; Macaúba; Óleo Vegetal; Vegetação Nativa. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/214065/1/Juaci-macauba-production-estimated.pdf
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Marc: |
LEADER 00612naa a2200217 a 4500
001 2123350
005 2020-06-18
008 2019 bl uuuu u00u1 u #d
100 1 $aMALAQUIAS, J. V.
245 $aMacauba production estimated by regression models.$h[electronic resource]
260 $c2019
300 $ap. 419-425
650 $aBiomassa
650 $aEspécie Nativa
650 $aMacaúba
650 $aÓleo Vegetal
650 $aVegetação Nativa
700 1 $aCONCEIÇÃO, L. D. H. C. S. DA
700 1 $aBRAGA, M. F.
700 1 $aJUNQUEIRA, N. T. V.
773 $tCientífica$gv. 47, n. 4, p. 419?425, 2019.
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Embrapa Cerrados (CPAC) |
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