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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: |
17/12/2018 |
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Data da última atualização: |
24/01/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
MILHOMENS, G. C.; ALMEIDA, C. G. de; ZANETTE, R. de S. S.; SOUZA, N. L. G. D. de; MUNK, M.; BRANDAO, H. de M.; OLIVEIRA, L. F. C. de. |
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Afiliação: |
Gabriela Costa Milhomens, Universidade Federal de Tocantins; Camila Guimarães de Almeida; Rafaella de Sousa Salomão Zanette, UFJF; Nelson Luis Gonçalves Dias de Souza, Universidade Federal de Tocantins; Michele Munk, UFJF; HUMBERTO DE MELLO BRANDAO, CNPGL; Luiz Fernando Cappa de Oliveira, UFJF. |
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Título: |
Biocompatibility and adsorption properties of hydrogels obtained by graft polymerization of acrylic acid on cellulose from rice hulls. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Iranian Polymer Journal, v. 27, n. 12, p. 1023-1032, 2018. |
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DOI: |
10.1007/s13726-018-0672-z |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract Hydrogels constitute a group of cross-linked polymeric materials with the capability of swelling and retaining large amounts of water without dissolving. In this work, the hydrogels were obtained by grafting the acrylic acid on cellulose from rice hulls and cross-linking it with glycerol, ethylene glycol, and polyethylene glycol (Mw =200 and 10,000 g mol−1). The samples were characterized using IR and Raman spectroscopy, the absence of the bands at 1636 and 1614 cm−1 (in IR) and at 1659 and 1637 cm−1 (in Raman), in the spectra of grafted cellulose and assigned to ν(C=C), indicated the polymerization process and the absence of the monomer residual. The cross-linking process was verified by the appearance of bands at 1090 cm−1 (IR) and 996 cm−1 (Raman), attributed to ν(C?O?C). Thermogravimetric analysis showed that the cross-linked sample with glycerol presented the lowest thermal stability. The molecular mass of CDClCC-g-AA was 55.56±5.21 kDa with an R2 of 0.9741 and the CDClCC average particle size of 694 nm. The topography and the average roughness of the samples were obtained by atomic force microscopy and the samples that were cross-linked with the polyethylene glycol presented greater roughness. The degree of swelling was lower in the sample cross-linked with ethylene glycol, which was related to its higher degree of cross-linking. Finally, the biocompatibility of the samples was studied by analyzing the toxic effect of the samples on human embryonic kidney cells, where results showed that samples cross-linked with ethylene glycol were non-toxic. MenosAbstract Hydrogels constitute a group of cross-linked polymeric materials with the capability of swelling and retaining large amounts of water without dissolving. In this work, the hydrogels were obtained by grafting the acrylic acid on cellulose from rice hulls and cross-linking it with glycerol, ethylene glycol, and polyethylene glycol (Mw =200 and 10,000 g mol−1). The samples were characterized using IR and Raman spectroscopy, the absence of the bands at 1636 and 1614 cm−1 (in IR) and at 1659 and 1637 cm−1 (in Raman), in the spectra of grafted cellulose and assigned to ν(C=C), indicated the polymerization process and the absence of the monomer residual. The cross-linking process was verified by the appearance of bands at 1090 cm−1 (IR) and 996 cm−1 (Raman), attributed to ν(C?O?C). Thermogravimetric analysis showed that the cross-linked sample with glycerol presented the lowest thermal stability. The molecular mass of CDClCC-g-AA was 55.56±5.21 kDa with an R2 of 0.9741 and the CDClCC average particle size of 694 nm. The topography and the average roughness of the samples were obtained by atomic force microscopy and the samples that were cross-linked with the polyethylene glycol presented greater roughness. The degree of swelling was lower in the sample cross-linked with ethylene glycol, which was related to its higher degree of cross-linking. Finally, the biocompatibility of the samples was studied by analyzing the toxic effect of th... Mostrar Tudo |
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Palavras-Chave: |
Graft polymerization; Hydrogel. |
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Thesaurus Nal: |
Acrylic acid; Biocompatibility; Cellulose; Spectroscopy. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 02500naa a2200277 a 4500
001 2101832
005 2023-01-24
008 2018 bl uuuu u00u1 u #d
024 7 $a10.1007/s13726-018-0672-z$2DOI
100 1 $aMILHOMENS, G. C.
245 $aBiocompatibility and adsorption properties of hydrogels obtained by graft polymerization of acrylic acid on cellulose from rice hulls.$h[electronic resource]
260 $c2018
520 $aAbstract Hydrogels constitute a group of cross-linked polymeric materials with the capability of swelling and retaining large amounts of water without dissolving. In this work, the hydrogels were obtained by grafting the acrylic acid on cellulose from rice hulls and cross-linking it with glycerol, ethylene glycol, and polyethylene glycol (Mw =200 and 10,000 g mol−1). The samples were characterized using IR and Raman spectroscopy, the absence of the bands at 1636 and 1614 cm−1 (in IR) and at 1659 and 1637 cm−1 (in Raman), in the spectra of grafted cellulose and assigned to ν(C=C), indicated the polymerization process and the absence of the monomer residual. The cross-linking process was verified by the appearance of bands at 1090 cm−1 (IR) and 996 cm−1 (Raman), attributed to ν(C?O?C). Thermogravimetric analysis showed that the cross-linked sample with glycerol presented the lowest thermal stability. The molecular mass of CDClCC-g-AA was 55.56±5.21 kDa with an R2 of 0.9741 and the CDClCC average particle size of 694 nm. The topography and the average roughness of the samples were obtained by atomic force microscopy and the samples that were cross-linked with the polyethylene glycol presented greater roughness. The degree of swelling was lower in the sample cross-linked with ethylene glycol, which was related to its higher degree of cross-linking. Finally, the biocompatibility of the samples was studied by analyzing the toxic effect of the samples on human embryonic kidney cells, where results showed that samples cross-linked with ethylene glycol were non-toxic.
650 $aAcrylic acid
650 $aBiocompatibility
650 $aCellulose
650 $aSpectroscopy
653 $aGraft polymerization
653 $aHydrogel
700 1 $aALMEIDA, C. G. de
700 1 $aZANETTE, R. de S. S.
700 1 $aSOUZA, N. L. G. D. de
700 1 $aMUNK, M.
700 1 $aBRANDAO, H. de M.
700 1 $aOLIVEIRA, L. F. C. de
773 $tIranian Polymer Journal$gv. 27, n. 12, p. 1023-1032, 2018.
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Registro original: |
Embrapa Gado de Leite (CNPGL) |
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Biblioteca |
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Origem |
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Cutter |
Registro |
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Registro Completo
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Biblioteca(s): |
Embrapa Arroz e Feijão. |
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Data corrente: |
26/04/2007 |
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Data da última atualização: |
01/10/2010 |
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Tipo da produção científica: |
Documentos |
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Autoria: |
LANNA, A. C.; PINHEIRO, P. V.; BARRIGOSSI, J. A. F.; VILELA, A. F. da C.; BRONDANI, R. P. V.; KOAKUZU, S. N.; FERRARESI, T. M.; SILVA, J. F. A.; PEREIRA, S. H. |
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Afiliação: |
Embrapa Arroz e Feijão. |
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Título: |
Programa de gerenciamento de resíduos de laboratório e campos experimentais na Embrapa Arroz e Feijão. |
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Ano de publicação: |
2005 |
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Fonte/Imprenta: |
Santo Antônio de Goiás: Embrapa Arroz e Feijão, 2005. |
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Páginas: |
36 p. |
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Série: |
(Embrapa Arroz e Feijão. Documentos, 186). |
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Idioma: |
Português |
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Conteúdo: |
O objetivo deste trabalho é apresentar o programa de gerenciamento de resíduos de laboratórios e campos experimentais que está sendo implementado na Embrapa Arroz e Feijão. |
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Palavras-Chave: |
Agrotóxicos; Campos experimentais; Laboratórios; Resíduos. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/CNPAF/25053/1/doc_186.pdf
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Marc: |
LEADER 01033nam a2200277 a 4500
001 1214906
005 2010-10-01
008 2005 bl uuuu u0uu1 u #d
100 1 $aLANNA, A. C.
245 $aPrograma de gerenciamento de resíduos de laboratório e campos experimentais na Embrapa Arroz e Feijão.$h[electronic resource]
260 $aSanto Antônio de Goiás: Embrapa Arroz e Feijão$c2005
300 $a36 p.
490 $a(Embrapa Arroz e Feijão. Documentos, 186).
520 $aO objetivo deste trabalho é apresentar o programa de gerenciamento de resíduos de laboratórios e campos experimentais que está sendo implementado na Embrapa Arroz e Feijão.
653 $aAgrotóxicos
653 $aCampos experimentais
653 $aLaboratórios
653 $aResíduos
700 1 $aPINHEIRO, P. V.
700 1 $aBARRIGOSSI, J. A. F.
700 1 $aVILELA, A. F. da C.
700 1 $aBRONDANI, R. P. V.
700 1 $aKOAKUZU, S. N.
700 1 $aFERRARESI, T. M.
700 1 $aSILVA, J. F. A.
700 1 $aPEREIRA, S. H.
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Embrapa Arroz e Feijão (CNPAF) |
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