| |
|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Gado de Leite. Para informações adicionais entre em contato com cnpgl.biblioteca@embrapa.br. |
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Gado de Leite. |
|
Data corrente: |
17/12/2018 |
|
Data da última atualização: |
24/01/2023 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
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. |
|
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. |
|
Título: |
Biocompatibility and adsorption properties of hydrogels obtained by graft polymerization of acrylic acid on cellulose from rice hulls. |
|
Ano de publicação: |
2018 |
|
Fonte/Imprenta: |
Iranian Polymer Journal, v. 27, n. 12, p. 1023-1032, 2018. |
|
DOI: |
10.1007/s13726-018-0672-z |
|
Idioma: |
Inglês |
|
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 |
|
Palavras-Chave: |
Graft polymerization; Hydrogel. |
|
Thesaurus Nal: |
Acrylic acid; Biocompatibility; Cellulose; Spectroscopy. |
|
Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
|
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.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Gado de Leite (CNPGL) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
| Acesso ao texto completo restrito à biblioteca da Embrapa Arroz e Feijão. Para informações adicionais entre em contato com cnpaf.biblioteca@embrapa.br. |
Registro Completo
|
Biblioteca(s): |
Embrapa Arroz e Feijão. |
|
Data corrente: |
18/02/2010 |
|
Data da última atualização: |
06/05/2010 |
|
Tipo da produção científica: |
Capítulo em Livro Técnico-Científico |
|
Autoria: |
COBUCCI, T. |
|
Afiliação: |
TARCISIO COBUCCI, CNPAF. |
|
Título: |
Manejo das plantas daninhas. |
|
Ano de publicação: |
2009 |
|
Fonte/Imprenta: |
In: KLUTHCOUSKI, J.; STONE, L. F.; AIDAR, H. (Ed.). Fundamentos para uma agricultura sustentável, com ênfase na cultura do feijoeiro. Santo Antônio de Goiás: Embrapa Arroz e Feijão, 2009. |
|
Páginas: |
p. 249-267. |
|
ISBN: |
978-85-7437-033-0 |
|
Idioma: |
Português |
|
Conteúdo: |
Aspectos gerais. Manejo das plantas daninhas com herbicidas. Manejo cultural das plantas daninhas. |
|
Palavras-Chave: |
Planta daninha. |
|
Thesagro: |
Erva daninha; Feijão; Phaseolus vulgaris. |
|
Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
|
Marc: |
LEADER 00721naa a2200193 a 4500
001 1658131
005 2010-05-06
008 2009 bl uuuu u00u1 u #d
020 $a978-85-7437-033-0
100 1 $aCOBUCCI, T.
245 $aManejo das plantas daninhas.
260 $c2009
300 $ap. 249-267.
520 $aAspectos gerais. Manejo das plantas daninhas com herbicidas. Manejo cultural das plantas daninhas.
650 $aErva daninha
650 $aFeijão
650 $aPhaseolus vulgaris
653 $aPlanta daninha
773 $tIn: KLUTHCOUSKI, J.; STONE, L. F.; AIDAR, H. (Ed.). Fundamentos para uma agricultura sustentável, com ênfase na cultura do feijoeiro. Santo Antônio de Goiás: Embrapa Arroz e Feijão, 2009.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Arroz e Feijão (CNPAF) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
