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 | Acesso ao texto completo restrito à biblioteca da Embrapa Florestas. Para informações adicionais entre em contato com cnpf.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
01/07/2016 |
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Data da última atualização: |
01/07/2016 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
LENGOWSKI, E. C.; MAGALHAES, W. L. E.; NISGOSKI, S.; BOLZON DE MUNIZ, G. I.; SATYANARAYANA, K. G.; LAZZAROTTO, M. |
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Afiliação: |
Elaine Cristina Lengowski, UFPR; WASHINGTON LUIZ ESTEVES MAGALHAES, CNPF; Silvana Nisgoski, UFPR; Graciela Inês Bolzon de Muniz, UFPR; Kestur Gundappa Satyanarayana, Pesquisador visitante na Embrapa Florestas; MARCELO LAZZAROTTO, CNPF. |
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Título: |
New and improved method of investigation using thermal tools for characterization of cellulose from eucalyptus pulp. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Thermochimica Acta, v. 638, p. 44-51, Aug. 2016. |
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DOI: |
http://dx.doi.org/10.1016/j.tca.2016.06.010 |
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Idioma: |
Inglês |
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Conteúdo: |
Despite cellulose being the most abundant biopolymer on earth and an important commodity, thereis a lack of deeper knowledge about its structure as well as faster and more efficient characterizationtechniques. This paper presents preparation of nanocellulose from bleached cellulose pulp of Eucalyptusby chemical and mechanical pre-treatments, while the cellulose was given treatment to obtain a greatrange of crystallinity index. The nanocellulose is characterized by X-ray diffraction to evaluate Segal?sindex while chemometric tools by TGA and DTA were used to predict Segal?s index. DTA curves, alongwith multivariate statistical model, presented better result than TGA. The coefficient of variation andstandard error of prediction for the proposed models using external validation samples were in therange of 0.91?0.96 and 4.18?8.71, respectively. These successful mathematical models are discussed bycorrelating them with the observed characteristics of cellulose. |
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Palavras-Chave: |
Chemometric analysis; Difração de raio X; Nanocellulose; Nanocelulose; Nanotecnologia; Segal's index; Validation. |
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Thesagro: |
Celulose; Eucalipto; Polpa. |
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Thesaurus Nal: |
Cellulose; Cellulosic materials; Eucalyptus; Nanotechnology; Pulp; Thermal analysis; X-ray diffraction. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 02124naa a2200397 a 4500
001 2048124
005 2016-07-01
008 2016 bl uuuu u00u1 u #d
024 7 $ahttp://dx.doi.org/10.1016/j.tca.2016.06.010$2DOI
100 1 $aLENGOWSKI, E. C.
245 $aNew and improved method of investigation using thermal tools for characterization of cellulose from eucalyptus pulp.$h[electronic resource]
260 $c2016
520 $aDespite cellulose being the most abundant biopolymer on earth and an important commodity, thereis a lack of deeper knowledge about its structure as well as faster and more efficient characterizationtechniques. This paper presents preparation of nanocellulose from bleached cellulose pulp of Eucalyptusby chemical and mechanical pre-treatments, while the cellulose was given treatment to obtain a greatrange of crystallinity index. The nanocellulose is characterized by X-ray diffraction to evaluate Segal?sindex while chemometric tools by TGA and DTA were used to predict Segal?s index. DTA curves, alongwith multivariate statistical model, presented better result than TGA. The coefficient of variation andstandard error of prediction for the proposed models using external validation samples were in therange of 0.91?0.96 and 4.18?8.71, respectively. These successful mathematical models are discussed bycorrelating them with the observed characteristics of cellulose.
650 $aCellulose
650 $aCellulosic materials
650 $aEucalyptus
650 $aNanotechnology
650 $aPulp
650 $aThermal analysis
650 $aX-ray diffraction
650 $aCelulose
650 $aEucalipto
650 $aPolpa
653 $aChemometric analysis
653 $aDifração de raio X
653 $aNanocellulose
653 $aNanocelulose
653 $aNanotecnologia
653 $aSegal's index
653 $aValidation
700 1 $aMAGALHAES, W. L. E.
700 1 $aNISGOSKI, S.
700 1 $aBOLZON DE MUNIZ, G. I.
700 1 $aSATYANARAYANA, K. G.
700 1 $aLAZZAROTTO, M.
773 $tThermochimica Acta$gv. 638, p. 44-51, Aug. 2016.
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| Registros recuperados : 5 | |
| 4. |  | LIMA, A. de A.; CALDAS, R. C.; BORGES, A. L.; RITZINGER, C. H. S. P.; TRINDADE, A. V.; PIRES, M. de M.; MIDLEJ, M. M. B. C.; MATA, H. T. da C. Cultivos intercalares e controle de plantas daninhas em plantios de maracujá amarelo - II. Cruz das Almas: Embrapa Mandioca e Fruticultura, 2003. 4 p. ( Embrapa Mandioca e Fruticultura. Comunicado Técnico, 89).| Biblioteca(s): Embrapa Mandioca e Fruticultura. |
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| 5. | | LIMA, A. de A.; CALDAS, R. C.; BORGES, A. L.; RITZINGER, C. H. S. P.; TRINDADE, A. V.; PIRES, M. de M.; MIDLEJ, M. M. B. C.; MATA, H. T. da C. Cultivos intercalares e controle de plantas daninhas em plantios de maracujá amarelo. Cruz das Almas: Embrapa Mandioca e Fruticultura Tropical, 2003. 1 CD-ROM. (Embrapa Mandioca e Fruticultura. Boletim de Pesquisa e Desenvolvimento, 29).| Biblioteca(s): Embrapa Mandioca e Fruticultura. |
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| Registros recuperados : 5 | |
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