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Registro Completo |
Biblioteca(s): |
Embrapa Florestas. |
Data corrente: |
01/07/2016 |
Data da última atualização: |
01/07/2016 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
LENGOWSKI, E. C.; MAGALHAES, W. L. E.; NISGOSKI, S.; BOLZON DE MUNIZ, G. I.; SATYANARAYANA, K. G.; LAZZAROTTO, M. |
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. |
Título: |
New and improved method of investigation using thermal tools forcharacterization of cellulose from eucalypts pulp. |
Ano de publicação: |
2016 |
Fonte/Imprenta: |
Thermochimica Acta, v. 638, p. 44-51, Aug. 2016. |
DOI: |
http://dx.doi.org/10.1016/j.tca.2016.06.010 |
Idioma: |
Inglês |
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. |
Palavras-Chave: |
Chemometric analysis; Difração de raio X; Nanocellulose; Nanocelulose; Nanotecnologia; Segal's index; Validation. |
Thesagro: |
Celulose; Eucalipto; Polpa. |
Thesaurus Nal: |
Cellulose; Cellulosic materials; Eucalyptus; Nanotechnology; Pulp; Thermal analysis; X-ray diffraction. |
Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
Marc: |
LEADER 02122naa 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 $aNew and improved method of investigation using thermal tools forcharacterization of cellulose from eucalypts pulp.$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 : 64 | |
61. | | LOURENÇON, T. V.; LIMA, G. G. de; RIBEIRO, C. S. P.; HANSEL, F. A.; MACIEL, G. M.; SILVA, K. da; WINNISCHOFER, S. M. B.; BOLZON DE MUNIZ, G. I.; MAGALHAES, W. L. E. Antioxidant, antibacterial and antitumoural activities of kraft lignin fromhardwood fractionated by acid precipitation. International Journal of Biological Macromolecules, v. 166, p. 1535-1542, Jan. 2021.Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
Biblioteca(s): Embrapa Florestas. |
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62. | | MAGALHAES, W. L. E.; CADEMARTORI, P. H. G. de; BOLZON DE MUNIZ, G. I.; CARNEIRO, M. E.; LENGOWSKI, E. C.; MATTOS, B. D.; LOURENÇON, T. V.; VIANA, L. C.; KUMODE, M. M. N. Nanotechnology applied to forest sector: some researches at Embrapa Forestry. In: CANADA - BRAZIL WORKSHOP ON SUSTAINABLE NANOMATERIALS, 3., 2014, Belo Horizonte. General program. [S.l.]: Ministério da Ciência e Tecnologia, 2014. p. 14. Abstract.Tipo: Resumo em Anais de Congresso |
Biblioteca(s): Embrapa Florestas. |
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63. | | PASTORE, T. C. M.; BRAGA, J. W. B.; CORADIN, V. T. R.; MAGALHAES, W. L. E.; OKINO, E. Y. A.; CAMARGOS, J. A. A.; BOLZON DE MUÑIZ, G. I.; BRESSAN, O. A.; DAVRIEUX, F. Near infrared spectroscopy (NIRS) as a potential tool for monitoring trade of similar woods: discrimination of true mahogany, cedar, andiroba, and curupixa. Holzforschung, v. 65, p. 73-80, 2011.Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
Biblioteca(s): Embrapa Florestas. |
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64. | | PASTORE, T. C. M.; BRAGA, J. W. B.; CORADIN, V. T. R.; MAGALHAES, W. L. E.; OKINO, E. Y. A.; CAMARGOS, J. A. A.; BOLZON DE MUÑIZ, G. I.; DAVRIEUX, F.; BRESSAN, O. A. NIRS a potential tool for monitoring harvesting and trade of similar woods: a case study for discrimination of mahogany, cedar, and crabwood. In: CONGRESO FORESTAL MUNDIAL, 13., 2009, Buenos Aires. Desarrollo forestal: equilibrio vital. Argentina: FAO, 2009. Resumo.Tipo: Resumo em Anais de Congresso |
Biblioteca(s): Embrapa Florestas. |
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Registros recuperados : 64 | |
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