Data/hora: 07/06/2024 09:24:53

Biblioteca(s): | Embrapa Florestas.
Data corrente: | 01/07/2016
Data da última atualização: | 01/07/2016
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
Registro original: | Embrapa Florestas (CNPF)
Exemplares: | CNPF - (55116-1) - UPC - AP - DD -  -  -  - DIS