|
Registro Completo |
|
Biblioteca(s): |
Embrapa Florestas. |
|
Data corrente: |
11/11/2019 |
|
Data da última atualização: |
10/06/2020 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Autoria: |
MALUCELLI, L. C.; LOMONACO, D.; CARVALHO FILHO, M. A. S.; MAGALHAES, W. L. E. |
|
Afiliação: |
Lucca C. Malucelli, Universidade Posistivo; Diego Lomonaco, Universidade Federal do Ceará; Marco A. S. Carvalho Filho, Universidade Positivo; WASHINGTON LUIZ ESTEVES MAGALHAES, CNPF. |
|
Título: |
Cellulose triacetate from different sources: modification assessment through thermal and chemical characterization. |
|
Ano de publicação: |
2020 |
|
Fonte/Imprenta: |
Holzforschung, v. 74, n. 5, p. 505-512, 2020. |
|
DOI: |
https://doi.org/10.1515/hf-2019-0035 |
|
Idioma: |
Inglês |
|
Conteúdo: |
Modification techniques have been widely employed to improve cellulose properties, thus increasing the diversity of industrial applications. While wood pulp cellulose is the most common source for industrial production, little has been studied about the effects of the cellulose source and its purity on modification. Therefore, this article investigates the influence of cellulose source (e.g. wood or cotton) on its modification (acetylation), by estimating the obtained degree of substitution (DS) through Fourier-transform infrared (FT-IR), proton nuclear magnetic resonance (1H NMR) and back titration. The intense reduction in samples? crystallinity after acetylation was a result of breakage of inter- and intra-molecular hydrogen bonds, thus confirming acetylation. Although Avicel showed the highest cellulose content and was virtually free of hemicellulose and lignin, this did not affect the acetylation degree, as all samples were successfully triacetylated. The techniques used in this study were ideal for detecting acetylation and estimating the DS, which makes them good tools for modification studies of cellulose derivatives. |
|
Palavras-Chave: |
Acetato de celulose; Acetilação; Cellulose derivatives; Derivados de celulose; Esterificação. |
|
Thesaurus Nal: |
Acetylation; Cellulose acetate; Esterification. |
|
Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
|
Marc: |
LEADER 01983naa a2200265 a 4500
001 2114147
005 2020-06-10
008 2020 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1515/hf-2019-0035$2DOI
100 1 $aMALUCELLI, L. C.
245 $aCellulose triacetate from different sources$bmodification assessment through thermal and chemical characterization.$h[electronic resource]
260 $c2020
520 $aModification techniques have been widely employed to improve cellulose properties, thus increasing the diversity of industrial applications. While wood pulp cellulose is the most common source for industrial production, little has been studied about the effects of the cellulose source and its purity on modification. Therefore, this article investigates the influence of cellulose source (e.g. wood or cotton) on its modification (acetylation), by estimating the obtained degree of substitution (DS) through Fourier-transform infrared (FT-IR), proton nuclear magnetic resonance (1H NMR) and back titration. The intense reduction in samples? crystallinity after acetylation was a result of breakage of inter- and intra-molecular hydrogen bonds, thus confirming acetylation. Although Avicel showed the highest cellulose content and was virtually free of hemicellulose and lignin, this did not affect the acetylation degree, as all samples were successfully triacetylated. The techniques used in this study were ideal for detecting acetylation and estimating the DS, which makes them good tools for modification studies of cellulose derivatives.
650 $aAcetylation
650 $aCellulose acetate
650 $aEsterification
653 $aAcetato de celulose
653 $aAcetilação
653 $aCellulose derivatives
653 $aDerivados de celulose
653 $aEsterificação
700 1 $aLOMONACO, D.
700 1 $aCARVALHO FILHO, M. A. S.
700 1 $aMAGALHAES, W. L. E.
773 $tHolzforschung$gv. 74, n. 5, p. 505-512, 2020.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Florestas (CNPF) |
|
