Characterization of methylcellulose produced from sugar cane bagasse cellulose: Crystallinity and thermal properties
Nenhuma Miniatura disponível
Data
2007-02-01
Autores
Rodrigues Filho, Guimes
de Assuncao, Rosana M. N.
Vieira, Julia G.
Meireles, Carla da S.
Cerqueira, Daniel A.
da Silva Barud, Hernane
Ribeiro, Sidney José Lima [UNESP]
Messaddeq, Younes [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Elsevier B.V.
Resumo
In the present work, methylcellulose produced from sugar cane bagasse was characterized by FTIR, WAXD, DTA and TGA techniques. Two samples were synthesized: methylcellulose A and rnethylcellulose B. The only difference in the process was the addition of fresh reactants during the preparation of methylcellulose B. The ratio between the absorption intensities of the C-H stretching band at around 2900 cm(-1) and C-H stretching at around 3400 cm(-1) for methylcellulose B is higher than for methylcellulose A, indicating that methylcellulose B showed an increase in the degree of substitution (DS). Methylcellulose A presents a more heterogeneous structure, which is similar to the original cellulose as seen through FTIR and DTA. Methylcellulose B showed thermal properties similar to commercial methylcellulose. The modification of rnethylcellulose preparation method allows the production of a material with higher DS, crystallinity and thermal stability in relation to the original cellulose and to methylcellulose A. (c) 2006 Elsevier Ltd. All rights reserved.
Descrição
Palavras-chave
sugar cane bagasse, methylcellulose, FTIR, WAXD, DTA/TG
Como citar
Polymer Degradation and Stability. Oxford: Elsevier B.V., v. 92, n. 2, p. 205-210, 2007.