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Please use this identifier to cite or link to this item: http://repositorio.ufba.br/ri/handle/ri/15614

Title: Application of cellulose sulfoacetate obtained from sugarcane bagasse as an additive in mortars
Other Titles: Journal of Applied Polymer Science
Authors: Cerqueira, Daniel Alves
Nascimento, Bárbara
Rodrigues Filho, Guimes
Frigoni, Elaine Selaro
Soares, Heline Mendes
Meireles, Carla da Silva
Cerqueira, Daniel Alves
Valente, Artur José Monteiro
Keywords: Additives;Biodegradable;Water-soluble polymers
Issue Date: 2012
Abstract: In this study, cellulose sulfoacetate (CSA) was produced with cellulose extracted from sugarcane bagasse with sulfuric acid as a catalyst under homogenous conditions so that the derivative could be applied as an additive for mortar of Portland (Cimento Portland de alta resistência inicial, CPV-ARI) cement. The IR spectra showed that only precipitate C presented the characteristic band of sulfate groups (807 cm−1) and was, therefore, the sulfoacetylated derivative. CSA presented a degree of acetylation of 2.70 and a degree of sulfonation of 0.063, and the presence of sulfate groups in the derivative displaced the position of C(6) to a lower field in the 13C-NMR spectrum and influenced reduced viscosity as a function of concentration. The evaluation of CSA as an additive showed that for a polymer/cement ratio of 0.6%, an increase of 13.80% was achieved consistently, and an increase of 21.05% in the potential tensile of adhesion strength was also achieved.
Description: Texto completo: acesso restrito. p. 510–517
URI: http://repositorio.ufba.br/ri/handle/ri/15614
ISSN: 0021-8995
Appears in Collections:Artigos Publicados em Periódicos (ICADS)

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