https://repositorio.ufba.br/handle/ri/15614
Tipo: | Artigo de Periódico |
Título: | Application of cellulose sulfoacetate obtained from sugarcane bagasse as an additive in mortars |
Título(s) alternativo(s): | Journal of Applied Polymer Science |
Autor(es): | 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 |
Autor(es): | 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 |
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. |
Palavras-chave: | Additives Biodegradable Water-soluble polymers |
Tipo de Acesso: | Acesso Aberto |
URI: | http://repositorio.ufba.br/ri/handle/ri/15614 |
Data do documento: | 2011 |
Aparece nas coleções: | Artigo Publicado em Periódico (ICADS) |
Arquivo | Descrição | Tamanho | Formato | |
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Daniel Alves Cerqueira.pdf | 1,51 MB | Adobe PDF | Visualizar/Abrir |
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