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Use este identificador para citar ou linkar para este item: https://repositorio.ufba.br/handle/ri/5427
Tipo: Artigo de Periódico
Título: Release of doxycycline through cellulose acetate symmetric and asymmetric membranes produced from recycled agroindustrial residue: Sugarcane bagasse
Título(s) alternativo(s): Industrial Crops and Products
Autor(es): Rodrigues Filhoa, Guimes
Ribeiro, Sabrina Dias
Meireles, Carla da Silva
Silva, Leandro Gustavo da
Ruggiero, Reinaldo
Ferreira Júnior, Moacir Fernandes
Cerqueira, Daniel Alves
Assunção, Rosana Maria Nascimento de
Zeni, Mara
Polleto, Patricia
Autor(es): Rodrigues Filhoa, Guimes
Ribeiro, Sabrina Dias
Meireles, Carla da Silva
Silva, Leandro Gustavo da
Ruggiero, Reinaldo
Ferreira Júnior, Moacir Fernandes
Cerqueira, Daniel Alves
Assunção, Rosana Maria Nascimento de
Zeni, Mara
Polleto, Patricia
Abstract: Cellulose acetate is one of the components employed in drug controlled-release systems in the form of membranes. The aim of this study was to examine the controlled-release of doxycycline employing cellulose acetate symmetric and asymmetric membranes as matrices. The cellulose triacetate was produced from sugarcane bagasse through a homogeneous acetylation reaction, using acetic acid as the solvent,acetic anhydride as the acetylating agent and sulfuric acid as the catalyst. The viscosity average molecular weight of the cellulose acetate produced was 39,000 g mol−1. The symmetric membranes were produced using a system solvent of dichloromethane/ethanol (9:1, v/v) and the asymmetric membranes were produced from the same solvent system and 10% of water. For the formulation of both, 5% of doxycycline was used. The membranes were characterized by thermal analysis (DSC and TGA) and scanning electron microscopy SEM. The release of doxycycline through cellulose triacetate matrices was examined using spectrophotometric analysis in the ultraviolet–visible region, at 275 nm. The results revealed that asymmetric membranes release 80% of the drug in 100 min, while symmetric membranes release 14% of the drug during the same time interval.
Palavras-chave: Controlled-release
Doxycycline
Cellulose triacetate
Sugarcane bagasse
Symmetric and asymmetric membranes
URI: http://www.repositorio.ufba.br/ri/handle/ri/5427
Data do documento: Mai-2011
Aparece nas coleções:Artigo Publicado em Periódico (ICADS)

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