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Please use this identifier to cite or link to this item: http://repositorio.ufba.br/ri/handle/ri/5427

Title: Release of doxycycline through cellulose acetate symmetric and asymmetric membranes produced from recycled agroindustrial residue: Sugarcane bagasse
Other Titles: Industrial Crops and Products
Authors: 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
Keywords: Controlled-release;Doxycycline;Cellulose triacetate;Sugarcane bagasse;Symmetric and asymmetric membranes
Issue Date: May-2011
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.
Description: Acesso restrito: Texto completo. p. 566–571.
URI: http://www.repositorio.ufba.br/ri/handle/ri/5427
ISSN: 0926-6690
Appears in Collections:Artigos Publicados em Periódicos (ICADS)

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