Screening of Formulation Variables for the Preparation of Poly(epsilon-caprolactone) Nanocapsules Containing the Local Anesthetic Benzocaine
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Data
2011-03-01
Autores
Moraes, Carolina Morales
de Matos, Angelica Prado
Grillo, Renato [UNESP]
de Melo, Nathalie F. S. [UNESP]
de Paula, Eneida
Dias Filho, Newton Luiz [UNESP]
Rosa, Andre Henrique [UNESP]
Fraceto, Leonardo Fernandes [UNESP]
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Editor
Amer Scientific Publishers
Resumo
In this work we describe the screening of four parameters in the preparation, by nanoprecipitation, of poly(epsilon-caprolactone) nanocapsules, used as a drug carrier system for the local anesthetic, benzocaine. A 2(4-1) factorial experimental design was used to study the influence of four different independent variables (polymer, oily phase, Span 60 and Tween 80) on nanocapsule characteristics (size, polydispersion index, zeta potential) and drug loading capability. Best results were obtained using an aqueous formulation comprising 100 mg of polymer, 200 mg of oily phase, 40 mg of Span 60 and 60 mg of Tween 80 in a final volume of 10 mL which produced a colloidal system with particle size of 188 nm, zeta potential -32 mV, polydispersion index 0.07, and benzocaine association efficiency > 87%. These findings open the way for future clinical studies using such formulations.
Descrição
Palavras-chave
Experimental Design, 2(4-1) Factorial Experimental, Nanoparticles, Polymeric Nanocapsules, Local Anesthetic
Como citar
Journal of Nanoscience and Nanotechnology. Stevenson Ranch: Amer Scientific Publishers, v. 11, n. 3, p. 2450-2457, 2011.