期刊
EUROPEAN JOURNAL OF PHARMACEUTICAL SCIENCES
卷 49, 期 3, 页码 343-351出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ejps.2013.04.006
关键词
PLGA; Maghemite; Nanospheres
资金
- Capes [DGU 184-09]
- MCI Spain [PHB 2008-0044-PC]
Magnetic nanoparticles have been proposed as interesting tools for biomedical purposes. One of their promising utilization is the MRI in which magnetic substances like maghemite are used in a nanometric size and encapsulated within locally biodegradable nanoparticles. In this work, maghemite has been obtained by a modified sol-gel method and encapsulated in polymer-based nanospheres. The nanospheres have been prepared by single emulsion evaporation method. The different parameters influencing the size, polydispersity index and zeta potential surface of nanospheres were investigated. The size of nanospheres was found to increase as the concentration of PLGA increases, but lower sizes were obtained for 3 min of sonication time and surfactant concentration of 1%. Zeta potential response of magnetic nanospheres towards pH variation was similar to that of maghemite-free nanospheres confirming the encapsulation of maghemite within PLGA nanospheres. The maghemite entrapment efficiency and maghemite content for nanospheres are 12% and 0.59% w/w respectively. (c) 2013 Elsevier B.V. All rights reserved.
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