期刊
CARBOHYDRATE POLYMERS
卷 89, 期 4, 页码 1277-1282出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2012.04.048
关键词
Chitosan; Cashew gum; Nanogel; Characterization; Essential oil
资金
- Brazilian Governmental Agency CNPq
- Brazilian Governmental Agency CAPES
- Brazilian Governmental Agency Banco do Nordeste - BNB
- FUNCAP
- INOMAT (National Institute for Science, Technology and Innovation on Functional Complex Materials)
Nanogels based on chitosan and cashew gum were prepared and loaded with Lippia sidoides oil. Several parameters such as cashew gum concentration and relative oil content in the matrix had their influence on nanogel properties investigated. Nanogels were characterized regarding their morphologies, particle size distributions, zeta potential, Fourier transform infrared spectroscopy and essential oil contents. The release profile was investigated by UV/vis spectroscopy and its efficacy was determined through bioassays. Results showed that samples designed using relative ratios matrix:oil 10:2, gum:chitosan 1:1 and 5% gum concentration showed high loading (11.8%) and encapsulation efficiency (70%). Nanogels were found to exhibit average sizes in the range 335-558 nm. In vitro release profiles showed that nanoparticles presented slower and sustained release. Bioassays showed that larval mortality was related mainly to oil loading, with samples presenting more effective larvicide efficacies than the pure L. sidoides oil. (C) 2012 Elsevier Ltd. All rights reserved.
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