Chitosan/cashew gum nanogels for essential oil encapsulation

被引：157
作者：
Abreu, Flavia O. M. S. [1 ]
Oliveira, Erick F. [1 ]
Paula, Haroldo C. B. [1 ]
de Paula, Regina C. M. [2 ]
机构：
[1] Univ Fed Ceara, Dept Analyt & Phys Chem, UFC, Fortaleza, Ceara, Brazil
[2] Univ Fed Ceara, Dept Organ & Inorgan Chem, UFC, Fortaleza, Ceara, Brazil
来源：
CARBOHYDRATE POLYMERS | 2012年 / 89卷 / 04期
关键词：
Chitosan; Cashew gum; Nanogel; Characterization; Essential oil; NANOPARTICLES; MICROSPHERES; PRESERVATION; ALGINATE; RELEASE;
D O I：
10.1016/j.carbpol.2012.04.048
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
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.
引用
收藏
页码：1277 / 1282
页数：6
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