蒙脱石
海藻酸钙
DPPH
聚合物
扫描电子显微镜
化学工程
热重分析
吸附
化学
混合材料
精油
傅里叶变换红外光谱
材料科学
核化学
钙
色谱法
有机化学
抗氧化剂
复合材料
工程类
作者
Doha Berraaouan,Kamal Essifi,Mohamed Addi,Christophe Hano,Marie‐Laure Fauconnier,Abdesselam Tahani
出处
期刊:Polymers
[MDPI AG]
日期:2023-02-07
卷期号:15 (4): 823-823
标识
DOI:10.3390/polym15040823
摘要
The foremost objective of this work is to assess the microcapsules composition (polymer-based and polymer/clay-based) effect, on the release of rosemary essential oil into w/o medium and evaluate their antioxidant activity. Calcium alginate (CA) and calcium alginate/montmorillonite hybrid (CA-MTN) microcapsules were developed following an ionotropic crosslinking gelation and were used as host materials for the encapsulation of rosemary essential oil. The unloaded/loaded CA and hybrid CA-MTN microcapsules were characterized by Fourier transform infra-red (FT-ATR) spectroscopy, thermal analysis (TGA), scanning electron microscopy (SEM) and DPPH assay. The evaluation of the microcapsule’s physicochemical properties has shown that the clay filling with montmorillonite improved the microcapsule’s properties. The encapsulation efficiency improved significantly in hybrid CA-MTN microcapsules and exhibited higher values ranging from 81 for CA to 83% for hybrid CA-MTN and a loading capacity of 71 for CA and 73% for hybrid CA-MTN, owing to the large adsorption capacity of the sodic clay. Moreover, the hybrid CA-MTN microcapsules showed a time-extended release of rosemary essential oil compared to CA microcapsules. Finally, the DPPH assay displayed a higher reduction of free radicals in hybrid CA-MNT-REO (12.8%) than CA-REO (10%) loaded microcapsules. These results proved that the clay–alginate combination provides microcapsules with enhanced properties compared to the polymer-based microcapsules.
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