Laboratory of Analysis, Valorization and Food Safety, Department of Biology, National School of Engineers of Sfax, University of Sfax, Soukra Road, 3038 Sfax, Tunisia.
Laboratory of Analysis, Valorization and Food Safety, Department of Biology, National School of Engineers of Sfax, University of Sfax, Soukra Road, 3038 Sfax, Tunisia.
Int J Biol Macromol. 2021 Jul 31;183:254-266. doi: 10.1016/j.ijbiomac.2021.04.113. Epub 2021 Apr 20.
Active food packaging films based on chitosan and enriched with Artemisia campestris hydroalcoholic extract (ACHE), aqueous extract (ACAE) and essential oil (ACEO) were developed. The effects of incorporating A. campestris were investigated on the physical, mechanical, thermal and antioxidant characteristics of the films. The structural properties of the films were evaluated using Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results showed that adding ACHE and ACEO improved the water resistance of chitosan films. The FTIR spectroscopy analysis revealed covalent interaction and hydrogen bonding between chitosan and ACHE. The XRD and SEM analyses indicated that interactions occurred between the film matrix and A. campestris active compounds, which could be reflected by the physical and mechanical properties of composite films. Incorporating ACHE and ACAE in the chitosan matrix decreased the tensile strength. The film extensibility was reduced when ACHE and ACEO were added. All films exhibited great thermal stability as the degradation occurred above 300 °C. The addition of A. campestris active compounds, particularly extracts, to chitosan films notably increased the antioxidant and UV-Vis barrier properties. Chitosan films enriched with the A. campestris antioxidant compounds could be applied as food packaging alternatives.
基于壳聚糖并富含艾草水醇提取物（ACHE）、水提取物（ACAE）和精油（ACEO）的活性食品包装薄膜被开发出来。研究了掺入艾草对壳聚糖薄膜物理、机械、热和抗氧化特性的影响。使用傅里叶变换红外（FTIR）光谱、X 射线衍射（XRD）和扫描电子显微镜（SEM）评估了薄膜的结构特性。结果表明，添加 ACHE 和 ACEO 提高了壳聚糖薄膜的耐水性。FTIR 光谱分析表明壳聚糖和 ACHE 之间存在共价相互作用和氢键。XRD 和 SEM 分析表明，薄膜基质与艾草活性化合物之间发生了相互作用，这可以通过复合薄膜的物理和机械性能反映出来。在壳聚糖基质中加入 ACHE 和 ACAE 降低了拉伸强度。当添加 ACHE 和 ACEO 时，薄膜的延展性降低。所有薄膜的热稳定性都很好，因为降解发生在 300°C 以上。向壳聚糖薄膜中添加艾草活性化合物，特别是提取物，显著提高了抗氧化和 UV-Vis 阻隔性能。富含艾草抗氧化化合物的壳聚糖薄膜可作为食品包装的替代品。
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