Investigations on the antioxidant and UV-blocking properties of biodegradable chitosan films enriched with MgO nanoparticles and red dragon fruit peel extract

Q1 Environmental Science Bioresource Technology Reports Pub Date : 2024-07-17 DOI:10.1016/j.biteb.2024.101910

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Abstract

The aim of the study is to investigate the synergistic impact of MgO nanoparticles and red dragon fruit peel extract (RFE) on chitosan (CS) biofilm. The CS films were analyzed using FTIR, TGA, ESEM/EDX, XRD, UV-spectra analysis along with contact angle measurement, antioxidant activity, overall migration and biodegradation study. The results showed that as the concentration of RFE increases, improvement in UV-blocking and thermal properties is observed. The FTIR analysis revealed the hydrogen bond interactions among CS, MgO nanoparticles, and RFE. The findings showed that a significant (P < 0.05) increase in 2,2-Diphenyl-1-picrylhydrazyl (DPPH) and 2,2-azino-bis-3-ethylbenzothiazoline-6-sulphonic acid (ABTS) radical scavenging activity, reaching to 37.63 % and 62.83 %, respectively. Also, increase in moisture content, water solubility, and water vapor permeability up to 25.64 %, 38.58 %, and 2.83 × 10⁻¹⁰ g m⁻¹ Pa⁻¹ s⁻¹_, respectively, was found. ESEM images depicted the aggregation of MgO nanoparticles. The films comply with EU 10/2011 safety standards for fatty foods.

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富含纳米氧化镁和红龙果皮提取物的可生物降解壳聚糖薄膜的抗氧化和紫外线阻隔性能研究

本研究旨在探讨氧化镁纳米颗粒和红龙果皮提取物（RFE）对壳聚糖（CS）生物膜的协同影响。研究人员使用傅立叶变换红外光谱（FTIR）、热重分析（TGA）、电子显微镜（ESEM/EDX）、X射线衍射（XRD）、紫外光谱分析以及接触角测量、抗氧化活性、整体迁移和生物降解研究等方法对壳聚糖薄膜进行了分析。结果表明，随着 RFE 浓度的增加，紫外线阻隔性和热性能都有所改善。傅立叶变换红外光谱分析揭示了 CS、氧化镁纳米颗粒和 RFE 之间的氢键相互作用。研究结果表明，2,2-二苯基-1-苦基肼（DPPH）和 2,2-偶氮-双-3-乙基苯并噻唑啉-6-磺酸（ABTS）自由基清除活性明显提高（P < 0.05），分别达到 37.63 % 和 62.83 %。此外，含水量、水溶性和水蒸气渗透性也分别增加到 25.64 %、38.58 % 和 2.83 × 10-10 g m-1 Pa-1 s-1。ESEM 图像显示了氧化镁纳米颗粒的聚集。薄膜符合欧盟 10/2011 脂肪食品安全标准。

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