Incorporation of betel leaf extract (BE) into chitosan and chitosan/vanillin (CH/Vn) blend films was carried out in order to improve the mechanical, thermal and antimicrobial properties of chitosan films. The influence of morphology, crystallinity and glass transition temperature (T _g) on the mechanical properties of chitosan/betel leaf extract (CH/BE) and chitosan/vanillin/betel leaf extract (CH/Vn/BE) films was analyzed. The smooth homogeneous morphology, decreased crystallinity and shift of T _g to a higher value resulted in improved mechanical properties. Scanning electron microscopy, atomic force microscopy, X-ray diffraction, differential scanning calorimetry, thermogravimetric analysis and Fourier transform infrared studies indicated that inclusion of BE into CH/Vn led to enhanced physicochemical properties. The results of antimicrobial activity, oxygen gas permeability and contact angle measurements confirmed the significantly improved activity and hydrophilic nature of the blend films compared with those of pure chitosan. The authors confirmed that the plant-extract-doped polymer material can be a novel antimicrobial agent for food-packaging application. Addition of BE at a higher weight percentage is a major limitation that has a major influence on the properties of the blend films.

中文翻译：

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槟榔叶提取物掺杂多糖共混薄膜的制备、表征及抗菌活性

将槟榔叶提取物 (BE) 掺入壳聚糖和壳聚糖/香草醛 (CH/Vn) 混合薄膜中，以提高壳聚糖薄膜的机械、热和抗菌性能。分析了形态、结晶度和玻璃化转变温度 ( T _g ) 对壳聚糖/槟榔叶提取物 (CH/BE) 和壳聚糖/香兰素/槟榔叶提取物 (CH/Vn/BE) 薄膜力学性能的影响。的光滑均匀的形态，结晶度和的移位降低Ť _克更高的值导致改善的机械性能。扫描电子显微镜、原子力显微镜、X 射线衍射、差示扫描量热法、热重分析和傅立叶变换红外研究表明，将 BE 包含到 CH/Vn 中可增强物理化学性质。抗菌活性、氧气渗透率和接触角测量结果证实，与纯壳聚糖相比，共混膜的活性和亲水性显着提高。作者证实，植物提取物掺杂的聚合物材料可以成为食品包装应用的新型抗菌剂。以更高的重量百分比添加 BE 是一个主要限制，它对共混膜的性能有重大影响。