Hou Tianyu, Venkatesan Raja, Dhilipkumar Thulasidhas, Mayakrishnan Vishnuvarthanan, Raorane Chaitany Jayprakash, Sana Siva Sankar, Ansari Mushtaq Ahmad, Kim Seong-Cheol
School of Chemistry and Chemical Engineering, North University of China, Taiyuan 030051, China.
School of Chemical Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan 38541, Republic of Korea; Department of Biomaterials, Saveetha Dental College and Hospitals, SIMATS, Saveetha University, Chennai 600077, Tamil Nadu, India.
Int J Biol Macromol. 2025 Jan;285:138276. doi: 10.1016/j.ijbiomac.2024.138276. Epub 2024 Dec 2.
The aim of this work was to study the characteristics of composites fabricated from cellulose (CL) and chitosan (CS) blends that were reinforced with different tannic acid (TA) and gallic acid (GA) concentrations. The structure and antibacterial activity of CL/CS composite films were investigated with the addition of TA and GA. The composite films were subjected to mechanical, water contact angle (WCA), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), Scanning electron microscopy (SEM), and antibacterial activity tests. The FTIR results and the uniform dense SEM images confirmed the interaction of TA and GA with the CL/CS blends. The water vapor transmission rate (WVTR) of films with 5 wt% TA and GA improved by 23.02 %. The tensile strength of the CCTA-3 film was 27.67 MPa, demonstrating higher tensile properties compared to films made from CL and CS blend film (13.20 MPa). The prepared films also showed increased resistance to moisture and water, as indicated by their higher water contact angle (WCA) values (59.43°). The antibacterial activity of the films was effective against food-borne bacteria such as S. aureus and E. coli due to the addition of TA and GA. The shelf-life of cherry tomatoes increased by approximately 15 days when covered in CCTA-3 instead of polyethylene film. Based on the results, CL/CS blend films containing TA could be beneficial for use in active food packaging.
这项工作的目的是研究由纤维素（CL）和壳聚糖（CS）共混物制成的复合材料的特性，这些复合材料用不同浓度的单宁酸（TA）和没食子酸（GA）进行了增强。通过添加TA和GA来研究CL/CS复合膜的结构和抗菌活性。对复合膜进行了机械性能、水接触角（WCA）、傅里叶变换红外光谱（FTIR）、X射线衍射（XRD）、扫描电子显微镜（SEM）和抗菌活性测试。FTIR结果和均匀致密的SEM图像证实了TA和GA与CL/CS共混物之间的相互作用。含5 wt%TA和GA的薄膜的水蒸气透过率（WVTR）提高了23.02%。CCTA - 3薄膜的拉伸强度为27.67MPa，与由CL和CS共混膜制成的薄膜（13.20MPa）相比，显示出更高的拉伸性能。制备的薄膜还表现出对水分和水的抵抗力增强，这体现在它们更高的水接触角（WCA）值（59.43°）上。由于添加了TA和GA，薄膜的抗菌活性对诸如金黄色葡萄球菌和大肠杆菌等食源细菌有效。当用CCTA - 3覆盖而不是用聚乙烯薄膜覆盖时，樱桃番茄的保质期延长了约15天。基于这些结果，含TA的CL/CS共混膜可用于活性食品包装。
