Kurabetta Lingaraj Kariyappa, Masti Saraswati P, Eelager Manjunath P, Gunaki Manjushree Nagaraj, Madihalli Suhasini, Hunashyal Ajitkumar Appayya, Chougale Ravindra B, Kumar S K Praveen, Kadapure Arihant Jayawant
Department of Chemistry, Karnatak Science College, Dharwad 580 001, India.
Department of Chemistry, Karnatak Science College, Dharwad 580 001, India.
Int J Biol Macromol. 2023 Dec 31;253(Pt 7):127552. doi: 10.1016/j.ijbiomac.2023.127552. Epub 2023 Oct 19.
In the present study, cationic starch (CS)/chitosan (CH) incorporated with tannic acid (TA)(CSCT) eco-friendly films were prepared by employing an inexpensive solvent casting technique. Influence of TA on the physicochemical and antimicrobial properties of CS/CH polymer matrix were studied. The FTIR findings and homogeneous, dense SEM micrographs confirms the effective interaction of TA with CS/CH polymer matrix. CSCT-3 active film displayed tensile strength of 26.99±1.91 MPa, which is more substantial than commercially available polyethylene (PE) (12-16 MPa) films. The active films exhibited excellent barrier properties against moisture and water, supported by increased water contact angle values (86.97±0.29°). Overall migration rate of active films was found to be below the permitted limit of 10mg/dm. The active films showed around 56% of degradation in soil within 15 days. Besides, the active films showed concurring impact against food borne pathogens like E. coli, S. aureus and C. albicans. The CSCT-3 active film presented 90.83% of antioxidant capacity, demonstrating the effective prevention of food oxidation related deterioration. Ladyfinger packaging was inspected to examine the ability of active films as packaging material resulted in effectively resisting deterioration and extending shelf life in comparison with traditional PE packaging.
在本研究中，采用廉价的溶剂浇铸技术制备了含有单宁酸（TA）的阳离子淀粉（CS）/壳聚糖（CH）（CSCT）环保薄膜。研究了TA对CS/CH聚合物基体的物理化学和抗菌性能的影响。傅里叶变换红外光谱（FTIR）结果以及均匀、致密的扫描电子显微镜（SEM）显微照片证实了TA与CS/CH聚合物基体之间的有效相互作用。CSCT-3活性薄膜的拉伸强度为26.99±1.91兆帕，比市售聚乙烯（PE）薄膜（12 - 16兆帕）更显著。活性薄膜对水分和水表现出优异的阻隔性能，水接触角值增加（86.97±0.29°）证明了这一点。活性薄膜的总体迁移率被发现低于10毫克/平方分米的允许限值。活性薄膜在15天内在土壤中显示出约56%的降解率。此外，活性薄膜对大肠杆菌、金黄色葡萄球菌和白色念珠菌等食源性病原体表现出协同抑制作用。CSCT-3活性薄膜的抗氧化能力为90.83%，表明其能有效防止与食品氧化相关的变质。对秋葵包装进行了检测，以检验活性薄膜作为包装材料的能力，结果表明与传统PE包装相比，它能有效抵抗变质并延长保质期。
