Korra Srinivasulu, Madhurya S, Kumar T Sandeep, Sainath Annadanam V Sesha, Keshava Murthy P S, Reddy Jeevan Prasad
Food Packaging Technology Department, CSIR-Central Food Technological Research Institute, Mysuru, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002, India; Resource Centre, CSIR-Central Food Technological Research Institute, Hyderabad, India.
Food Packaging Technology Department, CSIR-Central Food Technological Research Institute, Mysuru, India.
Int J Biol Macromol. 2025 Mar;297:139849. doi: 10.1016/j.ijbiomac.2025.139849. Epub 2025 Jan 14.
Multifunctional PLA films were fabricated through the solution casting method by incorporating cardanol oil (CA) and amine-functionalized graphene (AFG). The effect of the CA, and AFG on the structural, mechanical, thermal, thermo-mechanical and antioxidant properties of PLA films were investigated. FTIR analysis of PLA-CA films showed distinct peak positions at 1590 cm corresponding to the aromatic C=C aromatic bond of CA, showing that CA is compatible with the PLA. The XRD analysis reveals that CA reduced the intensity of the PLA peak at 16.8° and the AFG enhanced the sharp intensity of the same peak. The surface morphology of CA and AFG inclusion films showed the uniform dispersion of fillers into the PLA matrix. The tensile properties of CA inclusion film showed increased elongation by 153 %, and AFG enhanced the tensile strength by 35 % compared to neat PLA. The thermal properties, such as DSC and TGA curves, showed that the CA and AFG influenced the T and T values of the fabricated PLA films. The antioxidant activity of PLA films was significantly enhanced by 28 and 12 times for CA and AFG inclusion films, respectively and showed moderate antimicrobial activity against Salmonella typhi (MTCC-733) bacteria. The developed PLA active films enhanced the shelf-life of mangoes by 15 days.
通过溶液浇铸法，将腰果酚油（CA）和胺功能化石墨烯（AFG）加入其中，制备了多功能聚乳酸（PLA）薄膜。研究了CA和AFG对PLA薄膜的结构、机械、热、热机械和抗氧化性能的影响。对PLA-CA薄膜的傅里叶变换红外光谱（FTIR）分析显示，在1590 cm处有对应于CA的芳香族C=C芳香键的明显峰位，表明CA与PLA相容。X射线衍射（XRD）分析表明，CA降低了PLA在16.8°处峰的强度，而AFG增强了同一峰的尖锐强度。CA和AFG包埋薄膜的表面形态显示填料均匀分散在PLA基体中。与纯PLA相比，CA包埋薄膜的拉伸性能显示伸长率提高了153%，AFG使拉伸强度提高了35%。差示扫描量热法（DSC）和热重分析法（TGA）曲线等热性能表明，CA和AFG影响了所制备PLA薄膜的T和T值。PLA薄膜的抗氧化活性分别显著提高了28倍和12倍（CA和AFG包埋薄膜），并对伤寒沙门氏菌（MTCC-733）表现出中等抗菌活性。所制备的PLA活性薄膜使芒果的货架期延长了15天。
