CIDCA (Centro de Investigación y Desarrollo en Criotecnología de Alimentos), Facultad de Ciencias Exactas-Universidad Nacional de La Plata -CCT-La Plata- CONICET- CICPBA- 47 y 116 S/N, La Plata (B1900AJJ), Buenos Aires, Argentina.
CIOp (Centro de Investigaciones Ópticas), CONICET La Plata - CICPBA - UNLP, CC 3, (1897) Gonnet, La Plata, Argentina.
Carbohydr Polym. 2021 Jan 15;252:117208. doi: 10.1016/j.carbpol.2020.117208. Epub 2020 Oct 10.
Silver nanoparticles (AgNP L) synthesis using the active compounds of lemon juice was optimized. The obtained nanoparticles were included in starch-based film formulations, studying the relevant properties that condition their application in the packaging area. The optimized conditions for AgNP L' synthesis were 30 min at 90 °C, which led to the lowest nanoparticle size (5.5 nm) with the highest associated stability (ζ= -29.5 mV) up to 90 days. Nanocomposite films resulted with an orange tone that increased with AgNP L concentration (14.3-143 ppm). Water vapor permeability decreased while tensile mechanical resistance increased up to an aggregate of 71.5 ppm of AgNP L, indicating the nanoparticles' reinforcement of the polymer matrix. Besides, the citric acid content provided by lemon juice also affected the starch-based relevant film properties. Regarding antimicrobial capacity, a synergic effect between active compounds of lemon juice and silver nanoparticles was evidenced, being Salmonella spp. the most sensitive bacteria.
采用柠檬汁中的活性化合物优化了银纳米粒子（AgNP L）的合成。将得到的纳米粒子包含在基于淀粉的薄膜配方中，研究了影响其在包装领域应用的相关性质。AgNP L'合成的最佳条件为 90°C 下 30 分钟，这导致纳米粒子尺寸最小（5.5nm），稳定性最高（ζ=-29.5mV），可稳定 90 天。纳米复合材料薄膜呈现橙色色调，随着 AgNP L 浓度（14.3-143ppm）的增加而增加。水蒸气透过率降低，拉伸力学阻力增加，最高可达 71.5ppm 的 AgNP L，表明纳米粒子增强了聚合物基质。此外，柠檬汁中的柠檬酸含量也影响了基于淀粉的相关薄膜性能。关于抗菌能力，证明了柠檬汁中的活性化合物和银纳米粒子之间存在协同作用，其中最敏感的细菌是沙门氏菌。
