Nanocomposite films based on PLA with 1.0 % w/w silica nanoparticles (NP) and surface-functionalized silica nanoparticles with lactic acid (NP-LA), respectively, were obtained by extrusion process. Subsequently, cinnamaldehyde (ci) was incorporated through supercritical impregnation in the films at a pressure of 12 MPa, 40 °C temperature and 1.0 MPa min⁻¹ depressurization rate. The developed materials were characterized on their thermal-mechanical, structural and barrier properties. Simultaneously, a phenomenological mass transfer was used to describe the release of cinnamaldehyde from the bionanocomposite in an aqueous food simulant (ethanol 10 % v/v solution). A 44 % decrease in oxygen permeability concerning the material without nanoparticles was checked as well as the plasticizing effect of cinnamaldehyde. Regarding the release of the active compound, the incorporation of functionalized nanoparticles NP-LA decreased the diffusion coefficient from 3.5·10⁻¹⁴ to 0.9·10⁻¹⁴ (m²/s), obtaining the filling effect of the silica nanoparticles, delaying the active compound release.

通过挤出工艺分别获得了基于PLA的纳米复合膜，其中含1.0％w / w的二氧化硅纳米颗粒（NP）和具有乳酸的表面功能化二氧化硅纳米颗粒（NP-LA）。随后，在12 MPa，40°C温度和1.0 MPa min ^-1的压力下，通过超临界浸渍将肉桂醛（ci）引入薄膜中。降压率。所开发的材料具有热机械，结构和阻隔性能。同时，现象学传质被用来描述在食品模拟水溶液（乙醇10％v / v溶液）中从生物纳米复合物中释放肉桂醛的现象。检查了没有纳米颗粒的材料的透氧性降低了44％，以及肉桂醛的增塑效果。关于活性化合物的释放，官能化纳米粒子NP-LA的引入将扩散系数从3.5·10 ^-14降低到0.9·10 ^-14（m ² / s），获得了二氧化硅纳米粒子的填充效果，延迟了活性化合物释放。