Institute of Materials Technology, Polymer Division, Poznan University of Technology, Piotrowo 3, 61-138 Poznan, Poland.
National Research Council (CNR), Institute of Polymers, Composites and Biomaterials (IPCB), c/o Comprensorio Olivetti, via Campi Flegrei, 34, 80078 Pozzuoli, NA, Italy.
Molecules. 2023 Jan 26;28(3):1220. doi: 10.3390/molecules28031220.
Composites made of linear low-density polyethylene (LLDPE) and β-cyclodextrin/d-limonene inclusion complex (CD-lim) were prepared by melt extrusion to develop a novel food packaging material. Scanning electron microscopy evidenced a fairly good dispersion of the filler within the polymeric matrix. Infrared spectroscopy coupled with thermogravimetric analysis confirmed the presence of CD-lim in the composites, proving that the applied technology of including the essential oil within β-CD cages allows for preventing a sizable loss of d-limonene despite a high temperature and shear applied upon extrusion processing. Moreover, the influence of the filler on the thermal properties of PE was assessed. It was found that the cyclodextrin-based inclusion complex significantly fastens the crystallization path of the polyethylene matrix with an improved crystallization rate of the PE/CD-lim composites compared to the neat polymer.
采用熔融挤出法制备了线性低密度聚乙烯（LLDPE）和β-环糊精/苧烯包合物（CD-lim）的复合材料，以开发新型食品包装材料。扫描电子显微镜证明了填充剂在聚合物基体中的相当良好的分散性。红外光谱结合热重分析证实了复合材料中存在 CD-lim，证明了在高温和剪切作用下将精油包合在β-CD 笼内的应用技术可以防止苧烯大量损失。此外，还评估了填充剂对 PE 热性能的影响。结果发现，与纯聚合物相比，基于环糊精的包络复合物显著加快了聚乙烯基体的结晶路径，提高了 PE/CD-lim 复合材料的结晶速率。
