Centre of Polymer Systems, University Institute, Tomas Bata University in Zlín, Tr. T. Bati 5678, 76001 Zlín, Czech Republic.
Molecules. 2021 Aug 27;26(17):5190. doi: 10.3390/molecules26175190.
This study investigated the effect of natural antioxidants inherent to beetroot ( var. ) on the ageing of environmentally friendly plastics. Certain properties were examined in this context, comprising thermal, mechanical, and morphological properties. A visual evaluation of relevant changes in the given polymers (polylactide and polycaprolactone) was conducted during an ageing test in a UV chamber (45 °C, 70% humidity) for 720 h. The films were prepared by a casting process, in which samples with the extract of beetroot were additionally incorporated in a common filler (bentonite), this serving as a carrier for the extract. The results showed the effect of the incorporated antioxidant, which was added to stabilize the biodegradable films. Its efficiency during the ageing test in the polymers tended to exceed or be comparable to that of the reference sample.
本研究探讨了甜菜根（品种）中固有的天然抗氧化剂对环保塑料老化的影响。在这方面检查了某些性质，包括热、机械和形态性质。在 UV 室（45°C，70%湿度）中进行的老化测试期间，对相关聚合物（聚乳酸和聚己内酯）的变化进行了目视评估 720 小时。通过浇铸工艺制备薄膜，其中在普通填料（膨润土）中还加入了甜菜根提取物的样品，该填料作为提取物的载体。结果表明了所加入的抗氧化剂的效果，该抗氧化剂被添加以稳定可生物降解的薄膜。其在聚合物老化测试中的效率趋于超过或与参考样品相当。
