Flavonoids as Natural Stabilizers and Color Indicators of Ageing for Polymeric Materials
Flavonoids as Natural Stabilizers and Color Indicators of Ageing for Polymeric Materials
复制标题
DOI：
10.3390/polym7061125
复制
发表时间：
2015-06-01
期刊：
影响因子：
5
通讯作者：
Masek, Anna
中科院分区：
文献类型：
--
作者：
Masek, Anna
近年来，各种稳定剂的使用几乎没有变化。在目前的文献中，磷酸酯衍生物被用作聚合物中的抗老化添加剂，其中最流行的是空间位阻环胺。然而，这些化合物中的大多数是致癌的。合成酚已越来越多地用作食品和聚合物中的抗氧化剂。生态标准鼓励消除与食品或人体接触的聚合物产品中的有害添加剂。本文介绍了类黄酮（水飞蓟素/黄酮配体）用于聚合物稳定和使用天然植物化合物，如聚合物老化时间的颜色指示剂的应用。在本研究中，我提出了两种应用方法：传统的，在加工过程中，和新的一个，通过使用浸渍法。通过热重分析（TG）、差示扫描量热法（OIT）、分光光度法（CIE-Lab）等方法测定了黄酮类化合物的氧化诱导时间（OIT），并对其抗氧化活性进行了研究。它们提供聚合物材料的着色，该着色作为老化时间的函数而周期性地改变。此外，在聚合物中使用植物化合物提供了与合成抗氧化剂类似的稳定效果。
Few changes have occurred in the use of various stabilizers over recent years. In the current literature, phosphate derivatives are used as anti-ageing additives in polymers, and the most popular of these are sterically hindering cyclic amines. However, most of these compounds are carcinogenic. Synthetic phenols have been increasingly used as antioxidants in food and in polymers. Ecological standards encourage the elimination of harmful additives in polymeric products that come in contact with food or with the human body. This article presents application of flavonoid (silymarin/flavonoligand) for polymer stabilization and use of natural phytocompounds such as color indicators of polymers ageing time. In this research, I propose two ways of application: traditional, during processing; and the new one, by using impregnation method. Based on the change of deformation energy (ageing coefficient K), FTIR, oxidative induction time (OIT) evaluated by differential scanning calorimetry (OIT), thermogravimetry analysis (TG), spectrophotometric color measurements in terms of CIE-Lab color space values, I confirmed the high antioxidant activity of flavonoids in EPM. They provide coloration of the polymeric materials that changes cyclically as a function of aging time. Additionally, the use of phytocompounds in polymers provides similar stabilizing effect to those of synthetic antioxidants.