Moraczewski Krzysztof, Stepczyńska Magdalena, Malinowski Rafał, Karasiewicz Tomasz, Jagodziński Bartłomiej, Rytlewski Piotr
Faculty of Materials Engineering, Kazimierz Wielki University, Chodkiewicza 30, 85-064 Bydgoszcz, Poland.
Łukasiewicz Research Network-Institute for Engineering of Polymer Materials and Dyes, Marii Skłodowskiej-Curie 55, 87-100 Toruń, Poland.
Materials (Basel). 2023 Jul 21;16(14):5154. doi: 10.3390/ma16145154.
Natural extracts of plant origin are used as anti-aging compounds of biodegradable polymers. Coffee, cocoa, or cinnamon extracts in amounts from 0.5 to 10 wt.% were added to the polycaprolactone matrix. The manufactured materials were aged at elevated temperatures with increased relative humidity and continuous exposure to UV radiation for 720, 1440, or 2160 h. The performance of the proposed extracts was compared with the retail anti-aging compound, butylated hydroxytoluene. Visual assessment, FTIR analysis, melt flow rate, tensile strength, impact tensile strength, thermogravimetry, and differential scanning calorimetry tests were conducted. Results showed that the use of lower contents of the tested extracts is particularly advantageous. When the content of the extract did not exceed 1 wt.%, no unfavorable influence on the properties of the materials was observed. The stabilizing performance during accelerated aging was mostly similar to or greater than that of the reference compound used.
植物源天然提取物被用作可生物降解聚合物的抗老化化合物。将含量为0.5至10 wt.%的咖啡、可可或肉桂提取物添加到聚己内酯基质中。将制成的材料在高温、相对湿度增加且持续暴露于紫外线辐射的条件下老化720、1440或2160小时。将所提出的提取物的性能与市售抗老化化合物丁基化羟基甲苯进行了比较。进行了视觉评估、傅里叶变换红外光谱分析、熔体流动速率、拉伸强度、冲击拉伸强度、热重分析和差示扫描量热法测试。结果表明，使用较低含量的测试提取物特别有利。当提取物的含量不超过1 wt.%时，未观察到对材料性能的不利影响。加速老化过程中的稳定性能大多与所使用的参考化合物相似或优于该参考化合物。
