Szmechtyk Tomasz
Department of Physical Chemistry, Faculty of Chemistry, University of Łódź, Pomorska 163/165, 90-236 Łódź, Poland.
Molecules. 2024 Dec 27;30(1):65. doi: 10.3390/molecules30010065.
Extracts from natural waste like bark or leaves are great sources of phytochemicals, which contain functional groups (hydroxyl, carboxylic, vinyl, allyl) attractive in terms of polymer synthesis. In this study, the synthesis of epoxy with an extract of Scots pine bark as a natural co-hardener was evaluated. Ultraviolet-visible (UV-Vis) spectroscopy was used for the identification of phytochemicals with conjugated dienes and quantification of TPC. Also, the total solid content (TSC) of representative extracts was calculated. The best extract in terms of total phenolic content (TPC) value was selected as a co-hardener and investigated using differential scanning calorimetry (DSC) for thermal effects and attenuated total reflectance Fourier transform infrared spectroscopy (ATR FTIR) for reactions between functional groups. Also, the mechanical properties (flexural modulus, flexural strength, impact strength, Shore D hardness) and density of composition were obtained for extract-based epoxy and compared to reference sample values. Results were discussed in terms of future research and improvement of compositions. Also, potential applications were proposed.
从树皮或树叶等天然废弃物中提取的物质是植物化学物质的重要来源，这些植物化学物质含有在聚合物合成方面具有吸引力的官能团（羟基、羧基、乙烯基、烯丙基）。在本研究中，评估了以苏格兰松树皮提取物作为天然共固化剂合成环氧树脂的情况。利用紫外可见（UV-Vis）光谱法鉴定具有共轭二烯的植物化学物质并定量总酚含量（TPC）。此外，还计算了代表性提取物的总固体含量（TSC）。选择总酚含量（TPC）值最佳的提取物作为共固化剂，并使用差示扫描量热法（DSC）研究热效应，使用衰减全反射傅里叶变换红外光谱法（ATR FTIR）研究官能团之间的反应。此外，还获得了基于提取物的环氧树脂的机械性能（弯曲模量、弯曲强度、冲击强度、邵氏D硬度）和密度，并与参考样品值进行了比较。从未来的研究和组合物的改进方面对结果进行了讨论。此外，还提出了潜在的应用。
