Sukhanova Anna, Boyandin Anatoly, Ertiletskaya Natalya, Shalygina Taisia, Shabanov Alexander, Vasiliev Alexander, Obvertkin Ivan, Brott Valeria, Prokopchuk Yulia, Samoilo Alexander
Department of Biodegradable Polymers Materials, Reshetnev Siberian State University of Science and Technology, 31 Krasnoyarskiy Rabochiy Av., Krasnoyarsk 660037, Russia.
Department of Analysis, Synthesis, Modeling and Digital Design of Smart Materials with Specified Properties, Reshetnev Siberian State University of Science and Technology, 31 Krasnoyarskiy Rabochiy Av., Krasnoyarsk 660037, Russia.
Polymers (Basel). 2023 Oct 16;15(20):4099. doi: 10.3390/polym15204099.
Eco-friendly polymer composites in the form of granules based on biodegradable polycaprolactone (PCL) with the inclusion of montmorillonite (MMT) from 5 to 50 wt% were prepared by solution-casting and melt extrusion. The physicochemical properties of the composite granules were studied using FTIR spectroscopy, XRDA, DSC, and TGA methods. The paper presents comparative values of crystallinity of composite granules which depend on the method of measuring (XRDA, DSC). It was shown that the crystallinity of PCL/MMT granules was affected by the preparation method and by the MMT content, and that with increase in MMT content, crystallinity increased by up to 61-67%. The change in crystallinity of the granules also affected its biodegradation in soil. At the end of exposure in soil, the mass loss for the granules prepared by solution-casting was more than 90%, whereas for the composite granules prepared by extrusion it was less than 60%. Applying melt extrusion enabled obtaining intercalated composites with predictable features, whereas only mixed-structure microcomposites could be prepared by solution-casting.
通过溶液浇铸和熔融挤出制备了基于可生物降解聚己内酯（PCL）并包含5至50重量%蒙脱石（MMT）的颗粒状环保聚合物复合材料。使用傅里叶变换红外光谱（FTIR）、X射线衍射分析（XRDA）、差示扫描量热法（DSC）和热重分析法（TGA）研究了复合颗粒的物理化学性质。本文给出了取决于测量方法（XRDA、DSC）的复合颗粒结晶度的比较值。结果表明，PCL/MMT颗粒的结晶度受制备方法和MMT含量的影响，并且随着MMT含量的增加，结晶度提高了61%至67%。颗粒结晶度的变化也影响其在土壤中的生物降解。在土壤中暴露结束时，通过溶液浇铸制备的颗粒质量损失超过90%，而通过挤出制备的复合颗粒质量损失小于60%。采用熔融挤出能够获得具有可预测特性的插层复合材料，而通过溶液浇铸只能制备混合结构的微复合材料。
