在这项研究中,研究了碳酸盐湖沉积物（聚乳酸/碳酸盐湖沉积物-PLA/CLS）对聚乳酸基复合材料的力学和结构性能的影响。通过分布分析了源自3-8和8-12m的两个沉积物的粒径差异（动态光散射-DLS），相组成（X射线衍射-XRD），表面官能团的存在(傅里叶变换-红外-FT-IR),和热稳定性（热重分析-TGA）。还进行了复合裂缝的显微观察。通过剥离强度验证了在风化室中调节前后，沉淀物分数对复合材料机械性能的影响，抗弯强度,和冲击强度测试。进行熔体流动速率研究以评估沉积物对PLA/CLS复合材料的加工性能的影响。还研究了疏水-亲水特性，并通过光学和电子显微镜进行了断裂分析。向PLA中添加碳湖沉积物可以获得对环境因素(例如升高的温度或湿度)具有抗性的复合材料。此外，与未改性的PLA相比，PLA/CLS复合材料显示出更高的流速和更高的表面疏水性。
In this study, the influence of carbonate lake sediments (Polylactide/Carbonate Lake Sediments-PLA/CLS) on the mechanical and structural properties of polylactide matrix composites was investigated. Two fractions of sediments originating from 3-8 and 8-12 m were analysed for differences in particle size by distribution (Dynamic Light Scattering-DLS), phase composition (X-ray Diffraction-XRD), the presence of surface functional groups (Fourier Transform-Infrared-FT-IR), and thermal stability (Thermogravimetric Analysis-TGA). Microscopic observations of the composite fractures were also performed. The effect of the precipitate fraction on the mechanical properties of the composites before and after conditioning in the weathering chamber was verified through peel strength, flexural strength, and impact strength tests. A melt flow rate study was performed to evaluate the effect of sediment on the processing properties of the PLA/CLS composite. Hydrophobic-hydrophilic properties were also investigated, and fracture analysis was performed by optical and electron microscopy. The addition of carbon lake sediments to PLA allows for the obtention of composites resistant to environmental factors such as elevated temperature or humidity. Moreover, PLA/CLS composites show a higher flow rate and higher surface hydrophobicity in comparison with unmodified PLA.
