The structural features of epoxy-silica nanocomposites were studied using small-angle X-ray scattering and electron microscopy. It was shown that during the formation of sols of silica nanoparticles in the presence and absence of an epoxy oligomer in the system, their aggregation processes change significantly. Using fractal analysis, the type of fractal aggregates of each structural level is identified and their sizes are determined. It has been established that for systems formed in the presence of an epoxy oligomer, a predominantly two-level fractal organization is observed, at the first level of which mass-fractal aggregates with average sizes of 10-23 nm are formed, and at the second level, depending on the concentration of nanoparticles, they can form both mass and surface fractal aggregates with average sizes of 35-55 nm.

中文翻译：

---

环氧低聚物对聚合物基质中形成的二氧化硅纳米粒子的分级结构的影响

使用小角度 X 射线散射和电子显微镜研究了环氧-二氧化硅纳米复合材料的结构特征。结果表明，在系统中存在和不存在环氧低聚物的情况下，二氧化硅纳米粒子的溶胶形成过程中，它们的聚集过程发生了显着变化。使用分形分析，确定每个结构级别的分形聚集体的类型并确定它们的大小。已经确定，对于在环氧低聚物存在下形成的系统，观察到主要的两级分形组织，在第一级形成平均尺寸为 10-23 nm 的质量分形聚集体，在第二级，根据纳米粒子的浓度，它们可以形成平均尺寸为 35-55 nm 的质量和表面分形聚集体。