To expand the application of fumed silica in highly polar systems, organic silicon-based modifiers are often used to impart hydrophobicity to its surface. Polydimethylsiloxane (PDMS), commonly known as silicone oil, is a linear organosilicon polymer characterized by excellent thermal stability, low surface energy, and good compatibility, making it an ideal hydrophobic modifier. During the modification process, PDMS interacts with the silanol groups on the surface of hydrophilic fumed silica through physical coating or chemical reactions...