| abstract |
A surface capable of preventing binder components such as dispersants and resins from entering into open pores and maintaining the characteristics of porous oxide particles such as low refractive index and low dielectric property. Provided are a coated porous oxide particle and a surface coating method of the porous oxide particle. The surface-coated porous oxide particles of the present invention form a reaction point 5 on the outer peripheral surface 2 of a porous oxide particle 1 made of silicon oxide or the like, and the reaction point 5 is coated with an organic polymer. The layer 6 is bonded and fixed, and the opening end of the open hole 3 is sealed by the coating layer 6, the inside of the open hole 3 is made hydrophilic, and the thickness of the coating layer 6 is 0.1 nm or more and 30 nm or less. It was. [Selection] Figure 1 |