The preparation process also plays an important role in the preparation of titanium dioxide gel microspheres. Firstly, the effect of adding method of oil phase solution on the obtained powder was investigated. FIG. 111 is the SEM photo of titanium dioxide gel particles obtained by slowly dropping the refueling phase solution into the aqueous phase solution. It can be seen from the figure that the obtained powder is basically the aggregate of spherical particles. In the preparation process of general polymer emulsion, it is often preemulsified and then added initiator to initiate polymerization to form polymer emulsion. In the reaction system for preparing titania gel microspheres, emulsification and sol-gel reaction are actually simultaneous. If the oil phase solution is slowly dropped, the oil phase solution added first solidifies to form gel microspheres after emulsification and sol-gel reaction, and the oil phase solution added later maintains liquid fluidity after emulsification. In the process of high-speed stirring, the dispersed phase constantly collides, and the liquid oil phase droplets often cannot be separated by high-speed shear after colliding with the solid gel microspheres, because the liquid oil phase solution will infiltrate the solid gel microspheres and cause fusion or the liquid oil phase droplets will capture the solid gel microspheres. The dispersed phase particles produced by the fusion actually maintain a certain fluidity, thus trapping new gel microspheres in subsequent collisions until the system's fluidity is completely lost. Therefore, the powder prepared by slowly dropping the oiling phase solution has the agglomeration structure of spherical particles.
