Method of preparing regular-shaped SiO2 aerogel granules through mechanical cutting

The invention relates to nano inorganic non-metal materials and particularly relates to a method of preparing regular-shaped SiO2 aerogel granules through mechanical cutting, which comprises the following steps: 1) dissolving organic silane, diluted hydrochloric acid and deionized water in an organic solvent at 0-40 DEG C, wherein the volume ratio of the organic silane, the diluted hydrochloric acid, the deionized water to the organic solvent is 1:0.0025-0.5:0.05-5:0.5-8, mixing the solution uniformly, and carrying out a reaction at 45-55 DEG C for 5-70 h to obtain silica sol; 2) at 0-40 DEG C, adding the organic solvent with mixing and stirring, adding alkali to carry out a reaction for 0.01-1 h, and allowing the substances to stand; (3) after gelation, cutting gel to obtain the regular-shaped gel granules through the mechanical cutting; and (4) drying the gel granules. In the invention, through the high-energy cutting, the regular-shaped SiO2 aerogel granules are prepared. The regular-shaped SiO2 aerogel granule is uniform in texture, is high in visible light transmittance, is good in filling property, is convenient to process subsequently and promotes industrialization of SiO2 aerogel greatly.