Method and apparatus for manufacturing aerogel sheet

A method for manufacturing an aerogel sheet, the method comprising:

• a step (a) of preparing a blanket having a plate shape;
• a step (b) of mixing a silica sol with a gelling catalyst to prepare a silica sol precursor;
• a step (c) of injecting the silica sol precursor prepared in the step (b) to a surface of the blanket prepared in the step (a) through an injection device to gelate the silica sol precursor,
• wherein, in the step (c), the injection device injects the silica sol precursor while moving from a first side to an opposite second side in a width direction or a length direction of the surface of the blanket to uniformly inject the silica sol precursor to the surface of the blanket, and the injection device comprises a scraper for uniformly adjusting a thickness of the silica sol precursor injected to the surface of the blanket;
• a step (d) of aging the blanket in which the silica sol precursor is gelated;
• a step (e) of injecting a coating solution to the aged blanket to modify a surface of the blanket;
• and
• a step (f) of drying the blanket of which the surface is modified to yield the aerogel sheet.