公开(公告)号：AU2014298538A1

公开(公告)日：2016-02-25

申请号：AU2014298538

申请日：2014-07-28

Applicant: EMPA EIDGENOSSISCHE MATERIALPRUFUNGS UND FORSCHUNGSANSTALT

Inventor： KOEBEL MATTHIAS ,  ZHAO SHANYU ,  BRUNNER SAMUEL ,  SIMMEN CAROLINE

IPC: C01B33/145 ,  C01B33/155 ,  C01B33/158

Abstract: A process for the production of an aerogel material comprises the following steps: a) preparation of a silicon oxide sol in an alcoholic solvent mixture; b) triggering of the gelation of the sol by adding base, giving a gel, and optionally ageing of the gel; c) hydrophobicization of the optionally aged gel; d) removal of the solvent mixture by subcritical drying, during which the aerogel material is formed. The silicon oxide sol formed in step a) comprises at least one acid-catalytically activatable hydrophobicization agent, where the volume fraction of the hydrophobicization agent in the sol is 5 to 60%. The hydrophobicization in step c) is induced as a result of release or addition of at least one hydrophobicization catalyst acting in combination with the hydrophobicization agent.