METHOD OF PREPARING HYDROPHOBIC SILICA AEROGEL AND HYDROPHOBIC SILICA AEROGEL PREPARED THEREBY

    公开(公告)号:US20180002181A1

    公开(公告)日:2018-01-04

    申请号:US15537205

    申请日:2016-11-04

    Applicant: LG CHEM, LTD.

    CPC classification number: C01B33/154 C01B33/158 C08K3/36

    Abstract: The present invention relates to a method of preparing a high hydrophobic silica aerogel having a high specific surface area and a low tap density, and a hydrophobic silica aerogel prepared thereby. The method of preparing a hydrophobic silica aerogel according to the present invention may have good productivity and economic efficiency, because preparation time is reduced by simultaneously performing surface modification, gelation, and solvent substitution in a single step, and may control a degree of hydrophobicity of the prepared silica aerogel by controlling a surface modification reaction by including a step of adding ammonium hydroxide. Thus, the preparation method according to the present invention and the hydrophobic silica aerogel are suitable for industries that need the method and the hydrophobic silica aerogel, particularly, industries that need a silica aerogel having high hydrophobicity or industries that need a silica aerogel having various degrees of hydrophobicity.

    METHOD FOR PRODUCING SILICA AEROGEL AND SILICA AEROGEL PRODUCED THEREBY

    公开(公告)号:US20190194027A1

    公开(公告)日:2019-06-27

    申请号:US16069677

    申请日:2017-09-12

    Applicant: LG Chem, Ltd.

    Abstract: The present invention relates to a method for producing a silica aerogel and a silica aerogel produced thereby. The present invention provides a two-step process of a nucleation step of forming silica colloid particles by using a low-concentration silica precursor and a growth step of further adding a relatively high-concentration silica precursor to form a silica wet gel by using the silica colloid particles as a seed. Thus, the present invention provides a method for producing a silica aerogel of which mechanical stability is improved to enhance pore characteristics, and physical properties are readily controllable, and also provides a silica aerogel produced thereby.

    METHOD FOR PRODUCING SILICA AEROGEL AND SILICA AEROGEL PRODUCED THEREBY

    公开(公告)号:US20190062169A1

    公开(公告)日:2019-02-28

    申请号:US15768999

    申请日:2017-09-06

    Applicant: LG CHEM, LTD.

    Abstract: The present invention relates to a method for producing a silica aerogel and a silica aerogel produced thereby. More specifically, a first water glass solution is used to form a first silica wet gel, and then a second water glass solution is additionally added to form a second silica wet gel organically bonded to the first silica wet gel which serves as a basic skeleton, so that a silica aerogel with enhanced physical properties is formed to increase the resistance to shrinkage in ambient drying, and the concentration of silicon dioxide in each of the first and second water glass solutions is controlled, thereby providing a method for producing a silica aerogel by which a silica aerogel having a specific tap density and controllable density can be produced, and also providing a silicon aerogel produced by the method.

Patent Agency Ranking