Aerogel composite and preparation method thereof

Patent metadata

Field	Value
Publication number	US-10144676-B2
Application number	US-201715601118-A
Country	US
Kind code	B2
Filing date	May 22, 2017
Priority date	Oct 19, 2016
Publication date	Dec 4, 2018
Grant date	Dec 4, 2018

Abstract

The present invention relates to an aerogel composite and a preparation method thereof. The preparation method of the aerogel composite of the present invention comprises the following steps; preparing a hydrophobic gel (step 1); dispersing fiber in a solvent to prepare a solution (step 2); adding the hydrophobic gel above in the solution of step 2 and stirring the mixture to prepare a fiber and hydrophobic gel mixed solution (step 3); separating floc from the mixed solution of step 3 (step 4); and drying the floc (step 5). According to the preparation method of the aerogel composite of the present invention, a high performance aerogel composite having various shapes can be prepared.

First claim

What is claimed is:

1. A preparation method of an aerogel composite comprising the following steps:
preparing a hydrophobic gel;
dispersing fiber in a solvent to prepare a solution;
adding the hydrophobic gel above in the solution of dispersing step;
stirring the mixture to prepare a fiber and hydrophobic gel mixed solution;
separating floc from the mixed solution of the stirring; and
drying the floc.

2. The preparation method of an aerogel composite according to claim 1 , wherein the preparing step is composed of the following sub-steps:
preparing a wet-gel; and
making the wet-gel into a hydrophobic gel.

3. The preparation method of an aerogel composite according to claim 1 , wherein the solvent of the dispersing step is selected from the group consisting of isopropylalcohol, ethanol, methanol, butanol, acetone, n-hexane, n-heptane, xylene, cyclohexane, and a mixture thereof.

4. The preparation method of an aerogel composite according to claim 1 , wherein the fiber is a non-woven fiber having a diameter of 1˜1,000 μm and a length of 1˜300 mm.

5. The preparation method of an aerogel composite according to claim 1 , wherein the adding step includes an additional step of adding a binder or a coagulant.

6. The preparation method of an aerogel composite according to claim 1 , wherein the separating step includes an additional step of eliminating a solvent from the mixed solution by pouring the solution in a magnetic filter or mold.

7. The preparation method of an aerogel composite according to claim 1 , wherein the method includes an additional step of pressing the floc separated from the mixed solution and molding thereof.

8. The preparation method of an aerogel composite according to claim 1 , wherein the drying process in the drying step is performed under normal pressure.

9. The preparation method of an aerogel composite according to claim 1 , wherein the drying process in the drying step is performed under vacuum condition.

10. The preparation method of an aerogel composite according to claim 1 , wherein the solution of the dispersing step includes a dispersing agent.

Assignees

• Korea Inst Energy Res
• Daehyup Tech Co Ltd

Inventors

• Ahn Young-Soo
• Lee Jin-Seok
• Hong Chang Guk
• Lee Sang Eun
• Song Bong Kwan

Classifications

• C04B38/04 Primary

  by dissolving-out added substances · CPC title

• C01B33/155

  Preparation of hydroorganogels or organogels · CPC title

• C01B33/145 Primary

  Preparation of hydroorganosols, organosols or dispersions in an organic medium · CPC title

• C04B14/064

  Silica aerogel · CPC title

• C04B38/0045

  by a process involving the formation of a sol or a gel, e.g. sol-gel or precipitation processes · CPC title