Method for preparing rod-like silica fine particles including carbon

Patent metadata

Field	Value
Publication number	US-9302916-B2
Application number	US-201313873595-A
Country	US
Kind code	B2
Filing date	Apr 30, 2013
Priority date	Dec 27, 2012
Publication date	Apr 5, 2016
Grant date	Apr 5, 2016

Abstract

Disclosed is a method for preparing rod-like silica fine particles including carbon, the method including: a first step of preparing a mixed solvent by mixing a surfactant with alcohol, and then preparing a mixed solution by adding water, ethanol, ammonia water and a salt to the mixed solvent; a second step of forming rod-like silica fine particles by adding a silica precursor to the mixed solution; and a third step of carbonizing the rod-like silica fine particles, and through a sol-gel reaction of the silica precursor and a carbonization process thereof.

First claim

What is claimed is:

1. A method for preparing rod silica fine particles including carbon, comprising:
a first step of preparing a mixed solvent by mixing a surfactant with alcohol, and then preparing a mixed solution by adding water, ethanol, ammonia water and a salt to the mixed solvent;
a second step of forming rod silica fine particles by adding a silica precursor to the mixed solution; and
a third step of carbonizing the rod silica fine particles.

2. The method of claim 1 , wherein the surfactant is polyvinylpyrrolidone.

3. The method of claim 2 , wherein the polyvinylpyrrolidone is added in an amount of about 1 to 20% by weight based on a total weight of the mixed solution.

4. The method of claim 1 , wherein the alcohol comprises one or more selected from the group consisting of propanol, butanol, pentanol, and isomers thereof.

5. The method of claim 1 , wherein the salt is sodium citrate.

6. The method of claim 1 , wherein the second step further comprises controlling an aspect ratio of the formed rod-like silica fine particles.

7. The method of claim 1 , wherein the silica precursor is tetraethyl orthosilicate (TEOS).

Assignees

• Hyundai Motor Co Ltd

Inventors

• Kim Sang-Young
• Kim Se-Jung
• Yi Gi-Ra
• Kim Seung-Hyun

Classifications

• C01B33/18 Primary

  Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof (preparation of aerogels by dehydrating gels C01B33/158; treatment to enhance the pigmenting or filling properties C09C) · CPC title

• C01P2004/10

  extending in one dimension, e.g. needle-like · CPC title

• C03C17/02

  with glass (C03C17/34, C03C17/44 take precedence) · CPC title

• C03C4/00

  Compositions for glass with special properties · CPC title