Current time in Korea 12:55 Apr 19 (Fri) Year 2024 KCS KCS Publications
KCS Publications
My Journal  Log In  Register
HOME > Search > Browsing(BKCS) > Archives

Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 32, Number 7
BKCSDE 32(7)
July 20, 2011 
 
Title
 Stability of PS Opals in Supercritical Carbon Dioxide and Synthesis of Silica Inverse Opals
Author
 Hye Min Yu, Ah Ram Kim, Jun Hyuk Moon, Jong Sung Lim*, Kyu Yong Choi
Keywords
 Supercritical carbon dioxide, Silica inverse opals, TEOS
Abstract
 Recently, the synthesis of ordered macroporous materials has received much attention due to its potential use as photonic band gap materials.1 In this study, we have used the three-dimensional (3D) latex array template impregnated with benzenesulfonic acid (BSA), which is capable of catalyzing the reaction using tetraethyl orthosilicate (TEOS) as a precursor and distilled water. The polystyrene (PS) templates were reacted with TEOS in scCO2 at 40 °C and at 80 bar. In the reactor, TEOS was filtrated into the PS particle lattice. After the reaction, porous silica materials were obtained by calcinations of the template. The stability test of the PS template in pure CO2 was conducted before the main experiment. Scanning electron microscopy (SEM) images showed that the reaction in scCO2 takes place only on the particle surface. This new method using scCO2 has advantages over conventional sol-gel processes in its capability to control the fluid properties such as viscosity and interfacial tension. It has been found that the reaction in scCO2 occurs only on the particle surface, making the proposed technique as more rapid and sustainable method of synthesizing inverse opal materials than conventional coating processes in the liquid phase and in the vapor phase.
Page
 2178 - 2182
Full Text
 PDF (ERRATUM)

How to access to the WOL for The Bulletin of the Korean Chemical Society ?

The Bulletin of the Korean Chemical Society will be co-published with Wiley-VCH from 2015 towards. The online version of the Journal will thus be available on Wiley Online Library, Wiley(-VCH)'s global online platform.

KCS members can get a free online access to the Bulletin of the Korean Chemical Society in WOL.

Close