Direct Formation of Phenolic/Furfural Aerogel Microspheres in Supercritical CO2

Kyung Nam Lee, Hae Joon Lee, Jun Young Lee, Jung Hyun Kim

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

P/F aerogel microspheres were successfully produced in one-step method by solemulsion-gel technique in supercritical CO2. The solubility of alcohol in supercritical CO2 varied with temperature and pressure of the system. When the dispersion phase is insoluble in supercritical CO2, it could be emulsified in CO2 by means of a CO2-soluble stabilizer with high temperature and low pressure, phase separation occurred and led to the formation of phenolic/furfural (P/F) gel microspheres. At the inversion of process condition, alcohol in the P/F gel microspheres was then exchanged with supercritical CO2 continuously, which was supercritically dried to obtain organic aerogel microspheres. CO2-soluble poly(dimethylsiloxane) (PDMS) was used as the stabilizer in this system. Spherical morphology of the gel microspheres was confirmed by scanning electron microscopy. Particle size and particle size distribution of P/F aerogel microspheres can be modified upon variation of the solids and the stabilizer content. The resultant P/F aerogel microspheres have average particle size in the range of 1-6 μm. The pore surface area of P/F aerogel microspheres can be modified upon variation of the solids content and phenolic/catalyst (P/C) weight ratio.

Original languageEnglish
Pages (from-to)79-87
Number of pages9
JournalJournal of Dispersion Science and Technology
Volume22
Issue number1
DOIs
Publication statusPublished - 2001 Jan 1

Fingerprint

Furaldehyde
Furfural
Aerogels
aerogels
Microspheres
gels
Gels
alcohols
Alcohols
particle size distribution
Particle size
solubility
low pressure
inversions
porosity
Polydimethylsiloxane
catalysts
scanning electron microscopy
Particle size analysis
Phase separation

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Polymers and Plastics

Cite this

@article{7b7c29acc61b4d458b21762874bf9ead,
title = "Direct Formation of Phenolic/Furfural Aerogel Microspheres in Supercritical CO2",
abstract = "P/F aerogel microspheres were successfully produced in one-step method by solemulsion-gel technique in supercritical CO2. The solubility of alcohol in supercritical CO2 varied with temperature and pressure of the system. When the dispersion phase is insoluble in supercritical CO2, it could be emulsified in CO2 by means of a CO2-soluble stabilizer with high temperature and low pressure, phase separation occurred and led to the formation of phenolic/furfural (P/F) gel microspheres. At the inversion of process condition, alcohol in the P/F gel microspheres was then exchanged with supercritical CO2 continuously, which was supercritically dried to obtain organic aerogel microspheres. CO2-soluble poly(dimethylsiloxane) (PDMS) was used as the stabilizer in this system. Spherical morphology of the gel microspheres was confirmed by scanning electron microscopy. Particle size and particle size distribution of P/F aerogel microspheres can be modified upon variation of the solids and the stabilizer content. The resultant P/F aerogel microspheres have average particle size in the range of 1-6 μm. The pore surface area of P/F aerogel microspheres can be modified upon variation of the solids content and phenolic/catalyst (P/C) weight ratio.",
author = "Lee, {Kyung Nam} and Lee, {Hae Joon} and Lee, {Jun Young} and Kim, {Jung Hyun}",
year = "2001",
month = "1",
day = "1",
doi = "10.1081/DIS-100102682",
language = "English",
volume = "22",
pages = "79--87",
journal = "Journal of Dispersion Science and Technology",
issn = "0193-2691",
publisher = "Taylor and Francis Ltd.",
number = "1",

}

Direct Formation of Phenolic/Furfural Aerogel Microspheres in Supercritical CO2. / Lee, Kyung Nam; Lee, Hae Joon; Lee, Jun Young; Kim, Jung Hyun.

In: Journal of Dispersion Science and Technology, Vol. 22, No. 1, 01.01.2001, p. 79-87.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Direct Formation of Phenolic/Furfural Aerogel Microspheres in Supercritical CO2

AU - Lee, Kyung Nam

AU - Lee, Hae Joon

AU - Lee, Jun Young

AU - Kim, Jung Hyun

PY - 2001/1/1

Y1 - 2001/1/1

N2 - P/F aerogel microspheres were successfully produced in one-step method by solemulsion-gel technique in supercritical CO2. The solubility of alcohol in supercritical CO2 varied with temperature and pressure of the system. When the dispersion phase is insoluble in supercritical CO2, it could be emulsified in CO2 by means of a CO2-soluble stabilizer with high temperature and low pressure, phase separation occurred and led to the formation of phenolic/furfural (P/F) gel microspheres. At the inversion of process condition, alcohol in the P/F gel microspheres was then exchanged with supercritical CO2 continuously, which was supercritically dried to obtain organic aerogel microspheres. CO2-soluble poly(dimethylsiloxane) (PDMS) was used as the stabilizer in this system. Spherical morphology of the gel microspheres was confirmed by scanning electron microscopy. Particle size and particle size distribution of P/F aerogel microspheres can be modified upon variation of the solids and the stabilizer content. The resultant P/F aerogel microspheres have average particle size in the range of 1-6 μm. The pore surface area of P/F aerogel microspheres can be modified upon variation of the solids content and phenolic/catalyst (P/C) weight ratio.

AB - P/F aerogel microspheres were successfully produced in one-step method by solemulsion-gel technique in supercritical CO2. The solubility of alcohol in supercritical CO2 varied with temperature and pressure of the system. When the dispersion phase is insoluble in supercritical CO2, it could be emulsified in CO2 by means of a CO2-soluble stabilizer with high temperature and low pressure, phase separation occurred and led to the formation of phenolic/furfural (P/F) gel microspheres. At the inversion of process condition, alcohol in the P/F gel microspheres was then exchanged with supercritical CO2 continuously, which was supercritically dried to obtain organic aerogel microspheres. CO2-soluble poly(dimethylsiloxane) (PDMS) was used as the stabilizer in this system. Spherical morphology of the gel microspheres was confirmed by scanning electron microscopy. Particle size and particle size distribution of P/F aerogel microspheres can be modified upon variation of the solids and the stabilizer content. The resultant P/F aerogel microspheres have average particle size in the range of 1-6 μm. The pore surface area of P/F aerogel microspheres can be modified upon variation of the solids content and phenolic/catalyst (P/C) weight ratio.

UR - http://www.scopus.com/inward/record.url?scp=0035055218&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0035055218&partnerID=8YFLogxK

U2 - 10.1081/DIS-100102682

DO - 10.1081/DIS-100102682

M3 - Article

AN - SCOPUS:0035055218

VL - 22

SP - 79

EP - 87

JO - Journal of Dispersion Science and Technology

JF - Journal of Dispersion Science and Technology

SN - 0193-2691

IS - 1

ER -