Preparation and characterization of a new asymmetric type of Shirasu porous glass (SPG) membrane used for membrane emulsification

Masato Kukizaki, Masahiro Goto

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

To obtain a high throughput of the dispersed-phase flux through a Shirasu porous glass (SPG) membrane in membrane emulsification, a new type of asymmetric SPG membrane was prepared from two types of primary glass in the NaO-CaO-Al2O3-B2O3-ZrO2-SiO2 system with different growth rates of phase separation. The Al2O3-rich primary glass with a slower phase separation growth rate and the B2O3-rich primary glass with a faster growth rate were laminated in two layers to be formed into a tube at 1373 K. The primary glass tube was heat-treated at 993 K for 30 h to cause the phase separation, and subsequently leached out with hydrochloric acid, resulting in an asymmetric tubular SPG membrane. The asymmetric SPG membrane consisted of an inner skin layer 25 ± 2 μm thick and a support layer 405 ± 5 μm in thickness. The mean pore diameters of the skin and support layers were 0.67 and 4.7 μm, respectively. With the asymmetric membrane, uniform-sized emulsion droplets were prepared by a membrane emulsification technique. The dispersed-phase flux through the asymmetric membrane increased by a factor of approximately 20 or more compared with that through the symmetric membrane, due to the much smaller hydrodynamic resistance of the asymmetric membrane than that of the symmetric membrane.

Original languageEnglish
Pages (from-to)190-199
Number of pages10
JournalJournal of Membrane Science
Volume299
Issue number1-2
DOIs
Publication statusPublished - Aug 1 2007

Fingerprint

Emulsification
Glass
membranes
Membranes
preparation
glass
Phase separation
Skin
Growth
Fluxes
tubes
Hydrochloric Acid
hydrochloric acid
Hydrodynamics
Hydrochloric acid
Emulsions
emulsions
Hot Temperature
hydrodynamics
Throughput

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Filtration and Separation

Cite this

Preparation and characterization of a new asymmetric type of Shirasu porous glass (SPG) membrane used for membrane emulsification. / Kukizaki, Masato; Goto, Masahiro.

In: Journal of Membrane Science, Vol. 299, No. 1-2, 01.08.2007, p. 190-199.

Research output: Contribution to journalArticle

@article{0cd26eefd6c34344a25a64489ef01156,
title = "Preparation and characterization of a new asymmetric type of Shirasu porous glass (SPG) membrane used for membrane emulsification",
abstract = "To obtain a high throughput of the dispersed-phase flux through a Shirasu porous glass (SPG) membrane in membrane emulsification, a new type of asymmetric SPG membrane was prepared from two types of primary glass in the NaO-CaO-Al2O3-B2O3-ZrO2-SiO2 system with different growth rates of phase separation. The Al2O3-rich primary glass with a slower phase separation growth rate and the B2O3-rich primary glass with a faster growth rate were laminated in two layers to be formed into a tube at 1373 K. The primary glass tube was heat-treated at 993 K for 30 h to cause the phase separation, and subsequently leached out with hydrochloric acid, resulting in an asymmetric tubular SPG membrane. The asymmetric SPG membrane consisted of an inner skin layer 25 ± 2 μm thick and a support layer 405 ± 5 μm in thickness. The mean pore diameters of the skin and support layers were 0.67 and 4.7 μm, respectively. With the asymmetric membrane, uniform-sized emulsion droplets were prepared by a membrane emulsification technique. The dispersed-phase flux through the asymmetric membrane increased by a factor of approximately 20 or more compared with that through the symmetric membrane, due to the much smaller hydrodynamic resistance of the asymmetric membrane than that of the symmetric membrane.",
author = "Masato Kukizaki and Masahiro Goto",
year = "2007",
month = "8",
day = "1",
doi = "10.1016/j.memsci.2007.04.040",
language = "English",
volume = "299",
pages = "190--199",
journal = "Journal of Membrane Science",
issn = "0376-7388",
publisher = "Elsevier",
number = "1-2",

}

TY - JOUR

T1 - Preparation and characterization of a new asymmetric type of Shirasu porous glass (SPG) membrane used for membrane emulsification

AU - Kukizaki, Masato

AU - Goto, Masahiro

PY - 2007/8/1

Y1 - 2007/8/1

N2 - To obtain a high throughput of the dispersed-phase flux through a Shirasu porous glass (SPG) membrane in membrane emulsification, a new type of asymmetric SPG membrane was prepared from two types of primary glass in the NaO-CaO-Al2O3-B2O3-ZrO2-SiO2 system with different growth rates of phase separation. The Al2O3-rich primary glass with a slower phase separation growth rate and the B2O3-rich primary glass with a faster growth rate were laminated in two layers to be formed into a tube at 1373 K. The primary glass tube was heat-treated at 993 K for 30 h to cause the phase separation, and subsequently leached out with hydrochloric acid, resulting in an asymmetric tubular SPG membrane. The asymmetric SPG membrane consisted of an inner skin layer 25 ± 2 μm thick and a support layer 405 ± 5 μm in thickness. The mean pore diameters of the skin and support layers were 0.67 and 4.7 μm, respectively. With the asymmetric membrane, uniform-sized emulsion droplets were prepared by a membrane emulsification technique. The dispersed-phase flux through the asymmetric membrane increased by a factor of approximately 20 or more compared with that through the symmetric membrane, due to the much smaller hydrodynamic resistance of the asymmetric membrane than that of the symmetric membrane.

AB - To obtain a high throughput of the dispersed-phase flux through a Shirasu porous glass (SPG) membrane in membrane emulsification, a new type of asymmetric SPG membrane was prepared from two types of primary glass in the NaO-CaO-Al2O3-B2O3-ZrO2-SiO2 system with different growth rates of phase separation. The Al2O3-rich primary glass with a slower phase separation growth rate and the B2O3-rich primary glass with a faster growth rate were laminated in two layers to be formed into a tube at 1373 K. The primary glass tube was heat-treated at 993 K for 30 h to cause the phase separation, and subsequently leached out with hydrochloric acid, resulting in an asymmetric tubular SPG membrane. The asymmetric SPG membrane consisted of an inner skin layer 25 ± 2 μm thick and a support layer 405 ± 5 μm in thickness. The mean pore diameters of the skin and support layers were 0.67 and 4.7 μm, respectively. With the asymmetric membrane, uniform-sized emulsion droplets were prepared by a membrane emulsification technique. The dispersed-phase flux through the asymmetric membrane increased by a factor of approximately 20 or more compared with that through the symmetric membrane, due to the much smaller hydrodynamic resistance of the asymmetric membrane than that of the symmetric membrane.

UR - http://www.scopus.com/inward/record.url?scp=34250771469&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34250771469&partnerID=8YFLogxK

U2 - 10.1016/j.memsci.2007.04.040

DO - 10.1016/j.memsci.2007.04.040

M3 - Article

AN - SCOPUS:34250771469

VL - 299

SP - 190

EP - 199

JO - Journal of Membrane Science

JF - Journal of Membrane Science

SN - 0376-7388

IS - 1-2

ER -