Abstract
Silica hybrid membranes have been developed for use as reverse osmosis (RO) membranes by using a counter-diffusion chemical vapor deposition (CVD) method. A silica source (phenyltrimethoxysilane; PhTMOS) and O3 were provided at opposite sides of a porous alumina substrate at 300°C for 90 min. The RO permeation test was conducted for 100 mg L-1 NaCl at 3.0 MPa. The highest NaCl rejection was 94.2% for a total flux of 1.7 kg m-2 h-1. The module length is an important factor in obtaining highly selective RO membranes. The short module (6 cm) was better because of the higher O3 concentration in the module. The decomposition conditions of phenyl groups on the silica surface are discussed for the hydrolysis powder of PhTMOS. According to FT-IR measurements, phenyl groups remained on the silica surface after O3 treatment for 90 min at 300°C, whereas the number of silanol groups decreased by approximately 30% upon O3 treatment at 300°C. The high Na+ rejection can be explained by the reduction of the silanol groups in the membrane.
| Original language | English |
|---|---|
| Pages (from-to) | 574-578 |
| Number of pages | 5 |
| Journal | Journal of Chemical Engineering of Japan |
| Volume | 47 |
| Issue number | 7 SPECIAL ISSUE |
| DOIs | |
| Publication status | Published - 2014 |
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Keywords
- Counter diffusion CVD method
- Inorganic RO membranes
- Phenyltrimethoxysilane
ASJC Scopus subject areas
- Chemical Engineering(all)
- Chemistry(all)
Cite this
Development of inorganic silica reverse osmosis membranes by using a counter-diffusion chemical vapor deposition method. / Ikeda, Ayumi; Matsuyama, Emi; Komatsuzaki, Makoto; Sasaki, Misa; Nomura, Mikihiro.
In: Journal of Chemical Engineering of Japan, Vol. 47, No. 7 SPECIAL ISSUE, 2014, p. 574-578.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Development of inorganic silica reverse osmosis membranes by using a counter-diffusion chemical vapor deposition method
AU - Ikeda, Ayumi
AU - Matsuyama, Emi
AU - Komatsuzaki, Makoto
AU - Sasaki, Misa
AU - Nomura, Mikihiro
PY - 2014
Y1 - 2014
N2 - Silica hybrid membranes have been developed for use as reverse osmosis (RO) membranes by using a counter-diffusion chemical vapor deposition (CVD) method. A silica source (phenyltrimethoxysilane; PhTMOS) and O3 were provided at opposite sides of a porous alumina substrate at 300°C for 90 min. The RO permeation test was conducted for 100 mg L-1 NaCl at 3.0 MPa. The highest NaCl rejection was 94.2% for a total flux of 1.7 kg m-2 h-1. The module length is an important factor in obtaining highly selective RO membranes. The short module (6 cm) was better because of the higher O3 concentration in the module. The decomposition conditions of phenyl groups on the silica surface are discussed for the hydrolysis powder of PhTMOS. According to FT-IR measurements, phenyl groups remained on the silica surface after O3 treatment for 90 min at 300°C, whereas the number of silanol groups decreased by approximately 30% upon O3 treatment at 300°C. The high Na+ rejection can be explained by the reduction of the silanol groups in the membrane.
AB - Silica hybrid membranes have been developed for use as reverse osmosis (RO) membranes by using a counter-diffusion chemical vapor deposition (CVD) method. A silica source (phenyltrimethoxysilane; PhTMOS) and O3 were provided at opposite sides of a porous alumina substrate at 300°C for 90 min. The RO permeation test was conducted for 100 mg L-1 NaCl at 3.0 MPa. The highest NaCl rejection was 94.2% for a total flux of 1.7 kg m-2 h-1. The module length is an important factor in obtaining highly selective RO membranes. The short module (6 cm) was better because of the higher O3 concentration in the module. The decomposition conditions of phenyl groups on the silica surface are discussed for the hydrolysis powder of PhTMOS. According to FT-IR measurements, phenyl groups remained on the silica surface after O3 treatment for 90 min at 300°C, whereas the number of silanol groups decreased by approximately 30% upon O3 treatment at 300°C. The high Na+ rejection can be explained by the reduction of the silanol groups in the membrane.
KW - Counter diffusion CVD method
KW - Inorganic RO membranes
KW - Phenyltrimethoxysilane
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UR - http://www.scopus.com/inward/citedby.url?scp=84905217495&partnerID=8YFLogxK
U2 - 10.1252/jcej.13we293
DO - 10.1252/jcej.13we293
M3 - Article
VL - 47
SP - 574
EP - 578
JO - Journal of Chemical Engineering of Japan
JF - Journal of Chemical Engineering of Japan
SN - 0021-9592
IS - 7 SPECIAL ISSUE
ER -