Microscopic characterization of FO/PRO membranes : a comparative study of CLSM, TEM and SEM

Osmotically driven membrane processes (including forward osmosis (FO) and pressure retarded osmosis (PRO)) have received increasing attention in recent decades. The performance of an FO/PRO membrane is significantly limited by internal concentration polarization, which is a strong function of the me...

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Main Authors: Wang, Yi-Ning, Wei, Jing, She, Qianhong, Pacheco, Federico, Tang, Chuyang Y.
Other Authors: School of Civil and Environmental Engineering
Format: Article
Language:English
Published: 2013
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Online Access:https://hdl.handle.net/10356/98579
http://hdl.handle.net/10220/16243
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-985792020-03-07T11:43:29Z Microscopic characterization of FO/PRO membranes : a comparative study of CLSM, TEM and SEM Wang, Yi-Ning Wei, Jing She, Qianhong Pacheco, Federico Tang, Chuyang Y. School of Civil and Environmental Engineering Singapore Membrane Technology Centre DRNTU::Engineering::Environmental engineering DRNTU::Engineering::Civil engineering Osmotically driven membrane processes (including forward osmosis (FO) and pressure retarded osmosis (PRO)) have received increasing attention in recent decades. The performance of an FO/PRO membrane is significantly limited by internal concentration polarization, which is a strong function of the membrane support layer pore structure. The objective of the current study was to develop microscopic characterization methods for quantitative/semiquantitative analysis of membrane pore structure (both pore diameter and porosity distribution across membrane thickness). The use of confocal laser scanning microscopy (CLSM) for noninvasive characterization of the internal pore structure of FO/PRO membranes is reported for the first time. By performing optical sectioning, information on pore diameter, porosity depth profile and pore connectivity can be obtained. The CLSM porosity results are further compared to those obtained using scanning electron microscopy (SEM) and transmission electron microscopy (TEM), and reasonably good agreement was observed. A comparison of these characterization methods reveals their complementary nature, and a combination of these techniques may allow a more comprehensive understanding of membrane structure. The current study also provided a comprehensive insight into the pore structure of commercially available FO/PRO membranes. 2013-10-04T01:56:55Z 2019-12-06T19:57:03Z 2013-10-04T01:56:55Z 2019-12-06T19:57:03Z 2012 2012 Journal Article Wang, Y. N., Wei, J., She, Q., Pacheco, F., & Tang, C. Y. (2012). Microscopic characterization of FO/PRO membranes : a comparative study of CLSM, TEM and SEM. Environmental science & technology, 46(18), 9995-10003. https://hdl.handle.net/10356/98579 http://hdl.handle.net/10220/16243 10.1021/es301885m en Environmental science & technology
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic DRNTU::Engineering::Environmental engineering
DRNTU::Engineering::Civil engineering
spellingShingle DRNTU::Engineering::Environmental engineering
DRNTU::Engineering::Civil engineering
Wang, Yi-Ning
Wei, Jing
She, Qianhong
Pacheco, Federico
Tang, Chuyang Y.
Microscopic characterization of FO/PRO membranes : a comparative study of CLSM, TEM and SEM
description Osmotically driven membrane processes (including forward osmosis (FO) and pressure retarded osmosis (PRO)) have received increasing attention in recent decades. The performance of an FO/PRO membrane is significantly limited by internal concentration polarization, which is a strong function of the membrane support layer pore structure. The objective of the current study was to develop microscopic characterization methods for quantitative/semiquantitative analysis of membrane pore structure (both pore diameter and porosity distribution across membrane thickness). The use of confocal laser scanning microscopy (CLSM) for noninvasive characterization of the internal pore structure of FO/PRO membranes is reported for the first time. By performing optical sectioning, information on pore diameter, porosity depth profile and pore connectivity can be obtained. The CLSM porosity results are further compared to those obtained using scanning electron microscopy (SEM) and transmission electron microscopy (TEM), and reasonably good agreement was observed. A comparison of these characterization methods reveals their complementary nature, and a combination of these techniques may allow a more comprehensive understanding of membrane structure. The current study also provided a comprehensive insight into the pore structure of commercially available FO/PRO membranes.
author2 School of Civil and Environmental Engineering
author_facet School of Civil and Environmental Engineering
Wang, Yi-Ning
Wei, Jing
She, Qianhong
Pacheco, Federico
Tang, Chuyang Y.
format Article
author Wang, Yi-Ning
Wei, Jing
She, Qianhong
Pacheco, Federico
Tang, Chuyang Y.
author_sort Wang, Yi-Ning
title Microscopic characterization of FO/PRO membranes : a comparative study of CLSM, TEM and SEM
title_short Microscopic characterization of FO/PRO membranes : a comparative study of CLSM, TEM and SEM
title_full Microscopic characterization of FO/PRO membranes : a comparative study of CLSM, TEM and SEM
title_fullStr Microscopic characterization of FO/PRO membranes : a comparative study of CLSM, TEM and SEM
title_full_unstemmed Microscopic characterization of FO/PRO membranes : a comparative study of CLSM, TEM and SEM
title_sort microscopic characterization of fo/pro membranes : a comparative study of clsm, tem and sem
publishDate 2013
url https://hdl.handle.net/10356/98579
http://hdl.handle.net/10220/16243
_version_ 1681039906299707392