Variation of free volume and thickness by high pressure applied on thin film composite reverse osmosis membrane

Kyoung Hoon Chu; Ji Sung Mang; Jihun Lim; Seungkwan Hong; Moon Hyun Hwang

doi:10.1016/j.desal.2021.115365

Variation of free volume and thickness by high pressure applied on thin film composite reverse osmosis membrane

Kyoung Hoon Chu, Ji Sung Mang, Jihun Lim, Seungkwan Hong, Moon Hyun Hwang

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

Analytical technologies for polymeric membranes, including positron annihilation lifetime spectroscopy (PALS) and time-of-flight secondary ion mass spectrometry (ToF-SIMS), were employed to understand the origin and harmful effects of thin film composite (TFC) reverse osmosis (RO) membrane compaction. Although no variation in water flux exceeding 10% from the initial flux was observed under all compaction pressures, the hydraulic pressure induced by the high-pressure pump caused a rapid contraction of the free volume and thickness of the TFC RO membrane. In particular, due to the viscoelastic polymer properties of the active layer, a reduction of approximately 15% free volume and 48% thickness was observed at a compaction pressure of 60 bar. Consequently, the analytical procedures can provide a better understanding of membrane compaction during pressurized membrane processes and strategic development to reduce the harmful effects of membrane compaction.

Original language	English
Article number	115365
Journal	Desalination
Volume	520
DOIs	https://doi.org/10.1016/j.desal.2021.115365
Publication status	Published - 2021 Dec 15

Bibliographical note

Funding Information:
This work was supported by Korea Environment Industry & Technology Institute (KEITI) through Industrial Facilities & Infrastructure Research Program, funded by Korea Ministry of Environment (MOE) ( 146834 and 1485017292 ).

Publisher Copyright:
© 2021

Keywords

Free volume
Positron annihilation lifetime spectroscopy (PALS)
Reverse osmosis (RO) membrane compaction
Thickness
Time-of-flight secondary ion mass spectrometry (ToF-SIMS)

ASJC Scopus subject areas

Chemistry(all)
Chemical Engineering(all)
Materials Science(all)
Water Science and Technology
Mechanical Engineering

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10.1016/j.desal.2021.115365

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title = "Variation of free volume and thickness by high pressure applied on thin film composite reverse osmosis membrane",

abstract = "Analytical technologies for polymeric membranes, including positron annihilation lifetime spectroscopy (PALS) and time-of-flight secondary ion mass spectrometry (ToF-SIMS), were employed to understand the origin and harmful effects of thin film composite (TFC) reverse osmosis (RO) membrane compaction. Although no variation in water flux exceeding 10% from the initial flux was observed under all compaction pressures, the hydraulic pressure induced by the high-pressure pump caused a rapid contraction of the free volume and thickness of the TFC RO membrane. In particular, due to the viscoelastic polymer properties of the active layer, a reduction of approximately 15% free volume and 48% thickness was observed at a compaction pressure of 60 bar. Consequently, the analytical procedures can provide a better understanding of membrane compaction during pressurized membrane processes and strategic development to reduce the harmful effects of membrane compaction.",

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author = "Chu, {Kyoung Hoon} and Mang, {Ji Sung} and Jihun Lim and Seungkwan Hong and Hwang, {Moon Hyun}",

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AU - Chu, Kyoung Hoon

AU - Mang, Ji Sung

AU - Lim, Jihun

AU - Hong, Seungkwan

AU - Hwang, Moon Hyun

N1 - Funding Information: This work was supported by Korea Environment Industry & Technology Institute (KEITI) through Industrial Facilities & Infrastructure Research Program, funded by Korea Ministry of Environment (MOE) ( 146834 and 1485017292 ). Publisher Copyright: © 2021

PY - 2021/12/15

Y1 - 2021/12/15

N2 - Analytical technologies for polymeric membranes, including positron annihilation lifetime spectroscopy (PALS) and time-of-flight secondary ion mass spectrometry (ToF-SIMS), were employed to understand the origin and harmful effects of thin film composite (TFC) reverse osmosis (RO) membrane compaction. Although no variation in water flux exceeding 10% from the initial flux was observed under all compaction pressures, the hydraulic pressure induced by the high-pressure pump caused a rapid contraction of the free volume and thickness of the TFC RO membrane. In particular, due to the viscoelastic polymer properties of the active layer, a reduction of approximately 15% free volume and 48% thickness was observed at a compaction pressure of 60 bar. Consequently, the analytical procedures can provide a better understanding of membrane compaction during pressurized membrane processes and strategic development to reduce the harmful effects of membrane compaction.

AB - Analytical technologies for polymeric membranes, including positron annihilation lifetime spectroscopy (PALS) and time-of-flight secondary ion mass spectrometry (ToF-SIMS), were employed to understand the origin and harmful effects of thin film composite (TFC) reverse osmosis (RO) membrane compaction. Although no variation in water flux exceeding 10% from the initial flux was observed under all compaction pressures, the hydraulic pressure induced by the high-pressure pump caused a rapid contraction of the free volume and thickness of the TFC RO membrane. In particular, due to the viscoelastic polymer properties of the active layer, a reduction of approximately 15% free volume and 48% thickness was observed at a compaction pressure of 60 bar. Consequently, the analytical procedures can provide a better understanding of membrane compaction during pressurized membrane processes and strategic development to reduce the harmful effects of membrane compaction.

KW - Free volume

KW - Positron annihilation lifetime spectroscopy (PALS)

KW - Reverse osmosis (RO) membrane compaction

KW - Thickness

KW - Time-of-flight secondary ion mass spectrometry (ToF-SIMS)

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Variation of free volume and thickness by high pressure applied on thin film composite reverse osmosis membrane

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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