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Simple surface modification of steel mesh for efficient oil/water separation via gravity filtration

Improving surface chemistry of a material is important for oil/water separation. In this work, we demonstrated a simple approach that could be employed to flexibly modify the properties of steel mesh to be either hydrophi-licity or hydrophobicity for oil/water separation via gravity filtration. Dip-...

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Main Authors: Roslan, Rosyiela Azwa, Lau, Woei Jye, Ong, Chi Siang, Tan, Yong Zen, Ismail, Ahmad Fauzi
Format: Article
Published: Elsevier Ltd 2023
Subjects:
Q Science (General)
TP Chemical technology
Online Access:http://eprints.utm.my/105035/
http://dx.doi.org/10.1016/j.jwpe.2023.104063
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spelling my.utm.1050352024-04-02T06:35:16Z http://eprints.utm.my/105035/ Simple surface modification of steel mesh for efficient oil/water separation via gravity filtration Roslan, Rosyiela Azwa Lau, Woei Jye Ong, Chi Siang Tan, Yong Zen Ismail, Ahmad Fauzi Q Science (General) TP Chemical technology Improving surface chemistry of a material is important for oil/water separation. In this work, we demonstrated a simple approach that could be employed to flexibly modify the properties of steel mesh to be either hydrophi-licity or hydrophobicity for oil/water separation via gravity filtration. Dip-coating method was used to form a coating layer atop the mesh. Polyvinylpyrrolidone (PVP) and polyethylene glycol (PEG) were used to prepare hydrophilic coating, while poly(4-vinylpyridine) (P4VP) and triethoxy(octadecyl)silane (TEOS) were used to promote the mesh's hydrophobicity. Our findings showed that the mesh coated with PVP and PEG displayed improved surface hydrophilicity (i.e. lower water contact angle (WCA)) which led to increased water flux. Oppositely, the WCA of mesh increased from 126.4o to 135.3o and 142.5o , respectively when P4VP and TEOS were used as coating material. The PEG-coated mesh is the best filter in producing water as permeate (up to 578 L/m2.h) while the TEOS-coated mesh is excellent in transporting organic solvents (e.g., toluene, n-hexane and chloroform), achieving 999-1205 L/m2.h. The results also indicated that the modified meshes were able to attain >98 % oil/water separation efficiency with either oil or water as the permeate. The flux of modified-mesh was also stable over 20 filtration cycles and did not experience major changes after being immersed in toluene for 30 days. Our work demonstrated an alternative efficient way of treating oil/water mixture via gravity filtration in which either water or oil could be the permeate product depending on the surface properties of the mesh chosen. Elsevier Ltd 2023-08 Article PeerReviewed Roslan, Rosyiela Azwa and Lau, Woei Jye and Ong, Chi Siang and Tan, Yong Zen and Ismail, Ahmad Fauzi (2023) Simple surface modification of steel mesh for efficient oil/water separation via gravity filtration. Journal of Water Process Engineering, 54 (NA). NA. ISSN 2214-7144 http://dx.doi.org/10.1016/j.jwpe.2023.104063 DOI:10.1016/j.jwpe.2023.104063
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic Q Science (General)
TP Chemical technology
spellingShingle Q Science (General)
TP Chemical technology
Roslan, Rosyiela Azwa
Lau, Woei Jye
Ong, Chi Siang
Tan, Yong Zen
Ismail, Ahmad Fauzi
Simple surface modification of steel mesh for efficient oil/water separation via gravity filtration
description Improving surface chemistry of a material is important for oil/water separation. In this work, we demonstrated a simple approach that could be employed to flexibly modify the properties of steel mesh to be either hydrophi-licity or hydrophobicity for oil/water separation via gravity filtration. Dip-coating method was used to form a coating layer atop the mesh. Polyvinylpyrrolidone (PVP) and polyethylene glycol (PEG) were used to prepare hydrophilic coating, while poly(4-vinylpyridine) (P4VP) and triethoxy(octadecyl)silane (TEOS) were used to promote the mesh's hydrophobicity. Our findings showed that the mesh coated with PVP and PEG displayed improved surface hydrophilicity (i.e. lower water contact angle (WCA)) which led to increased water flux. Oppositely, the WCA of mesh increased from 126.4o to 135.3o and 142.5o , respectively when P4VP and TEOS were used as coating material. The PEG-coated mesh is the best filter in producing water as permeate (up to 578 L/m2.h) while the TEOS-coated mesh is excellent in transporting organic solvents (e.g., toluene, n-hexane and chloroform), achieving 999-1205 L/m2.h. The results also indicated that the modified meshes were able to attain >98 % oil/water separation efficiency with either oil or water as the permeate. The flux of modified-mesh was also stable over 20 filtration cycles and did not experience major changes after being immersed in toluene for 30 days. Our work demonstrated an alternative efficient way of treating oil/water mixture via gravity filtration in which either water or oil could be the permeate product depending on the surface properties of the mesh chosen.
format Article
author Roslan, Rosyiela Azwa
Lau, Woei Jye
Ong, Chi Siang
Tan, Yong Zen
Ismail, Ahmad Fauzi
author_facet Roslan, Rosyiela Azwa
Lau, Woei Jye
Ong, Chi Siang
Tan, Yong Zen
Ismail, Ahmad Fauzi
author_sort Roslan, Rosyiela Azwa
title Simple surface modification of steel mesh for efficient oil/water separation via gravity filtration
title_short Simple surface modification of steel mesh for efficient oil/water separation via gravity filtration
title_full Simple surface modification of steel mesh for efficient oil/water separation via gravity filtration
title_fullStr Simple surface modification of steel mesh for efficient oil/water separation via gravity filtration
title_full_unstemmed Simple surface modification of steel mesh for efficient oil/water separation via gravity filtration
title_sort simple surface modification of steel mesh for efficient oil/water separation via gravity filtration
publisher Elsevier Ltd
publishDate 2023
url http://eprints.utm.my/105035/
http://dx.doi.org/10.1016/j.jwpe.2023.104063
_version_ 1797905921443102720
score 13.211869

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