Please use this identifier to cite or link to this item: https://doi.org/10.1021/acs.langmuir.8b03560
Title: Robust Oil-Fouling Resistance of Amorphous Cellulose Surface Underwater: A Wetting Study and Application
Authors: Zhou, Xin
Koh, J Justin 
He, Chaobin 
Keywords: Science & Technology
Physical Sciences
Technology
Chemistry, Multidisciplinary
Chemistry, Physical
Materials Science, Multidisciplinary
Chemistry
Materials Science
WATER
DESIGN
SUPERHYDROPHILICITY
SUPEROLEOPHOBICITY
COATINGS
Issue Date: 29-Jan-2019
Publisher: AMER CHEMICAL SOC
Citation: Zhou, Xin, Koh, J Justin, He, Chaobin (2019-01-29). Robust Oil-Fouling Resistance of Amorphous Cellulose Surface Underwater: A Wetting Study and Application. LANGMUIR 35 (4) : 839-847. ScholarBank@NUS Repository. https://doi.org/10.1021/acs.langmuir.8b03560
Abstract: © 2019 American Chemical Society. The antioil-fouling characteristic of an amorphous cellulose (a-cellulose) surface was elucidated using the sessile droplet method (static) and a modified Wilhelmy plate technique (dynamic). As compared to other hydrophilic surfaces (cellulose acetate, poly(vinyl alcohol), and glass), the oil (poly(dimethylsiloxane)) contact angle on the a-cellulose surface underwater shows the largest value (170.5 ± 5.0°), having the smallest deviation from its theoretical value (180.0°) as estimated by Young's equation. Also, the a-cellulose surface demonstrates the strongest affinity with water in an oil medium (stable hydrophilicity). Moreover, the work of adhesion between the receding oil phase and a-cellulose underwater is quantified to be 10.3 mN/m, approximately one-fourth of that in air (42.0 mN/m). The overall wetting study suggests a rather low oil/solid/water three-phase contact line (TPL) friction in the direction that water displaces oil. A proposed mechanism attributes these phenomena to the water-accessible rigid cellulose chains and supramolecular structure of a-cellulose. The former hinders molecular rearrangement during processing or upon exposure to oil, such that its polar hydroxyl groups are readily accessible to water, thereby retaining its hydrophilicity. The latter allows water to diffuse across the TPL, forming the hydration shells that weaken the van der Waals interactions between oil and cellulose chains. Such findings of the a-cellulose surface can be exploited to fabricate mesh membranes with high water permeation flux (375.4 ± 13.5 L m -2 h -1 Pa -1 ), high oil/water separation efficiency (93-98%), and long-lasting stability, which is suitable for offshore oil spill remediation.
Source Title: LANGMUIR
URI: https://scholarbank.nus.edu.sg/handle/10635/155326
ISSN: 0743-7463
1520-5827
DOI: 10.1021/acs.langmuir.8b03560
Appears in Collections:Staff Publications
Elements

Show full item record
Files in This Item:
File Description SizeFormatAccess SettingsVersion 
Published Paper.pdf5.55 MBAdobe PDF

OPEN

NoneView/Download

SCOPUSTM   
Citations

9
checked on Aug 7, 2022

Page view(s)

248
checked on Aug 4, 2022

Download(s)

4
checked on Aug 4, 2022

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.