Abstract
Surface wetting on polyelectrolyte multilayers (PEMs), prepared by alternating deposition of polydiallyldimethylammonium chloride (PDDA) and poly(styrene sulfonate) (PSS), was investigated mainly in water-solid-oil systems. The surface-wetting behavior of as-prepared PEMs was well correlated to the molecular structures of the uncompensated ionic groups on the PEMs as revealed by sum frequency generation vibrational and X-ray photoelectron spectroscopies. The orientation change of the benzenesulfonate groups on the PSS-capped surfaces causes poor water wetting in oil or air and negligible oil wetting in water, while the orientation change of the quaternized pyrrolidine rings on the PDDA-capped surfaces hardly affects their wetting behavior. The underwater oil repellency of PSS-capped PEMs was successfully harnessed to manufacture highly efficient filters for oil-water separation at high flux.
| Original language | English |
|---|---|
| Pages (from-to) | 4851-4856 |
| Number of pages | 6 |
| Journal | Angewandte Chemie - International Edition |
| Volume | 54 |
| Issue number | 16 |
| DOIs | |
| Publication status | Published - 2015 Apr 13 |
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Keywords
- interfaces
- oil-water separation
- photoelectronspectroscopy
- structure elucidation
- surface chemistry
ASJC Scopus subject areas
- Chemistry(all)
- Catalysis
Cite this
Ion-specific oil repellency of polyelectrolyte multilayers in water : Molecular insights into the hydrophilicity of charged surfaces. / Liu, Xiaokong; Leng, Chuan; Yu, Li; He, Ke; Brown, Lauren Joan; Chen, Zhan; Cho, Jinhan; Wang, Dayang.
In: Angewandte Chemie - International Edition, Vol. 54, No. 16, 13.04.2015, p. 4851-4856.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Ion-specific oil repellency of polyelectrolyte multilayers in water
T2 - Molecular insights into the hydrophilicity of charged surfaces
AU - Liu, Xiaokong
AU - Leng, Chuan
AU - Yu, Li
AU - He, Ke
AU - Brown, Lauren Joan
AU - Chen, Zhan
AU - Cho, Jinhan
AU - Wang, Dayang
PY - 2015/4/13
Y1 - 2015/4/13
N2 - Surface wetting on polyelectrolyte multilayers (PEMs), prepared by alternating deposition of polydiallyldimethylammonium chloride (PDDA) and poly(styrene sulfonate) (PSS), was investigated mainly in water-solid-oil systems. The surface-wetting behavior of as-prepared PEMs was well correlated to the molecular structures of the uncompensated ionic groups on the PEMs as revealed by sum frequency generation vibrational and X-ray photoelectron spectroscopies. The orientation change of the benzenesulfonate groups on the PSS-capped surfaces causes poor water wetting in oil or air and negligible oil wetting in water, while the orientation change of the quaternized pyrrolidine rings on the PDDA-capped surfaces hardly affects their wetting behavior. The underwater oil repellency of PSS-capped PEMs was successfully harnessed to manufacture highly efficient filters for oil-water separation at high flux.
AB - Surface wetting on polyelectrolyte multilayers (PEMs), prepared by alternating deposition of polydiallyldimethylammonium chloride (PDDA) and poly(styrene sulfonate) (PSS), was investigated mainly in water-solid-oil systems. The surface-wetting behavior of as-prepared PEMs was well correlated to the molecular structures of the uncompensated ionic groups on the PEMs as revealed by sum frequency generation vibrational and X-ray photoelectron spectroscopies. The orientation change of the benzenesulfonate groups on the PSS-capped surfaces causes poor water wetting in oil or air and negligible oil wetting in water, while the orientation change of the quaternized pyrrolidine rings on the PDDA-capped surfaces hardly affects their wetting behavior. The underwater oil repellency of PSS-capped PEMs was successfully harnessed to manufacture highly efficient filters for oil-water separation at high flux.
KW - interfaces
KW - oil-water separation
KW - photoelectronspectroscopy
KW - structure elucidation
KW - surface chemistry
UR - http://www.scopus.com/inward/record.url?scp=84926453510&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84926453510&partnerID=8YFLogxK
U2 - 10.1002/anie.201411992
DO - 10.1002/anie.201411992
M3 - Article
C2 - 25703598
AN - SCOPUS:84926453510
VL - 54
SP - 4851
EP - 4856
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
SN - 1433-7851
IS - 16
ER -