Download Zwitterionic Antifouling Coatings for the Purification of High

Supporting information for
Zwitterionic Antifouling Coatings for the
Purification of High-Salinity Shale Gas Produced
Water
Rong Yang†, Esma Goktekin‡, and Karen K. Gleason†*
†Department of Chemical Engineering, Massachusetts Institute of Technology
77 Massachusetts Avenue, Cambridge, Massachusetts, 02139 (USA)
‡ Department of Chemical Engineering, Northeastern University
Boston, MA 02115, USA
KEYWORDS. Zwitterion, chemical vapor deposition, antifouling, water purification, hydraulic
fracturing, shale gas produced water.
Table S1. Areas of peaks representing zwitterionic group and pyridine ring in Fourier transform
infrared (FTIR) spectra taken with transmission and attenuated total reflectance (ATR) modes.
Functional group
Zwitterion
Pyridine ring
Transmission
0.05
0.05
ATR
1.76
0.02
Table S2. Thicknesses of polymer thin films with various cross-linking densities under dry and
swollen states measured using in situ ellipsometry.
Dry thickness/nm
DVB
pVD2
pVD1
p4VP
41.1
123.7
206.8
82.3
131.2
194.2
350.1
359.8
405.0
292.3
332.7
343.5
Thickness in DI
water/nm
43.5
123.2
210.7
87.9
133.7
210.3
430.0
385.8
467.4
326.2
417.9
388.2
Thickness in salt
water/nm
40.8
124.1
212.5
87.2
139.7
209.8
412.5
387.3
465.6
n.a.
n.a.
n.a.