TY - JOUR
T1 - High-performance polyamide thin-film composite nanofiltration membrane
T2 - Role of thermal treatment
AU - Liu, Baicang
AU - Wang, Shuai
AU - Zhao, Pingju
AU - Liang, Heng
AU - Zhang, Wen
AU - Crittenden, John
N1 - Funding Information:
We are extremely grateful to the National Natural Science Foundation of China (Award Number 51678377), Sichuan University Outstanding Youth Foundation ( 2015SCU04A35 ), Applied Basic Research of Sichuan Province ( 2017JY0238 ), and Litree Purifying Technology Co., Ltd ( 16H0155 ). We appreciate the assistance provided by Dr. Ming Ye and Dengli Qiu from Bruker Nano Surfaces Division with the AFM measurements, Songmiao Liang from Vontron Technology Co., Ltd. with the membrane surface zeta potential measurements, and Meibo He from Sichuan University with the water permeability and salt rejections measurements.
Publisher Copyright:
© 2017 Elsevier B.V.
PY - 2018/3/30
Y1 - 2018/3/30
N2 - Nanofiltration (NF) membranes have many excellent applications (e.g., removing multivalent ions and pretreating water before reverse osmosis, RO), but their relatively high cost limits their application. Especially in recent years, researchers have paid substantial attention to reducing the cost of NF membranes. In this paper, high-performance NF membranes were fabricated using interfacial polymerization (IP) methods. The polymer concentration, IP solution concentration, and thermal treatment conditions were varied. The synthesized membranes were characterized using scanning electron microscopy (SEM), atomic force microscopy (AFM), a contact angle goniometer, X-ray photoelectron spectroscopy (XPS), attenuated total reflectance fourier transform infrared (ATR-FTIR) spectroscopy, and performance tests. The results show that water flux was significantly improved using a hot-water thermal treatment method. Our fabricated thermal-treated NF membrane had an approximately 15% higher water permeability with a value of 13.6 L/(m 2 h bar) than that of the commercially available GE HL membrane with a value of 11.8 L/(m 2 h bar). Our membranes had the same MgSO 4 rejection as that of the GE HL membrane. We found that the thermal treatment causes the NF membrane surface to be smoother and have a high crosslinking degree.
AB - Nanofiltration (NF) membranes have many excellent applications (e.g., removing multivalent ions and pretreating water before reverse osmosis, RO), but their relatively high cost limits their application. Especially in recent years, researchers have paid substantial attention to reducing the cost of NF membranes. In this paper, high-performance NF membranes were fabricated using interfacial polymerization (IP) methods. The polymer concentration, IP solution concentration, and thermal treatment conditions were varied. The synthesized membranes were characterized using scanning electron microscopy (SEM), atomic force microscopy (AFM), a contact angle goniometer, X-ray photoelectron spectroscopy (XPS), attenuated total reflectance fourier transform infrared (ATR-FTIR) spectroscopy, and performance tests. The results show that water flux was significantly improved using a hot-water thermal treatment method. Our fabricated thermal-treated NF membrane had an approximately 15% higher water permeability with a value of 13.6 L/(m 2 h bar) than that of the commercially available GE HL membrane with a value of 11.8 L/(m 2 h bar). Our membranes had the same MgSO 4 rejection as that of the GE HL membrane. We found that the thermal treatment causes the NF membrane surface to be smoother and have a high crosslinking degree.
KW - Interfacial polymerization
KW - Membrane
KW - Nanofiltration
KW - Thermal treatment
KW - Thin-film composite
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U2 - 10.1016/j.apsusc.2017.11.126
DO - 10.1016/j.apsusc.2017.11.126
M3 - Article
AN - SCOPUS:85034752544
SN - 0169-4332
VL - 435
SP - 415
EP - 423
JO - Applied Surface Science
JF - Applied Surface Science
ER -