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Carbon Dots Incorporated Polysulfone Nanocomposite Membranes with High Water Fux and Fouling Resistance |
CHEN Bin1, ZHANG Jialu1, ZHANG Yan1, ZHAO Haichao2, ZHU Lijing2( ) |
1. School of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China 2. Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China |
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Cite this article:
CHEN Bin, ZHANG Jialu, ZHANG Yan, ZHAO Haichao, ZHU Lijing. Carbon Dots Incorporated Polysulfone Nanocomposite Membranes with High Water Fux and Fouling Resistance. Chinese Journal of Materials Research, 2020, 34(10): 761-769.
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Abstract Carbon dots (CDs) were synthesized from 4-aminosalicylic acid (ASA) by a hydrothermal carbonization technique and then incorporated into the membrane casting solution. Then polysulfone/carbon dots (PSF/CDs) nanocomposite membranes were prepared by non-solvent induced phase separation. The results of transmission electron microscopy (TEM) and Fourier transform infrared spectroscopy (FTIR) show that CDs with a lot of hydrophilic groups had been successfully synthesized. Water contact angle analysis (WCA), scanning probe microscope (SPM) and scanning electron microscope (SEM) were used to characterize all membranes. It could be found that nanocomposite membranes have better hydrophilicity and water flux than the original membrane. Therefore, the anti-fouling performance of the modified membranes had also been improved. Flux recovery rate (FRR) of the fabricated PSF/CDs membrane is higher than 90%, total fouling ratio (Rt) is less than 60%, and the reversible fouling played a dominant role during the fouling process. When the CDs content (mass fraction) is 2%, the overall effect of the membrane is the best with comprehensive performances such as separation efficiency, separation effect, and antifouling ability etc. The water flux of the nanocomposite membranes with stronger anti-fouling ability is even 3 times that of the plain PSF membrane.
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Received: 24 February 2020
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Fund: National Natural Science Foundation of China(51603214);Ningbo Science and Technology Bureau(2018A610110);“One Hundred Talented People”of the Chinese Academy of Sciences(Y60707WR04) |
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