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Chemcial Industry and Engineering 2023, Vol. 40 Issue (3) :20-31    DOI: 10.13353/j.issn.1004.9533.20235001
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Preparation and performance of reverse osmosis membrane with amino-functionalized graphene oxide quantum dots interlayer
LIU Shaoxiao1, TAN Xiaoqian2, SU Baowei1
1. College of Chemistry & Chemical Engineering, Ocean University of China, Shandong Qingdao 266100, China;
2. The 404 Company Limited. China National Nuclear Corporation, Gansu Jiayuguan 735100, China

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Abstract In order to improve the separation performance of RO membranes, as well as overcome the poor dispersibility and stability of nanomaterials in RO membranes, in this work, the amino-functionalized graphene oxide quantum dots (af-GQDs) interlayer were constructed on the surface of polysulfone (PSf)/polyimide (PI) ultrafiltration membrane prepared via the phase inversion method. The af-GQDs interlayer was firmly bonded to the support membrane via the covalent bonding between amine groups of the af-GQDs and the PI contained in the support membrane. Meanwhile, the covalent bonding effectively improved the dispersion of af-GQDs on the surface of support membrane. Subsequently, a polyamide separation layer was constructed on the af-GQDs interlayer via the interfacial polymerization reaction between m-phenylenediamine (MPD) and trimesoyl chloride (TMC). In the process of interfacial polymerization, the af-GQDs interlayer could regulate the diffusion rate of aqueous phase monomer MPD into the interfacial polymerization reaction zone through hydrogen bonding, which could improve the separation performance of reverse osmosis (RO) membrane. The performance test results show that the best RO membrane (iTFC-10-0 RO) prepared under the optimal conditions have excellent water permeance of 20.9 L·m-2·h-1·MPa-1 and NaCl rejection of 98.9% for 2 000 mg·L-1 NaCl solution at 1.0 MPa. In addition, the iTFC-10-0 RO membrane possessed excellent anti-fouling performance and long-time filtration stability performance.
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LIU Shaoxiao
TAN Xiaoqian
SU Baowei
Keywordsamino-functionalized graphene oxide quantum dots   reverse osmosis   interlayer     
Received 2022-12-28;
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Corresponding Authors: 苏保卫,教授,E-mail:subaowei@ouc.edu.cn。     Email: subaowei@ouc.edu.cn
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LIU Shaoxiao, TAN Xiaoqian, SU Baowei.Preparation and performance of reverse osmosis membrane with amino-functionalized graphene oxide quantum dots interlayer[J]  Chemcial Industry and Engineering, 2023,V40(3): 20-31
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