1. Microwave heating assistant preparation of high permselectivity polypiperazine-amide nanofiltration membrane during the interfacial polymerization process with low monomer concentration.
- Author
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Huang, Ben-Qing, Tang, Yong-Jian, Zeng, Zuo-Xiang, and Xu, Zhen-Liang
- Subjects
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NANOFILTRATION , *MICROWAVE heating , *MICROWAVES , *MONOMERS , *COMPOSITE membranes (Chemistry) , *POLYMERIZATION - Abstract
By causing the water molecule vibration to generate heat, microwave has become a rapid and efficient heating method which is widely used in industrial production. Herein, microwave heating assistant interfacial polymerization (IP) process was innovatively applied to fabricate polypiperazine-amide nanofiltration (NF) membrane for the first time. With microwave heating, a uniform and faultless polyamide (PA) layer could be generated with low monomer concentration. The pure water flux (PWF) of the NF membrane fabricated with microwave heating was 157.1 L m-2 h-1 with the Na 2 SO 4 rejection of 97.7% under 0.6 MPa. Meanwhile, such NF membrane showed extraordinary selectivity to Cl- and SO 4 2− for a series of mixing solution with different concentrations. This new insight into microwave heating assistant IP provides a feasible method for the high-permselectivity NF membranes fabrication. Image 1 • The microwave heating was applied for the IP process to fabricate TFC NF membrane for the first time. • The uniform and faultless PA layer could be generated with low monomer concentration with microwave heating. • The NF membrane showed good permeability and rejection and high selectivity to Cl- and SO 4 2−. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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