Bio-inspired polydopamine nanofiltration membranes modulated by spiro-piperazine

Xufei Liu; Huawen Peng; Jing Lu; Yanli Ji; Shaoping Li; Jiayin Yuan; Qiang Zhao; Congjie Gao

Advanced Membranes (Jan 2023)

Bio-inspired polydopamine nanofiltration membranes modulated by spiro-piperazine

Xufei Liu,
Huawen Peng,
Jing Lu,
Yanli Ji,
Shaoping Li,
Jiayin Yuan,
Qiang Zhao,
Congjie Gao

Affiliations

Xufei Liu: Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
Huawen Peng: Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
Jing Lu: Key Laboratory of Textile Fiber and Products, Ministry of Education, Wuhan Textile University, Wuhan, 430200, China
Yanli Ji: Center for Membrane and Water Science & Technology, Zhejiang University of Technology, Hangzhou, 310014, China; Corresponding author.
Shaoping Li: Hubei Three Gorges Laboratory, Yichang, 443000, China
Jiayin Yuan: Department of Materials and Environmental Chemistry, Stockholm University, Stockholm, 10691, Sweden
Qiang Zhao: Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China; Corresponding author.
Congjie Gao: Center for Membrane and Water Science & Technology, Zhejiang University of Technology, Hangzhou, 310014, China

Journal volume & issue: Vol. 3
p. 100059

Abstract

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Polydopamine (PDA) depositions, inspired by mussel foot adhesive proteins, represent a versatile method for preparing separation membranes. However, PDA-based nanofiltration membranes are limited by the long preparation time and moderate flux. This work modulated PDA deposition processes with a spiro-piperazine (SPIP) molecule containing two secondary amine groups and a quaternary ammonium salt. The SPIP could be covalently inserted into PDA coating structures via Michael addition reaction to accelerate the deposition process of PDA and reduce its aggregation. In addition, the rigid and spiro configuration of SPIP molecules provides higher fractional free volume and leads to looser and more uniform structures in the PDA coating. As such, water permeance of PDA/SPIP membranes is 73 L m−2 h−1 bar−1, 4.6 times improved compared with PDA control membranes, while the dye rejection (>99% for Congo red) is maintained high. These results demonstrate that SPIP is an effective molecule for the structure and performance engineering of mussel-inspired PDA nanofiltration membranes.

Published in Advanced Membranes

ISSN: 2772-8234 (Online)
Publisher: KeAi Communications Co. Ltd.
Country of publisher: China
LCC subjects: Technology: Chemical technology: Chemical engineering
Website: https://www.keaipublishing.com/en/journals/advanced-membranes/

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