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Separation and Purification Technology

Separation and Purification Technology

IF: 8.09
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Rapid synthesis of polyzwitterionic hydrogel via frontal polymerization towards seawater desalination

Published:5 December 2024 DOI: 10.1016/j.seppur.2024.130965
Ya-Lan Zhao, Yin Li, Rong Chen, Liangliang Zhu, Guo-Xing Li, Hai-Xia Shen, Qing Li, Su Chen

Abstract

The scarcity of freshwater has become a growing threat for human life, which sparks intense interests in hydrogel evaporator towards seawater desalination. Thus, methods allowing the rapid synthesis of high-performance hydrogel evaporator is highly desirable. In this work, we develop polyzwitterionic hydrogel by using zwitterionic monomer (2-Methacryloyloxy)ethyl]dimethyl-(3-sulfopropy, DMAPS) via frontal polymerization (FP) method, which is time- and energy-saving, allowing the preparation of hydrogels within several minutes. Meanwhile, the polyzwitterionic hydrogel shows higher swelling ratios and water evaporation performance than that prepared by common strategy. The polyzwitterionic hydrogel has anti-polyelectrolyte effects, showing electrostatic interaction between the anionic/cationic groups and salt ions, which is beneficial to the swelling capacity and evaporation performance in high salinity brines. Specially, by regulating the DMAPS content, a maximum seawater evaporation rate of 3.62?kg·m?2h?1 under simulated sunlight and a maximum seawater evaporation rate of 3.57?kg·m?2h?1 under natural sunlight are achieved, which holds great potentials in seawater desalination. This work proposes a polyzwitterionic hydrogel with high evaporation rate in seawater via a facile FP strategy, which enables the preparation of a variety of high-performance hydrogel evaporators in a rapid fashion.

Substances (6)

Materials
Procduct Name CAS Molecular Formula Supplier Price
Potassium chloride 7447-40-7 KCl 1313 suppliers $6.00-$11230.00
Sodium chloride 7647-14-5 ClNa 1216 suppliers $5.00-$6678.62
Sodium hydroxide 1310-73-2 NaOH 1212 suppliers $14.00-$16472.00
Ammonium persulfate 7727-54-0 H8N2O8S2 686 suppliers $13.98-$3100.00
Acrylamide 79-06-1 C3H5NO 666 suppliers $18.00-$1470.00
ETHYLENE-D4 GLYCOL 2219-51-4 C2H2D4O2 68 suppliers $55.00-$1121.80

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