The zwitterionic polyamidoxime hydrogel has a reverse polyelectrolyte effect. The gel swells in seawater and shrinks in pure water. It has good hydrophilicity to seawater, which is beneficial to the extraction of uranium from seawater.
Zwitterionic polyamidione hydrogel has antipolyelectrolyte effect. The gel expands in water and shrinks in pure water. It has better hydrophilicity to seawater and helps to extract uranium from seawater.
Amphoteric polyamidoxime hydrogel has anti-polyelectrolyte effect. The gel swells in seawater and shrinks in pure water, which is hydrophilic to seawater and beneficial to uranium extraction from seawater.