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A series of polyampholyte hydrogels (PAHs) based on fully charged cationic monomer (3‐acrylamidopropyl) trimethylammonium chloride (APTAC) and anionic monomer sodium salt of 2‐acrylamido‐2‐methyl‐1‐propanesulfonic acid (AMPSNa) were synthesized by free radical copolymerization in the presence of N,N‐methylenebisacrylamide (MBAA) as a crosslinking agent. The functional groups and composition of copolymers were identified by FTIR and 1H NMR spectra. The dynamic swelling properties of PAHs were studied in aqueous‐salt solutions. The swelling behavior regardless of hydrogel composition, followed Fickian diffusion. The adsorption and desorption ability of PAHs was evaluated with respect to ionic dyes and surfactants.

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