Quenched Polyampholyte Hydrogels Based on (3‐Acrylamidopropyl)trimethyl Ammonium Chloride and Sodium Salt of 2‐Acrylamido‐2‐methyl‐1‐Propanesulfonic Acid

Abstract

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.

Polarity of Cationic Lignin Polymers: Physicochemical Behavior in Aqueous Solutions and Suspensions

“…[7] The displayed band of NHÀ CO (amide group) at 1630 cm À 1 was also observed in the spectrum of HL-MAPTAC polymer. [42] Therefore, the appearance of new peaks for CHL polymers illustrated that the polymerization of lignin with METAC or MAPTAC was successfully achieved.…”

Behaviors of quenched polyampholytes in solution and gel state

“…It was shown that the equimolar PAMPS 82 ‐PAPTAC 83 precipitates in pure water due to the formation of intra‐polyelectrolyte complexes (intra‐PEC) between anionic and cationic blocks while PAMPS 82 ‐PAPTAC 37 and PAMPS 82 ‐PAPTAC 181 containing an excess of anionic and cationic blocks, respectively, are fully water‐soluble. It is supposed that the equal numbers of oppositely charged PAMPS and PAPTAC blocks are involved into formation of a “core,” while the excess of PAMPS and PAPTAC blocks are replaced in a “shell.” It is interesting to compare the behaviors of diblock PAMPS 82 ‐PAPTAC n copolymers with random QPA based on of AMPS m ‐ co ‐APTAC n in aqueous‐salt solutions, where m = 25, 50, and 75 mol%, n = 75, 50, and 25 mol% 46,47 . Equimolar or balanced QPA prepared by RAFT and FRP are insoluble in pure water but dissolved in saline water.…”

“…The complexation of charge unbalanced linear and cross‐linked AMPS 25 ‐ co ‐APTAC 75 and AMPS 75 ‐ co ‐APTAC 25 copolymers was studied in aqueous solutions of surfactants and ionic dyes 46 . Complexations of AMPS 25 ‐ co ‐APTAC 75 with the anionic surfactant sodium dodecylbenzenesulfonate (SDBS), and AMPS 75 ‐ co ‐APTAC 25 with the cationic surfactant cetyltrimethyl ammonium chloride (CTMAC) are accompanied by changes in turbidity, zeta‐potential and average hydrodynamic diameter of colloid particles.…”

“…Another specific property of QPA is the antipolyelectrolyte effect in response to salt addition 25‐27 . Charge‐balanced and charge‐unbalanced QPA consisting of a core (polyampholyte regime) and shell (polyelectrolyte regime) structure show antagonism in aqueous salt solutions 45,46 . Addition of low‐molecular‐weight salts tends to shrink the shell part and to swell the core part.…”

Oxidation of iso‐propanol and n‐butanol by catalase encapsulated within macroporous polyampholyte cryogel matrix

“…Last year, the present research group focused on quenched, or strongly charged, polyampholytes, based on anionic, AMPS, and cationic, APTAC, monomers, which retain their respective charges independent of pH 15 . The behavior of such polyampholytes in solution 16 and gel state was studied, 17,18 inclusive of their complexation ability with respect to surfactants, dyes and proteins 18,19 . Moreover, they were tested as viscosifying 20 and tracer 21 agents in oil recovery and monitoring well‐to‐well connections.…”