Synthesis and association properties in water solution of random copolymers of 2‐acrylamido‐2‐methyl‐1‐propane sulfonic acid and isodecyl methacrylate—potential application as surfactants in micellar‐enhanced ultrafiltration processes

Abstract

: Synthesis and association properties in water solution of random copolymers of 2-acrylamido-2-methyl-1-propane sulfonic acid and isodecyl methacrylate-potential application as surfactants in micellar-enhanced ultrafiltration processes. Fluorescence spectroscopy was used to further confirm the copolymers self-aggregate in water. Critical concentration of the self-aggregate formation (CAC) decreased by increasing the molar fraction of iDMA in the AMPS co copolymers and varied between 1.20 and 0.04 g/L depending on the degree of hydrophobic modification. Hence, copolymer composition and charge density allowed tuning the pseudomicellar characteristics of these new amphiphilic copolymers. The addition of a salt or a low-molecular-weight surfactant was studied. Binding of CTAB to the AMPS co copolymers leads to a high decrease of CAC, i.e., 0.006 g/L. Effect of the composition in the viscosimetric behavior of the hydrophobically modified copolymers AMPS co was investigated. The removal of single metal ions, Cu 21 , and m-cresol from aqueous solutions by ultrafiltration with the help of the copolymers was investigated. Equilibrium dialysis experiments demonstrate that the formation of hydrophobic microdomains can be used to control the sequestration of foulants, and thus these novel copolymers have potential application as polymeric surfactants in micellar-enhanced ultrafiltration processes for water purification. Journal of Applied Polymer

Self-assembly of physically crosslinked micelles of poly(2-acrylamido-2-methyl-1-propane sulphonic acid-co-isodecyl methacrylate)-copper(II) complexes

“…All the synthesized copolymers showed a single glass transition temperature which indicated the formation of random copolymers. T g values were higher than that reported [15] for the homopolymer poly(AMPS) (124°C). The relatively high T g in the random copolymers are due to the amide and sulphonic groups attached to the backbone of the polymers facilitating entanglement of the polymer chains.…”

“…The synthesis of the copolymers has been described elsewhere [15]. The comonomers (total monomer concentration, 1 mol/L), 2-acrylamido-2-methylpropane sulphonic acid and isodecyl methacrylate, were copolymerized at 70°C ± 0.1°C under N 2 atmosphere using AIBN (0.3 wt.%) in purified N,N 0 -dimethylformamide as solvent.…”

“…The preparation of hydrophobically modified polyelectrolyte by radical copolymerization of 2-acrylamido-2-methylpropane sulphonic acid, AMPS, and isodecyl methacrylate, i-DMA, under nitrogen at 70°C using azo-bis-isobutyronitrile (AIBN) as initiator in N,N 0 -dimethylformamide (DMF) as solvent was achieved as previously described [15]. Feed composition was changed to obtain copolymers with different hydrophobic content.…”

“…We used several fluorescent probes, ICT (Intramolecular Charge Transfer) and organic salts, to determine the minimum micellar concentration of the random copolymers in a previous work [15]. In this study, a NBD amino derivative was selected as extrinsic fluorescent probe for studying the associative behaviour of the amphiphiles AMPS Co and their metal complexes in water.…”

“…This paper is a continuation of the previous work concentrating on preparing hydrophobically modified polyelectrolytes by radical copolymerization of 2-acrylamido-2-methylpropane sulphonic acid, AMPS, and isodecyl methacrylate [15]. The removal of single metal ions and m-cresol from aqueous solutions in equilibrium dialysis experiments by means of the copolymers was investigated.…”