Equilibrium swelling properties of poly(N-vinylimidazole-co-sodium styrenesulfonate) hydrogels

pH-dependence of the swelling capacity of poly(N-vinylimidazole) hydrogels

“…[44] and denoted by w H , because they have a more general applicability than the experimental values and it allows to establish comparisons with other systems. [24,25] P mix is a positive contribution to swelling, small for PVI40(2) and a bit larger for PVI40(15) ( Table 2 and 3). The elastic contribution of the hydrogel deformed with respect to the reference or relaxed state (the network after synthesis and before swelling) is [27,28] …”

“…They regulate the pH of the bath in which they are immersed, [20,21] in ethanol they swell or collapse depending on the microstructure controlled by the composition of the feed [19] and they take up heavy metal ions [22,23] from aqueous solutions. Poly[(N-vinylimidazole)-co-(sodium styrenesulfonate)] hydrogels [24,25] have also several peculiar properties, for example, for some gel compositions dry discs swell up readily and then, spontaneously, they deswell and collapse.…”

Modeling Investigation of Hydrogel Volume Transition

“…[117] Peculiar to amphoteric hydrogels, anti-polyelectrolyte behavior is observed in poly-(N-vinylimidazole-co-sodium styrenesulfonate) hydrogels. [118] Their swelling ratio increases slightly upon increasing ionic strength of the aqueous salt solution. This is due to the reduction of intra-group and intra-chain aggregations of zwitterionic monomer units by the external electrolytes.…”

Functionalization of Poly(ether imide) Membranes via Surface-Initiated Atom-Transfer Radical Polymerization and their Use in Antifouling

“…PEGMA polymer (P(PEGMA)) is recognized as an effective modifier for preparing surfaces with protein antifouling [17]. NaStS polymer (P(NaStS)) as an amphiphilic polyelectrolyte exhibits electrolyte-responsive behavior [24]. For surface-initiated ATRP, the initiator concentration on a surface is relatively low, compared with that in bulk or solution ATRP.…”