Poly(sodium vinylsulfonate)/chitosan membranes with sulfonate ionic cross-linking and free sulfate groups: preparation and application in alcohol dehydration

Recent developments in polymeric nano-based separation membranes

“…In addition, tuneable PECN nano-building blocks were also adopted for the fabrication of various PECN membranes to realize both hydrophilic and hydrophobic properties [60] , [61] , [62] , [63] . According to quantum chemical calculations, the hydration capacity between hydrophilic groups and water molecules follows the order of sulfonic acid group > carboxylic group > quaternary ammonium group > hydroxyl ≈ amino group.…”

“…Sulfated PECNs and their membranes have the strongest hydrophilicity ( Fig. 8 ), and the PECN membranes could effectively overcome the "trade-off" phenomenon in the process of PV dehydration [ 60 , 61 ]. In contrast, the hydrophobicity of PECNs and their membranes could be enhanced by introducing hydrophobic surfactants and long alkyl chains [ 62 , 63 ].…”

Sulfonate-modified phenylboronic acid-rich nanoparticles as a novel mucoadhesive drug delivery system for vaginal administration of protein therapeutics: improved stability, mucin-dependent release and effective intravaginal placement

“…The absorption peaks at 1,068 cm −1 and 1,194 cm −1 in the FT-IR spectrum of PBNP-S5 and PBNP-S10 may be assigned to the stretching vibration of the sulfonate group ( Figure S1). 24 Improved stability of PBNP-S over PBNP Tendency of aggregation was used to limit the practical application of PBNPs, which not only significantly aggregated at neutral pH ( Figure 2B) but also became bigger and bigger during storage at all tested pH values from 4 to 9 ( Figure 3). And that is the main reason why sulfated monomers were introduced into the composition of PBNPs.…”