Hydrogel assisted interfacial polymerization for advanced nanofiltration membranes

Abstract

This study demonstrates the application of a hydrogel as the aqueous phase in interfacial polymerization for the synthesis of a thin film composite membrane with ultrahigh permeability.

Super-assembly of freestanding graphene oxide-aramid fiber membrane with T-mode subnanochannels for sensitive ion transport

“…The obtained GO/ANF/GO composite membrane exhibited an excellent mechanical performance due to the super-assembly interaction between GO and ANF, which increased the mechanical stiffness and strength of the membrane. 28,41–43 Therefore, GO/ANF/GO exhibited excellent stability in water and remained intact for 15 days even under strong acidic and alkaline solutions (Fig. S4†).…”

Nanofiltration for Arsenic Removal: Challenges, Recent Developments, and Perspectives

“…Wang et al, reported a simple elegant method for the fabrication of an efficient TFC-NF membrane with a crumpled polyamide (PA) layer via IF on a single-walled carbon nanotubes/polyether sulfone composite support membrane loaded with sacrificial nanoparticles [ 179 ]. Recently, a novel approach to design TFC membranes with ultrahigh permeance using hydrogel assisted IF has been advanced, which is facile, and enables cost-efficient and scalable manufacturing [ 180 ].…”

Alginate Hydrogel Assisted Controllable Interfacial Polymerization for High-Performance Nanofiltration Membranes

“…The separation performance for different types of mono/divalent salts is basically in line with the characteristics of nanofiltration (Figure 6c), which exhibits a rejection order: Na 2 SO 4 (97.2%) > MgSO 4 (82.7%) > CaCl 2 (15.8%) ≈ NaCl (15.2%). It also has certain advantages in breaking the trade-off effect compared with other high-performance nanofiltration membranes recently reported in the literature [14,19,24,27,28,[32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48]. The collected water permeance and water/Na 2 SO 4 permselectivity A/B are shown in Figure 6d and Table 2.…”

“…The established calcium alginate hydrogel layer can provide a stable platform to implement interfacial polymerization as well as store PIP monomers and release them controllably [18,31]. The non-fluidity property and restriction effect of the alginate hydrogel on amine monomers can significantly reduce the diffusion rate of PIP monomers resulting in thinner polyamide nanofilms than those prepared by conventional interfacial polymerization [32]. The as-prepared TFC membranes exhibit high water permeance (~30 Lm −2 h −1 bar −1 ) and comparable rejection of Na 2 SO 4 (>97%) with the assisted alginate hydrogel reaction intermediate layer.…”