Cyclomatrix polyphosphazene organic solvent nanofiltration membranes

Hybrid Ceramic Nanofiltration Membranes Prepared by Impregnation and Solid-State Grafting of Organo-Phosphonic Acids

“…10, GM150 features a high potential interest for the applications in the NF range because of the excellent dye retention of 84% for RB (459 Da), and 94% for BY (624 Da). As expected, the dye retentions of the PEG-grafted membrane have increased substantially compared to pristine ultrafiltration γ-alumina membrane support with RB and BY retention of 14% and 76%, respectively [39]. Both dye molecules are electrostatically charged in water media, however, it is assumed that the increased retention observed for BY results mainly from a dominant size-exclusion separation mechanism as recently reported for PSf-b-PEG membranes [40].…”

“…In this work, we have shown for the first time the preparation of PEGgrafted mesoporous γ-alumina membranes (Ø pore ≈ 3.7 nm) for nanofiltration application via a vacuum impregnation of concentrated PEG oligomer solutions followed by a solid-state grafting. FTIR and 31 P solid- S8) [12,13,37,39,41,42]. The membranes used in this figure are similar in terms of the support or the membrane layer used (γ-alumina).…”

“…It must be noted that higher retentions were reported for cross-linked organic networks made of polyimide and polyphosphazene with similar alumina supports. Such results could be possibly attributed to the more narrow pore size distribution in comparison with the PEG-grafted membranes [37,39].…”

Progress in the Field of Cyclophosphazenes: Preparation, Properties, and Applications

“…The coordinating polymeric compounds, {[Mn(L)(Cl) 2 (H 2 O)]·(CH 3 ) 2 CO)} n ( 31 ), {[Co(L)(Cl) 2 ]} n ( 32 ), and {[Zn(L)(Cl) 2 ]} n ( 33 ), were also reported by the same group [ 23 ] and came from the self-assembly processes of the ligand (L) ( Scheme 21 ). By using thermal analyses (TGA), XRD, SCXRD, and elemental analysis, including FTIR, the structural composition of every crystalline molecule was identified.…”

“…Several synthetic approaches have been devised for the preparation of cyclotriphosphazene, involving the chemical modification of cyclotriphosphazenes through reactive functional groups [ 1 ]. These strategies yield prepolymers with versatile applications, including but not limited to coatings, adhesives, composites, anticancer medications [ 2 , 3 ], tumor growth inhibitors, flame retardants [ 4 , 5 , 6 ], biologically active molecules [ 7 , 8 , 9 ], antimicrobial reagents [ 10 ], organic light emitting diodes [ 10 , 11 , 12 ], catalysis [ 13 , 14 ], fluorescent dyes [ 15 , 16 , 17 ], polymerization [ 18 , 19 , 20 , 21 , 22 ], gas separation membranes [ 23 ], medicinal chemistry [ 24 ], lubricant additives [ 25 ], and inorganic chemistry [ 1 , 26 ].…”