Synthesis of well-defined cross-linkable zwitterionic macromolecular building blocks for hydrogels

Preparation and characterization of polyzwitterionic hydrogel coated polyamide‐based mixed matrix membrane for heavy metal ions removal

“…These indicated that COF with main functional groups were successfully synthesized. [37] Bands related to imine bonds, that is, the C=N stretching vibration at 1600 cm −1 , are not observed in the FTIR spectra. A [13] C solid-state NMR analysis was also performed to further determine the COF chemical structure and the result can be seen in Figure 4b.…”

“…A description of the development of the materials and methods for this new reactive coating approach has been recently presented by Duong et al [26] and Daumann et al. [37] The feasibility of hydrogel coating on MMM surface by utilizing concentration polarization to trigger the cross-linking reaction is reported here for the first time. The membrane performance was evaluated in terms of pure water permeability, rejection of various salts and heavy metal ions, and the results have been attributed to structural changes and variations in the properties of the membranes by integration of COF filler as well as polyzwitterionic coating.…”

Concentration Polarization Enabled Reactive Coating of Nanofiltration Membranes with Zwitterionic Hydrogel

“…The strategy for synthesis of the cross-linkable polyzwitterionic building blocks was adapted from previous own work; the copolymer P(SBMA-co-HEMA) had been established as one of various polyzwitterions that can be cross-linked via “click” reactions with commercial low-molecular weight reagents, specifically with a bis-epoxide for the nucleophilic hydroxyl side groups in P(SBMA-co-HEMA) [ 22 ]. In the current work, a straightforward acylation of the hydroxyl groups of the HEMA segments was used to introduce reactive methacrylate units.…”

“…Besides that, such three-dimensional networks have also been shown to reduce the foulant’s attachment to the underlying surface by a size-exclusion mechanism [ 19 ]. Thus, some of the recent membrane post-modification methods aim at combining the hydrogel’s and polyzwitterion’s advantages in novel surface coatings [ 15 , 20 , 21 , 22 ]. Nevertheless, facile, controllable, and scalable implementation methods for commercial membranes are not very well established [ 23 ].…”

Sternpolymere als funktionale Bausteine für neuartige Nanofiltrationsmembranen

“…Einfache Variationen von Struktur, Funktionalität und Architektur solcher Bausteine sind z. B. durch Copolymerisation von Poly(meth)acrylaten und weitere polymeranaloge Funktionalisierung möglich . Duong et al konnten einen solchen Baustein, ein zwitterionisches Poly(aminopropyldimethylaminoethylmethacrylat)‐ co ‐poly(sulfobetainmethacrylat) (PAPDMAEMA‐ co ‐PSBMA), das primäre Amino‐Gruppen enthält, parallel zu den eingesetzten Monomeren als Amino‐Komponente an der Polyamid‐Bildungsreaktion beteiligen und so während der Grenzphasenpolymerisation in die Trennschicht einbauen.…”