Solvent-resistant P84-based mixed matrix membrane adsorbers

Novel ultrafiltration membranes with adjustable charge density based on sulfonated poly(arylene ether sulfone) block copolymers and their tunable protein separation performance

“…The electrostatic repulsion between negatively charged BSA and negatively charged membrane surface became larger with increasing solution pH and BSA was more effectively excluded from the surface. The adsorbed amount of BSA on the all membranes was lower than, for instance, other porous membranes reported in the literature [49][50][51][52]. Due to the hydration layer screening of the hydrophobic membrane polymer and the electrostatic repulsion of membranes with protein at pH > pI of BSA, the here reported membranes have a good protein resistance ability, which is tunable by varying the fraction of S-PAES block copolymer.…”

Organic-Solvent-Resistant Polyimide/Hydroxyapatite Mixed Matrix Membranes for Lysozyme Adsorption

“…Figure 9 shows the LZ adsorption of MMMs in different organic-solvent-aqueous solutions. In the aqueous system, the adsorption is based on electrostatic interactions between the biomolecules and charged particles, whereas in the organic solvents, hydrophobic/hydrophilic interactions play a dominant role [7]. As shown in Figure 9, the adsorption property of MMMs was tested in three different organic-solvent-aqueous solutions, such as DMSO/H 2 O, DMF/H 2 O and NMP/H 2 O.…”

“…Additionally, MMMs provide a low pressure drop, high throughputs, a high efficiency, an easy scale-up, etc. The adsorption-based separation behavior involves the preferential participation of adsorbate molecules moving from the liquid phase onto the substrate surface [7]. Adsorptive MMMs incorporate adsorptive particles into the polymeric porous matrix where the interactions between enzymes or proteins and adsorptive particles happen.…”

In-situ preparation of poly(ether imide)/amino functionalized silica mixed matrix membranes for application in enzyme separation

“…Lewatit ion-exchange resins have been used to prepare MMMs for adsorption of BSA, bovine hemoglobin (Hb), and lysozyme (LZ) [34,35]. The crosslinked P84 MMMs containing cation exchange particles were prepared for adsorption of BSA and LZ [36]. Moreover many different inorganic particles such as titanium dioxide (TiO 2 ) [37], carbon nanotubes [38], silicon dioxide (SiO 2 ) [39], zinc oxide (ZnO) [40] and hydroxyapatite (HAP) [41] were dispersed in polymer matrix to prepare MMMs with microporous or macroporous structures.…”

“…The corrosion resistance, solvent resistance and temperature tolerance can be improved through crosslinking. P84 membrane was crosslinked with EDA and the solvent resistance property of the crosslinked membrane was enhanced [36]. The imide groups of PEI molecules can react with amino group of EDA, and PEI molecules are crosslinked, as shown in in Fig.…”