Design of a novel poly(aryl ether nitrile)-based composite ultrafiltration membrane with improved permeability and antifouling performance using zwitterionic modified nano-silica

Abstract

Zwitterionic nano-silica (SiO2 NPs) obtained by lysine surface modification was used as a hydrophilic inorganic filler for preparing a poly(aryl ether nitrile) (PEN) nanocomposite membrane via an immersion precipitation phase inversion method.

Role of Surface Energy of Nanoparticle Stabilizers in the Synthesis of Microspheres via Pickering Emulsion Polymerization

“…The application potential of Pickering emulsions technology in manufacturing nano and microstructures can be greatly expanded by combining it with complementary methods; for example, micron sized hollow spheres decorated with catalyst nanoparticles could be obtained [ 27 ] from combining Pickering emulsification with non-solvent induced phase separation (NIPS) method. NIPS is a widely used method for fabrication of polymeric membranes and microspheres [ 28 , 29 , 30 ]. Another particularly attractive aspect related to Pickering emulsions is the possibility to polymerize them, when the oil phase is a water immiscible vinyl bearing monomer; this way a plethora of new polymeric nano- and micromaterials can be obtained, including molecular imprinted polymers [ 6 , 22 , 31 ], colloidal particles with structural complexity [ 32 ], conductive nanostructured microcapsules [ 33 ], organic-inorganic composite particles [ 34 ], etc.…”

Preparation and Characterization of Reduced Graphene Oxide /TiO2 Blended Polyphenylene sulfone Antifouling Composite Membrane With Improved Photocatalytic Degradation Performance

“…The preparation of hybrid PPSU ultrafiltration membranes by solution casting and the non-solvent induced phase-separation method were based on previous study with a slight modification ( Wang et al, 2021 ). Briefly, the casting solution, consisting of PPSU, the rGO/TiO 2 nanocomposites, PVP K30 (used as the porogen) and NMP (used as the solvent), were prepared under ultrasonication to obtain a homogeneous mixture, and then the mixture was further mechanical stirred at 300 rpm for 12 h. After bubble removal for 30 min, the casting solution was poured onto a clean glass plate with a scraper of 150 μm and immediately transferred to a water coagulation bath at 25°C until the membrane peeled off.…”

Morphological effects of sphericalSiO2and hexagonal mesoporousMCM‐41 nanoparticles in polyacrylonitrile mixed matrix membranes on the biofouling mitigation in short‐term filtration

“…Moreover, due to the sensitive nature of the BSA molecule and its surface charge changes at different pH, fabrication and filtration of BSA solution were performed at neutral pH. The isoelectric point for BSA protein, PAN, SiO 2 , and MCM-41 NP is negative at pHs above 7, [50][51][52][53] which causes an electrostatic repulsion force that is enhanced by increasing the NP content to the optimal amount; this force is intensified and leads to a reduction of membrane fouling in the filtration process. 27,51 For evaluating the effects of silica NP morphology on the antifouling performance of the MMM, the BSA solution was used as a protein model foulant.…”