Zwitterionic sulfobetaine-grafted poly(vinylidene fluoride) membrane surface with stably anti-protein-fouling performance via a two-step surface polymerization

Zwitterionic copolymer self-assembly for fouling resistant, high flux membranes with size-based small molecule selectivity

“…They have been shown to be highly resistant to biomolecular fouling due to their high degree of hydration [32][33][34][35][36][37]. Since this discovery, many researchers have improved the fouling resistance of membranes by attaching zwitterionic groups on their surface, by post-processing existing membranes [38][39][40][41][42][43][44] or by using zwitterionic surface-segregating additives [45][46][47]. Two studies incorporated zwitterionic groups in charged hydrogel layers to boost fouling resistance [48,49].…”

A novel ultrafiltration (UF) membrane with controllable selectivity for protein separation

“…The PSB chains usually stretched from the membrane surface rather than entered into the membrane subsurface or the inner pores by such modification methods [20][21][22]25,26]. It is unfavorable to vary the membrane pore size and sieving/selectivity performance considerably, for example, from MF to UF.…”

“…Sulfobetaine (SB) and its polymer (PSB) have been used to functionalize porous membranes due to the strong hydration and environment sensitivity [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29]. Yang et al prepared antibiofouling polypropylene MF membrane by the surface hydrophilization with PSB [13].…”

Polycation‐Grafted Poly(vinylidene fluoride) Membrane with Biofouling Resistance

“…There are two major factors determining the decreasing rate of contact angle, i.e., the hydrophilicity and the porosity of the membrane surface [28]. The porous surface could accelerate the penetration of a water droplet into the membrane matrix [29]. In the present work, as the pores near the membrane surface are clogged by the polycations, the fast decreasing rate of the water contact angle is ascribed to the surface hydrophilicity induced by the hydration of polycations.…”