Highly hydrophilic and low-protein-fouling polypropylene membrane prepared by surface modification with sulfobetaine-based zwitterionic polymer through a combined surface polymerization method

Surface zwitterionization of hemocompatible poly(lactic acid) membranes for hemodiafiltration

“…Platelet adhesion 80 μl platelet-rich plasma (PRP, 37 1C) was dropped onto each membrane surface and incubated at 37 1C for 1 h. After gentle rinsing with PBS buffer solution (pH 7.4), the membrane samples were treated with 2.5 wt% glutaraldehyde solution for 1 h. Then the samples were washed with ultrapure water and subjected to gradually dehydrated using ethanol/water solutions (10,30,50,70,90, and 100 wt%) in sequence. The morphologies of adhering platelets on the drying samples were observed with field emitting scanning electronic microscopy (SEM).…”

“…Among them, polyethylene glycol (PEG) and polyethylene oxide (PEO) are the most extensively studied and applied [28]. However, they are subjected to oxidative degradation and chain cleavage in the presence of oxygen and transition metal ions [29,30].…”

Tribological investigation into achieving skin-friendly artificial turf surfaces

“…The skinfriendly samples used in the experiments were polypropylene (PP) substrates modified with hydrophilic sulfobetaine methacrylate polymer (pSBMA) brushes. Zwitterionic pSBMA is known for its antifouling properties capable of resisting the surface adsorption of pathogenic bacteria [21,22] and is superhydrophilic which provides hydration lubrication [23,24] that reduces skin-sample friction. The study involves the use of skin-equivalent L7350 silicone [25] and commonly used standard AISI 440 stainless steel (SS) as tribotips to investigate the frictional properties of the modified samples and polypropylene controls.…”

NOM fouling behavior during ultrafiltration: Effect of membrane hydrophilicity

“…It is generally accepted that improving the intrinsic hydrophobic character of membranes is the most common method to avoid the non-specific adsorption between membrane and solute. Several hydrophilic materials were used to enhance antifouling ability of the conventional hydrophobic membranes, including PEO-like polymers [10][11][12][13][14][15][16][17][18][19][20][21][22], zwitterionic polymer [23][24][25], phospholipid polymer [26,27], heparin [28,29], zirconium oxide [30], titanium oxide [31], zeolite [32], silica [33], carbon nanotubes [34], graphene oxide [35], and their mixture [36]. Among these materials, PEO-like polymers have attracted much attention due to their superior antifouling ability [37].…”