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Abstract
To improve the surface blood compatibility of polysulfone (PSf) membranes, we prepared
novel polymeric additives which have suitable blood compatibility. They were polymers
with a phosphorylcholine group, a 2-methacryloyloxyethyl phosphorylcholine (MPC) unit.
The MPC polymer could be blended with polysulfone by a solvent evaporation method
during membrane processing, and a transparent membrane could be obtained. The mechanical
properties of the blend membrane were similar to that of the original PSf membrane.
Surface analysis of the blend membrane by X-ray photoelectron spectroscopy and dynamic
contact angle measurement revealed that the MPC unit in the polymeric additive was
concentrated on the surface of the membrane. The blend membrane significantly reduced
plasma protein adsorption compared with that of the PSf membrane.