Preparation of modified hollow polypropylene membrane and their adsorption properties of γ-globulins

The hydrophobic ligand-containing hollow polypropylene (PP) membranes were synthesized by the mutual radiation induced graft copolymerization with glycidylmethacrylate (GMA) onto hollow PP membrane followed by the subsequent functionalization with L-phenylalanine. FT-IR, elemental analysis and UV spectroscopy were utilized to characterize copolymer composition, and degree of grafting, functionalization conversion and gamma-globulins adsorption. The degree of grafting on the PP surface increased with the reaction time and total dose of E-beam. In the subsquent functionalization, the amount of L-phenylalanine increased with the increase in the degree of grafting and the degree of conversion was about 30%. The gamma-globulins adsorption experiments showed that adsorption capacity had a maximum value at pH 8. The gamma-globulins adsorption capacity in the basic pH region was higher than in the acidic pH region.