A method for modification of polypropylene hollow fibers using graft copolymerization of polymethylmethacrylate (PMMA) was developed. The unsaturated residues in polypropylene were reacted with borane-dimethylsulfide, and PMMA was graft polymerized on the surface to form a stable coating which reduced the electroosmotic flow and the adsorption of biomolecules. The PMMA modified polypropylene exhibited a lower EOF than fused silica and polypropylene, close to that of bulk PMMA. Samples of nucleotides and pyridines were used to demonstrate the performance of the modified columns. Approximately 100,000 theoretical plates were obtained for lysozyme variants.
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Qi et al. (1998) studied this question.
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