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High performance liquid chromatogarphy (HPLC) is one of the major
techniques in separation sciences. Faster separation and higher
efficiency are required to meet ever-growing demands. Despite
numerous efforts on improving mass transfer in particulate packings
discontinuity seems to be the cornerstone. Macroporous continuous
beds or monoliths are, therefore, a promising alternative to the
particle medium. The work deals with the preparation of new
monoliths used as support for HPLC stationary phase. Two different
approaches were developed: one based on the polycondensation of
epoxy resins which were dispersed in aqueous polyamine phase with
the aid of a surfactant. The other involved a traverse of linear
polyamides solutions around their upper critical solution
temperatures (UCST). The polymers, dissolved in a solvent at
temperatures higher than their UCSTs followed by slow cooling to
below these temperatures to precipitate the polymers. Partly
re-established hydrogen bonds resulted in the formation of
crystallites that interconnected into a network structure. The
study also deals with surface modifying for chromatographic
applications.
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