Preparation Of Poly C12Monolith And Its Application In The Separation Of Benzene Series

In recent years, monolithic column as the stationary phase of high performance liquidchromatography (HPLC), has attracted increasing attention because of its excellent masstransfer properties and versatile surface modification compared to conventional columnspacked with particles. Redox initiator can fast occur under contact pressure and ambienttemperature condition, and shorten the initiation time. In this dissertation, redox initiator wasused to initiate the free radical polymerization to prepare the polymeric monolith.Firstly, polymeric monolithic column was prepared through redox initiator. At ambienttemperature,1-dodecene as the monomer, vinyl ester resin as the crosslinking agent,dodecanol as the porogen, benzoyl, peroxide and N, N-dimethyl aniline were used as initiators.Monolith with skeleton structure was obtained. The characters of the monolith wereinvestigated by scanning electron microscopy (SEM) and mercury porosimeter. The preparedmonolith was used as the stationary phase of HPLC to separate benzene series. The monolithhad high performance in separation of small molecule compounds which was high to104plates m-1. The results showed the monolith was the typical reversed phase chromatography.Secondly, with the same initiator to the above,1-Dodecene (C12) was used as the monomer,ethyleneglycol dimethacrylate as the crosslinking agent and cetanol as the porogen. At roomtemperature, monolith with skeleton structure was obtained. The characters of the monolithwere investigated by SEM, fourier transform infrared spectroscopy, mercury porosimeter andnitrogen adsorption-desorption mercury porosimetry. Moreover, the prepared monolith wasused as the stationary phase of HPLC to separate the small molecule compounds of benzenes.High column efficiencies in excess of11,000theoretical plates per meter were obtained.