| In this work, porous monolith which had unique open cell structure was prepared by concentrated emulsion polymerization method. This open cell structure could afford efficient support for further interfacial functionalized. And then research the adsorption behaviors of obtained functionalized porous monolith. The composition and pore structure were described. In order to investigate adsorption process, all batch adsorption experiments were carried out. The relations between interfacial function groups and pollutant had been explored. And adsorption behaviors were studied to reveal the adsorption mechanism. The details were as follows:The poly (glycidyl methacrylate) (PGMA) porous monolith which had unique open cell structure was prepared by concentrated emulsion templating. The porous monolith prepared by 30% surfactant concentration showed broad and even pore size distribution, and it would be beneficial to interfacial functionalized PGMA and increase further adsorption capacity of copper ions. And then polyacrylic acid (PAA) was grafted onto the interface of porous monolith by the reaction between carboxyl groups and epoxy groups. The large amounts of the carboxyl groups were introduced and these active binding sites could be benefiting to the rapid contacting with copper ions. As a result, adsorption capacities increased when pH of solutions increased and adsorption process was highly concentration-dependent. The addition of common co-existing ions had no appreciable effects on the adsorption capacity, the fast adsorption kinetics were obtained, and could maintain stabilities after desorption cycles.The carboxylic acid functionalized PGMA porous material was prepared and developed as porous adsorbent for simultaneous removal of copper ions and phenol in aqueous solution. The adsorption capacities of copper ions and phenol were 37.5mg·g-1 and 36.2mg·g-1 in their mixed solution, separately. Compared with their adsorption capacities in individual pure solution, it was found that there was no obvious difference on the adsorption behavior of copper ions in mixed solution. What’s exciting result was that the adsorption capacity of phenol in mixed solution was improved dramatically. The adsorption mechanism of phenol at the presence of copper ions was identified by the investigation of the effect of pH value and the relative content copper ions on the capacity. Furthermore, the oxygen and copper elemental before and after adsorption in pure and mixed solution were analyzed by X-ray photoelectron spectroscopy in detail. It could be deduced that copper ions in mixed solution were firstly absorbed at the interface of porous monolith and then the ions-enrichment interface layer was benefit for the phenol adsorption. In addition, the adsorption isotherms and kinetics of phenol adsorption were studied, and it was further indicated that the copper ions played important role in improving phenol adsorption capacity.This work focused on developing adsorbent for CO2 capture from high-humidity flue gas by loading moisture-responsive polyethylenimine (PEI) hydrogel on porous polymer matrix as interface layer. The chemical structure and porous morphology of the porous adsorbents were characterized. The CO2 adsorption capacity was evaluated. Factors that affected the adsorption capacity of the adsorbent including molecular weight of PEI, loading weight, the degree of crosslinking, moisture and adsorption thermodynamics were studied. The experimental results showed that this polyamine hydrogel loaded porous polymer could exhibit much higher adsorption capacity for CO2 and keep the high CO2-N2 selectivity by effective utilization of moisture (%RH=80%). The CO2 adsorption capacity as high as 4.85mmol CO2/g of adsorbent was obtained at 40℃. In order to illustrate the adsorption process of PEI hydrogel-PGMA porous monolith at the existence of moisture, a double-exponential model (DEM) was applied to describe. And then the formation of three-dimensional crosslinked network in hydrogel showed good regeneration stability.An nitrogen-doped porous carbon materials had been prepared through direct carbonization of melamine-resorcinol-formaldehyde porous resin that was obtained by concentrated emulsion templating, and then used for CO2 capture. The effects of melamine contents and volume fractions of internal phase on porous morphology were investigated. It was demonstrated that the obtained nitrogen-doped porous carbons with 90% volume fractions of internal phase had excellent unique open cell structure. Then the effects of various factors on adsorption capabilities were studied such as different carbonization temperatures and melamine contents. As a result, the CO2 adsorption capacity was 3.32mmol·g-1 at 0℃ and 1bar. The presence of nitrogenous groups in the resulting materials significantly improved the CO2 adsorption capacity of porous carbon. It also showed good CO2-N2 selectivity and regeneration stability. |
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