Construction Of Hypercrosslinked Polymers For Adsorption Of Rare And Rare Earth Elements

As an important branch of Porous Organic polymers(POPs),Hypercrosslinked Polumers,(HCPs)has attracted extensive attention in the field of materials due to its simple and universal preparation method,which can control the network and pore structure by adjusting the monomer crosslinking agent.Besides,the advantages of low reagent cost,simple post-treatment and high yield also made HCPs popular in fields of advanced material.In the synthesis of HCPs,the system contain a highly rigid network framework,which prevents the tight shrinkage of the polymer chain,so there are spatial gaps between the molecular chains,which is beneficial to formation of the pore structure.In recent years,HCP has become an important research topic in exploring new porous organic materials through the development of a variety of construction units and a variety of synthesis methods.This material has a wide application prospect and provides a new idea for solving energy and environmental problems.Therefore,in this work,a variety of HCPs was constructed and applied to the adsorption of scattered and rare earth ions.The specific investigation is divided into two parts:1.Ph-OH@HCPs were prepared by two hydroxyl-rich precursors of phenol monomer and poly(Styrene-co-Hydroxystyrene),respectively.The morphology and the adsorption capacity of the two Ph-OH@HCPs were tested by characterization analysis and adsorption progress of Ga.The results revealing that the Ph-OH@HCP-1 which synthesized by phenol monomer as precursor shows a better adsorption capacity of Ga due to its higher content of hydroxyl group in the precursors.The adsorption kinetics showed that the adsorption process is mainly a chem-adsorption.2.A series of styrene-based HCPs were synthesized by adjusting the proportion of styrene and GMA-IDA in the precursors,and further applied in the adsorption of rare earth elements.The adsorption behavior was analyzed by kinetic and thermodynamic experiments,and La³⁺,Nd³⁺,and Tm³⁺were selected are representative rare earth elements to test the selective adsorption progress.This is the first attempt that the copolymer precursors applied to the preparation of HCPs and adsorption of rare earth elements.