| 초록 |
We prepared the organic-inorganic hybrid materials with hierarchical macro/mesostructure using amine-coated mesoporous silica nanoparticle (MSN-NH2) and polyethylenimine (PEI) supported by 4,4’ –methylenebis(phenyl isocyanate) (MPI). In this study, MPI with di-isocyanate groups at the both ends acts as a linker to prepare 3 dimensional interconnected structure. Isocyanates are electrophiles which are reactive toward a variety of nucleophiles including alcohols and amines. Thus, reaction between a di-isocyanate and a compound containing two or more amine groups, produces long network polymer chains known as polyureas. Through TEM and FT-IR analysis, it is concluded that MPI is a good linker to prepare meso/macro network structure and the materials showed good performance in the adsorption of heavy metals. |
