摘要
Abstract
γ-Chloropropyltriethoxysilane served as the coupling agent,four generations of dendritic polyamidoamine(PAMAM),namely MSF-G1.0～G4.0,were successfully grafted onto the surface of mono-dispersed mesocellular siliceous foam(MSF)microspheres via a straightforward two-step reaction process.Fourier transform infrared spectroscopy,thermogravimetric analysis,and scanning electron microscopy were strategically utilized to comprehensively characterize the chemical structures,compositions,and morphologies of the modified MSFs.It was demonstrated that,owing to the coupling action of the coupling agent,the amine-rich polymer could be effectively grafted onto the surface of MSF under relatively gentle reaction conditions.By synergistically integrating the remarkable porous architecture of MSF substrate and the abundant functional groups inherent in dendritic PAMAM,the modified MSFs manifested substantial adsorption capacities accompanied with rapid adsorption equilibrium rates towards lead(Ⅱ)in the aqueous solution.The adsorption capacity was found to span from 46.71 to 105.77 mg/g,and the equilibrium time was determined to be within the range of 60 to 120 min.关键词
介孔硅泡沫/树形聚酰胺胺/"接枝到"法/吸附/铅离子Key words
mesocellular siliceous foam/dendritic polyamidoamine/graft onto method/adsorption/lead(Ⅱ)分类
化学化工
