介孔硅泡沫接枝树形聚酰胺胺的制备及吸附铅(Ⅱ)OA
Preparation and Lead(Ⅱ)Adsorption of Mesocellular Siliceous Foam Grafted with Dendritic Polyamidoamine
以γ-氯丙基三乙氧基硅烷为偶联剂,采用"接枝到"(graft onto)法,经过两步反应将四种代数的树形聚酰胺胺接枝在单分散的介孔硅泡沫微球表面进行改性,得到MSF-G1.0～G4.0.通过傅里叶红外光谱、热重分析和扫描电子显微镜对改性介孔硅泡沫的化学结构、组成和形貌进行了表征,结果表明通过偶联剂的偶联作用可以在较温和的条件下将多胺聚合物接枝在介孔硅泡沫表面.综合介孔硅泡沫基材优异的多孔结构与树形聚酰胺胺丰富的功能基团,改性介孔硅泡沫对溶液中的铅离子具有较大的吸附容量和较快的吸附平衡速率,吸附量为46.71～105.77 mg/g,平衡时间为 60～120 min.
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.
文富彬;靳焘
中国科学院广州化学研究所,广东 广州 510650||中科检测技术服务(广州)股份有限公司,广东 广州 510650中国科学院广州化学研究所,广东 广州 510650||中科检测技术服务(广州)股份有限公司,广东 广州 510650||中国科学院新型特种精细化学品工程实验室,广东 广州 510650||国科广化韶关新材料研究院,广东韶关 512400||国科广化精细化工孵化器(南雄)有限公司,广东 南雄 512400||中国科学院大学,北京 100049
化学化工
介孔硅泡沫树形聚酰胺胺"接枝到"法吸附铅离子
mesocellular siliceous foamdendritic polyamidoaminegraft onto methodadsorptionlead(Ⅱ)
《广州化学》 2026 (2)
54-59,6
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