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Effect of Polyethylenimine Loading on the Physicochemical Properties of Amine-Functionalized Si-MCM-41

Ahmed , Sohail and Ramli, Anita and Yusup, Suzana (2012) Effect of Polyethylenimine Loading on the Physicochemical Properties of Amine-Functionalized Si-MCM-41. [Citation Index Journal]

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Abstract

Si-MCM-41 with highly ordered uniform mesopores was synthesized hydrothermally at 100 oC. The calcined Si-MCM-41 was then functionalized with 10-50% (w/w) polyethylenimine (PEI) via impregnation method. The physicochemical properties of these samples were characterized using FTIR, TGA, FESEM, TEM and CHNS analysis. Results show that the Si-MCM-41 was successfully functionalized with PEI. FTIR analysis shows that all the characteristic peaks of Si-MCM-41 i.e. 794, 1080 & 1240 cm-1 are still present in PEI-functionalized Si-MCM-41, which means that the mesoporous frame work is preserved. TGA analysis shows that the PEI-functionalized Si-MCM-41 is thermally stable up to 200-250 oC. FESEM images show that as the PEI weight percent increases to 50wt%, the PEI-functionalized Si-MCM-41 became agglomerated, which indicates that the PEI is distributed into the pores and on the external surface of the Si-MCM-41. TEM results also show that the hexagonal pore structure remains intact and the pores are filled with PEI. CHNS analysis confirms the presence of nitrogen in the PEI-functionalized Si-MCM-41.

Item Type:Citation Index Journal
Subjects:Q Science > QD Chemistry
Departments / MOR / COE:Departments > Fundamental & Applied Sciences
ID Code:8661
Deposited By: Assoc Prof Dr Anita Ramli
Deposited On:13 Dec 2012 11:39
Last Modified:19 Jan 2017 08:21

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