Synthesis of polysiloxane-immobilized monoamine, diamine, and triamine ligand systems in the presence of CTAB and their applications -أريد

Publication Type: Journal
Arabic Authors: Nizam M El-Ashgar, Issa M El-Nahhal, Mohamed M Chehimi, Florence Babonneau, Jacques Livage
Abstract: Polysiloxane-immobilized monoamine, diamine, and triamine ligand systems of the general formula P-(CH2)3-X [where P represents a polysiloxane three-dimension silica like network, and X represents monoamine(-NH2), diamine (-NH(CH2)2NH2), or triamine (-NH(CH2)2NH(CH2)2NH2) functional ligand groups] were prepared by hydrolytic polycondensation of the tetraethylorthosilicate (TEOS) and the appropriate amine silane coupling agent (RO)3Si-(CH2)3X in the presence of cetyltrimethylammonium bromide (CTAB) as surfactant using the sol-gel method. The polysiloxane-immobilized amine ligand systems exhibit a higher potential for divalent metal ions (Cu2+, Ni2+, Co2+) when CTAB was used as surfactant than those of the corresponding polysiloxane ligand systems prepared without CTAB. X-ray Photoelectron Spectroscopy (XPS) analyses show a significant change in the surface composition as resulting from the incorporation of CTAB, which can be related to the increase in the uptake of metal ions.
Publication Date: 3/1/2012
Publisher: Phosphorus, Sulfur, and Silicon and the Related Elements
DOI: http://dx.
External Link: http://www.tandfonline.com/doi/abs/10.1080/10426507.2011.615772
Keywords: Functionalized polysiloxanes, preconcentration of metal ions, polysiloxane-immobilized amine ligand