Nizam M El-Ashgar, Issa M El-Nahhal, Mohamed M Chehimi, Florence Babonneau, Jacques Livage
الملخص العربي
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.
تاريخ النشر
01/03/2012
الناشر
Phosphorus, Sulfur, and Silicon and the Related Elements
أ.د نظام محمود الأشقر | Prof. Nizam M. El-Ashgar | 13586