title: Organic-inorganic hybrid gels for the selective absorption of oils from water.
abstract: Organic-inorganic hybrid gels were synthesized by the condensation of a linear aliphatic diol (1,8-octanediol) and altering the chain length of the alkyltriethoxysilanes (from ethyltriethoxysilane to hexadecyltrimethoxysilane) through a bulk polymerization process without using any initiator, activator, catalyst, or solvent for the selective removal of oils from water. Fourier transform infrared spectroscopy (FTIR) and solid-state (13)C and (29)Si cross-polarization magic-angle spinning nuclear magnetic resonance (CPMAS NMR) were used for the structural analysis of hybrid gels. Thermal properties of the hybrid gels were determined by thermogravimetric analysis (TGA). Oil absorbency of organic-inorganic hybrid gels was determined by oil absorption tests. The results showed that hybrid gels have high and fast absorption capacities and excellent reusability. Good selectivity, high thermal stability, low density, and excellent recyclability for the oil removal give the material potential applications.
authors.affiliation: Department of Chemistry, Gebze Technical University, PO. Box 141, 41400, Gebze, Kocaeli, Turkey.
authors.forename: Gulsah
authors.initials: G
authors.lastname: Ozan Aydin
authors.affiliation: Department of Chemistry, Gebze Technical University, PO. Box 141, 41400, Gebze, Kocaeli, Turkey. hayalsonmez@gtu.edu.tr.
authors.forename: Hayal
authors.initials: H
authors.lastname: Bulbul Sonmez
mesh_terms: D065966:Absorption, Physicochemical; D000438:Alcohols; D005782:Gels / Q000138:chemical synthesis*; D009682:Magnetic Resonance Spectroscopy; D000442:Octanols / Q000737:chemistry*; D009821:Oils / Q000737:chemistry; D059392:Petroleum Pollution / Q000517:prevention & control*; D058105:Polymerization; D012821:Silanes / Q000737:chemistry*; D012997:Solvents / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D014867:Water; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D000438:Alcohols; D005782:Gels; D000442:Octanols; D009821:Oils; D012821:Silanes; D012997:Solvents; D014874:Water Pollutants, Chemical; D014867:Water; C522569:triethoxysilane
keywords: Absorption kinetic; Alkyltriethoxysilanes; Crude oil; Desorption kinetic; Hybrid gel; Oil absorbency; Reusability; Selectivity