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  • Hydrophobic poly(alkoxysilane) organogels as sorbent material for oil spill cleanup.

Hydrophobic poly(alkoxysilane) organogels as sorbent material for oil spill cleanup.

Marine pollution bulletin (2015-05-24)
Gulsah Ozan Aydin, Hayal Bulbul Sonmez
ABSTRACT

In this study, reusable poly(alkoxysilane) organogels with high absorption capacities were synthesized by the condensation of a cyclo aliphatic glycol (UNOXOL™) and altering the chain length of the alkyltriethoxysilanes. The structural and thermal properties of cross-linked poly(alkoxysilane) polymers were determined by FTIR, solid-state (13)C and (29)Si CPMAS NMR and TGA. The oil absorbency of poly(alkoxysilane)s was determined through oil absorption tests, absorption and desorption kinetics. Results showed that the highest oil absorbency capacities were found to be 295% for hexane, 389% for euro diesel, 428% for crude oil, 652% for gasoline, 792% for benzene, 792% for toluene, 868% for tetrahydrofuran, and 1060% for dichloromethane for the poly(alkoxysilane) gels based on UNOXOL™ and dodecyltriethoxysilane. Owing to their hydrophobic structure, the poly(alkoxysilane) organogels can selectively absorb crude oil from water. The reusability of the absorbents was quantitatively investigated, demonstrating that absorbents can be used effectively at least nine times.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Tetrahydrofuran, JIS special grade, ≥99.5%
Sigma-Aldrich
n-Octadecyltriethoxysilane, AldrichCPR
Sigma-Aldrich
Tetrahydrofuran, suitable for HPLC, ≥99.9%, inhibitor-free
Sigma-Aldrich
Tetrahydrofuran, anhydrous, ≥99.9%, inhibitor-free
Sigma-Aldrich
Argon, ≥99.998%
Sigma-Aldrich
Tetrahydrofuran, anhydrous, contains 250 ppm BHT as inhibitor, ≥99.9%
Sigma-Aldrich
Rhein, technical grade
Sigma-Aldrich
Rhein
Sigma-Aldrich
Triethoxy(octyl)silane, deposition grade, 97%, 99.99% trace metals basis
Sigma-Aldrich
Tetrahydrofuran, SAJ first grade, ≥99.0%
Sigma-Aldrich
Tetrahydrofuran, suitable for HPLC, contains no stabilizer
Sigma-Aldrich
Triethoxy(octyl)silane, 97%
Sigma-Aldrich
Dichloromethane, anhydrous, ≥99.8%, contains 40-150 ppm amylene as stabilizer
Sigma-Aldrich
Dodecyltriethoxysilane, technical
Sigma-Aldrich
Dichloromethane, suitable for HPLC, ≥99.9%, contains 40-150 ppm amylene as stabilizer
Supelco
Toluene, HPLC grade, 99.8%
Sigma-Aldrich
Benzene, anhydrous, 99.8%
Supelco
Dichloromethane, ≥99.9%
Sigma-Aldrich
Toluene, anhydrous, 99.8%
Sigma-Aldrich
Hexane, suitable for HPLC
Sigma-Aldrich
Toluene, SAJ first grade, ≥99.0%
Sigma-Aldrich
Toluene, JIS 1000, for residue analysis, ≥99.8%
Sigma-Aldrich
Hexane, HPLC Plus, for HPLC, GC, and residue analysis, ≥95%
Sigma-Aldrich
Hexane, for residue analysis, JIS 5000
Sigma-Aldrich
Toluene, JIS special grade, ≥99.5%
Sigma-Aldrich
Benzene, JIS special grade, ≥99.5%
Sigma-Aldrich
Benzene, JIS 300, ≥99.5%, for residue analysis
Sigma-Aldrich
Hexane, ≥96.0%, suitable for residual phthalate analysis
Sigma-Aldrich
Benzene, SAJ first grade, ≥99.0%
Sigma-Aldrich
Hexane, JIS 300, ≥96.0%, for residue analysis