Ceramic SiO2/PDMS as a remover of oily substances in aquifers
Abstract
Hybrid ceramic from TEOS and polydimethylsiloxane (PDMS) is presented as oil remove systems, which was obtained by sol-gel process using HCl as catalysts and PDMS concentration between 10- 40%w. The sol-TEOS/PDMS solution was impregnated in a porous system (sponge) to modify its hydrophilic character to hydrophobic that can be used as an oil removal system. The modification of the sponge was evaluated by infrared spectroscopy observing the vibration modes at 1100cm-1 for the siloxane bond (Si-O-Si) and at 1200 cm-1 (Si-C). On the other hand, the hydrophobic character was assessed with the contact angle (q), observing values between 110-130º. Physical sponge surface changes due to ceramic deposited, was observed by optical microscopy and finally the effect of the amount of PDMS on the oil removal capacity was determined
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References
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