This paper presents an oil removal system design based on the use of hydrophobic silica (SiO2/PDMS) obtained by the co-condensation of silica with polydimethylsiloxane (PDMS) using DBTL as a polycondensation catalyst. The hydrophobic silica entrapped in the foam was evaluated by gravimetry; in addition, infrared spectroscopy will allow the identification of hydrophobic silica in the foam and the main functional groups in the foam. The hydrophobic character was determined through the modification in the water absorption capacity of the foam and by measuring the contact angle. On the other hand, optical microscopy allowed the identification of changes in the foam surface due to the presence of SiO2/ PDMS. Finally, the effect of the amount of PDMS on the oil-in-water removal capacity was determined.
Automotive paint is used on the surface of cars, to decorate or beautify the vehicle. However, one of its main functions is to prevent metal corrosion. The proposal that was developed was to investigate the anticorrosive properties of a primer based on epoxy resin with nano-silica particles (NPS). NPS/Polymer coatings were deposited on A-36 steel plates and its efficiency as anticorrosive coating was determined; as well as coating properties such as adhesion, finish and durability before Accelerated aging tests simulating weather conditions of humidity and heat.
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