Sorption and retention capacity of modified fibrous-porous materials in relation to oil and petroleum products
Keywords:sorption, oil, diesel fuel, corona discharge, polarization, electret state, physical model
Purpose. Investigation of the effect of electric polarization of polymeric fibrous materials on the sorption of oil and petroleum products.
Methods. Melt blowing of Borealis brand polypropylene. Polarization of samples in a corona discharge field of positive and negative polarity with a strength of 25 kV/cm. Sample processing in low-temperature oxygen plasma of a glow discharge with a frequency of 35 kHz. Weighting method for determining sorption characteristics. Scanning electron microscopy method. Electret thermal analysis method.
Findings. The dependence of sorption parameters of materials on the type of physical modification – corona discharge of different polarity and low-temperature plasma of a glow discharge – has been established. It is shown that the modification of fibrous-porous materials in a corona discharge field to impart electret properties to them somewhat reduces the sorption characteristics of these materials in relation to oil. In the manufacture of sorption materials for the collection of crude oil, the original unmodified fibrous-porous material should be used. It has been experimentally established that in the manufacture of sorption materials for the collection of light oil fractions, the preferred method is the modification of fibers in a corona discharge field of negative polarity. Electrization has a significant effect on the processes of sorption by fibers of its lipophilic components. A physical model of the sorption of petroleum products by electret samples of polymeric fibrous-porous materials is proposed.
Application field of research. Fibrous-porous polymeric materials subjected to physical modification with the formation of an electret state can be used for: sorption of some oil fractions, filtration of liquids from contaminants of a dielectric nature, purification of air from ionized dust containing radioactive particles, targeted separation of biological fluids containing dielectric and (or) electret components.
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