Abstract
This paper addresses the preparation of electrically conductive electrospun mats on a base of styrene-isoprene-styrene copolymer (SIS) and multiwall carbon nanotubes (CNTs) and their application as active sensing elements for the detection of vegetable oil impurities dispersed within water. The most uniform mats without beads were prepared using tetrahydrofuran (THF)/dimethyl formamide (DMF) 80:20 (v/v) as the solvent and 13 wt.% of SIS. The CNT content was 10 wt.%, which had the most pronounced changes in electrical resistivity upon sorption of the oil component. The sensors were prepared by deposition of the SIS/CNT layer onto gold electrodes through electrospinning and applied for sensing of oil dispersed in water for 50, 100, and 1000 ppm.
Highlights
Continuous improvement of people’s living standards is associated with intensive catering industry development, which results in a large amount of restaurant wastewater contaminated by various amounts of vegetable and animal oils
The following materials were used in this study: Styrene-isoprene-styrene (SIS) tri-block copolymer, 30 wt.% polystyrene (KRATON D1165 PT, KRATON POLYMERS, Belpre, OH, USA), multiwall carbon nanotubes (CNTs) with an outer diameter of 20–30 nm and a length of 10–30 μm, dimethyl formamide (DMF)
In the case of a solution of styrene-isoprene-styrene copolymer (SIS) and CNTs, CNTs were first added to a DMF/THF solution followed by two drops of Triton X, and were sonicated using an internal probe for 30 min
Summary
Continuous improvement of people’s living standards is associated with intensive catering industry development, which results in a large amount of restaurant wastewater contaminated by various amounts of vegetable and animal oils. Several international conventions regulate the concentration of oil, which can be discharged to the environment from 15 to 42 ppm [3].There are several analytical techniques, such as measuring total organic content, spectroscopy, and chromatography, to measure contamination of water by oil. These techniques require using costly and non-compact instruments. A cheap, simple, and portable tool to detect oil contamination would be useful
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