1 research outputs found
Dually Prewetted Underwater Superoleophobic and under Oil Superhydrophobic Fabric for Successive Separation of Light Oil/Water/Heavy Oil Three-Phase Mixtures
Remediation
of oil spills requires new technologies to separate light oil/water/heavy
oil mixtures. Low-cost, biological, and environmentally friendly materials
are needed to treat water pollution caused by oils. In this study,
a corn straw powder (CSP)-coated fabric (CSPF) was fabricated by spraying
waste CSP and polyurethane onto amphiphilic cotton fabric, and thus,
the wettability of CSPF is enhanced by taking advantage of the hierarchical
structure and increased surface roughness. Therefore, the CSPF could
be dually prewetted (DCSPF) with both water and oil, and it showed
underwater superoleophobic and under oil superhydrophobic properties
without any further chemical modification. When applied to light oil/water/heavy
oil separation, the DCSPF could be used to successively separate light
oil/water/heavy oil three-phase mixtures under gravity with a high
separation efficiency and flux. In addition, the DCSPF showed excellent
structural and chemical stability according to repeated cycling and
corrosive solution/oil separation experiments. The results of this
study are of value in providing a simple, low-cost, and environment-friendly
approach for application in the field of successive separation of
light oil/water/heavy oil three-phase mixtures