For the reusability test of the material, 10 g of the motor or vegetable
oil was poured into a beaker containing 100mL of purified
water, and then 0.1 g of the SCWS was placed on the oil surface.
Five cycles of the sorption process were performed for each sample.
Between the each cycle, material was squeezed, and weighed.
The recovery of oil at the first cycle was calculated by dividing
the quantity of the recovered oil through squeezing the oil-sorbed
material by the initial quantity of the oil sorbed on the material
before squeezing.