sponge did not notably change when the PDMS sponge was
reused multiple times. When the PDMS sponge was immersed in
water after the reusability test, it still did not absorb any water,
indicating that hydrophobicity was not lost.
In addition, the absorption of chloroform (1.48 g cm3) from
water by thePDMS sponge was carried out to verify the use of the
sponge with organic contaminants with higher densities than that
of water. As shown in Figure 4c, the PDMS sponge was not
wetted by water due to its hydrophobicity, and chloroform sunk
to the bottom of the water, owing to higher density than water.
However, vigorous stirring can overcome this drawback (see the
Supporting Information, Movie 4). With this technique, nearly
all of the chloroform was fully absorbed into the PDMS sponge
within a few seconds.
sponge did not notably change when the PDMS sponge was
reused multiple times. When the PDMS sponge was immersed in
water after the reusability test, it still did not absorb any water,
indicating that hydrophobicity was not lost.
In addition, the absorption of chloroform (1.48 g cm3) from
water by thePDMS sponge was carried out to verify the use of the
sponge with organic contaminants with higher densities than that
of water. As shown in Figure 4c, the PDMS sponge was not
wetted by water due to its hydrophobicity, and chloroform sunk
to the bottom of the water, owing to higher density than water.
However, vigorous stirring can overcome this drawback (see the
Supporting Information, Movie 4). With this technique, nearly
all of the chloroform was fully absorbed into the PDMS sponge
within a few seconds.
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