3.2 Demulsification performances
Amphipathicity was a crucial characteristic for
demulsifier6,14. Therefore, the wettability of the
obtained MIL-100(Fe) was measured initially. As showed in Fig. S3, the
water and oleic acid drops permeated into the plane of MIL-100(Fe)
quickly, which suggested that the MIL-100(Fe) was amphipathic.
Subsequently, the demulsification performance was investigated using
MIL-100(Fe) as a heterogeneous demulsifier. Compared with the
homogeneous milky model emulsion (an average diameter of 2.53 um), the
demulsified liquid was transparent without obvious emulsion drops
(Fig. 2a and 2b ). The demulsified MIL-100(Fe) floated
on the water (Fig. 2a ), which confirmed that the oil phase
released from emulsion drops by the MIL-100(Fe). At an optimal condition
of dosage and concentration, the DE can exceed 99% (Fig. S4 ).