3. Results and discussion
3.1. Characterization of the magnetic PMADETA/PDVB IPNs
Fig. 1(a) and (b) show the typical photographs of Fe3O4 nanoparticles and OA-coated Fe3O4 nanoparticles dispersed in toluene and water. It is seen that Selumetinib the Fe3O4 nanoparticles cannot be dispersed in toluene and water, while the OA-coated Fe3O4 nanoparticles possess good dispersion ability in toluene. Additionally, the magnetic PMADETA/PDVB IPNs can be well dispersed in water (Fig. 1(c)), which may be attributed to the fact that many hydrophilic functional groups such as the amino, amide and ester groups are uploaded on the surface of the IPNs. In addition, it can be easily separated by a magnet from aqueous solution within 30 s (Fig. 1(d)). XRD and FT-IR spectra (Fig. S1(a) and (b)) indicate that existence of iron oxide particles (Fe3O4)  and , and TEM image (Fig. S1(c)) displays that the OA-coated Fe3O4 nanoparticles have the diameter of 5–10 nm.