CPC B01D 17/0202 (2013.01) [C08J 9/42 (2013.01); C08J 2361/28 (2013.01); C08J 2375/04 (2013.01); C08J 2405/08 (2013.01); C08J 2429/04 (2013.01)] | 18 Claims |
1. A preparation method of a hydrophilic/oleophobic sponge, comprising the following steps:
mixing a nanoparticle suspension with a modifier solution to obtain a modified solution, wherein the nanoparticle suspension comprises a silica-encapsulated Fe3O4 nanoparticle suspension and/or a nano-silica ethanol suspension, and the modifier solution is a mixture of chitosan-acetic acid aqueous solution and polyvinyl alcohol (PVA) aqueous solution; and
soaking a sponge in the modified solution, mixing and crosslinking with glutaraldehyde aqueous solution to obtain the hydrophilic/oleophobic sponge:
wherein a mass ratio of modifiers in the modifier solution to glutaraldehyde in the glutaraldehyde aqueous solution is (2.7-1.5):(0.020-0.10).
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